diff options
Diffstat (limited to 'contrib')
38 files changed, 2898 insertions, 1127 deletions
diff --git a/contrib/gcc/ChangeLog b/contrib/gcc/ChangeLog index 3d40878..2ba7967 100644 --- a/contrib/gcc/ChangeLog +++ b/contrib/gcc/ChangeLog @@ -1,3 +1,75 @@ +2001-01-25 Bernd Schmidt <bernds@redhat.co.uk> + + * version.c: Bump. + + * varasm.c (force_const_mem): When putting a LABEL_REF into the + constant pool, also put it on forced_labels list so that it won't + be deleted. + + 2000-05-25 Alexandre Oliva <aoliva@cygnus.com> + * emit-rtl.c (reset_used_decls): New function. + (unshare_all_rtl_again): Call it. + + 2000-05-24 Alexandre Oliva <oliva@lsd.ic.unicamp.br> + * emit-rtl.c (unshare_all_decls): New function. + (unshare_all_rtl): Call it. + + 2000-05-20 Alexandre Oliva <aoliva@cygnus.com> + * emit-rtl.c (unshare_all_rtl): Store the copied rtx. + + 2000-04-15 Richard Earnshaw (rearnsah@arm.com) + * emit-rtl.c (unshare_all_rtl_again): Unmark everything, then + call unshare_all_rtl. + + 2000-01-27 Geoffrey Keating <geoffk@cygnus.com> + * emit-rtl.c (unshare_all_rtl): Unshare virtual parameters too. + Use unshare_all_rtl_1. + (unshare_all_rtl_again): New function. + (unshare_all_rtl_1): New function split out of unshare_all_rtl. + * function.c (purge_addressof_1): Use unshare_all_rtl_again + rather than resetting the 'used' flags ourself. + * toplev.c (rest_of_compilation): Add current_function_decl + to the unshare_all_rtl call. + * tree.h: Prototype unshare_all_rtl. + * rtl.h: Prototype unshare_all_rtl_again here. + +2001-01-12 Bernd Schmidt <bernds@redhat.co.uk> + + * version.c: Bump. + + * expr.c (expand_builtin_setjmp_receiver): Emit a scheduling barrier + as last insn. + +2001-01-11 Bernd Schmidt <bernds@redhat.co.uk> + + * version.c: Bump. + + 2001-01-09 Mark Mitchell <mark@codesourcery.com> + Remove support for using UWIN as a host machine. + * configure.in: Issue an error message. + * configure: Regenerated. + * config.gcc: Remove xm_* UWIN configury. + * config/i386/xm-uwin.h: Remove. + + * config/mips/vxworks.h: Don't terminate comment before its end. + + * invoke.texi: Update -fvtable-thunks documentation. + + * loop.c (scan_loop): Disable copy propagation if we find a REG_LABEL + note. + + Revert this patch: + 2000-12-18 David Edelsohn <edelsohn@gnu.org> + * rs6000.c (and64_operand): Use logical_u_operand. + + Mon Oct 4 16:56:11 1999 Richard Henderson <rth@cygnus.com> + * tree.c (build1): Set TREE_SIDE_EFFECTS for expressions that + always have side-effects. + + Mon Oct 4 02:12:41 1999 Mark Mitchell <mark@codesourcery.com> + * tree.c (make_node): Set TREE_SIDE_EFFECTS for expressions that + always have side-effects. + 2001-01-01 Bernd Schmidt <bernds@redhat.co.uk> * version.c: Bump. diff --git a/contrib/gcc/NEWS b/contrib/gcc/NEWS index 427df25..d66c6e8 100644 --- a/contrib/gcc/NEWS +++ b/contrib/gcc/NEWS @@ -1,1071 +1,1540 @@ -Noteworthy changes in GCC after EGCS 1.1. ------------------------------------------ - -Target specific NEWS - - RS6000/PowerPC: -mcpu=401 was added as an alias for -mcpu=403. -mcpu=e603e - was added to do -mcpu=603e and -msoft-float. - -Noteworthy changes in GCC for EGCS 1.1. ---------------------------------------- - -The compiler now implements global common subexpression elimination (gcse) as -well as global constant/copy propagation. (link to gcse page). - -More major improvements have been made to the alias analysis code. A new -option to allow front-ends to provide alias information to the optimizers -has also been added (-fstrict-aliasing). -fstrict-aliasing is off by default -now, but will be enabled by default in the future. (link to alias page) - -Major changes continue in the exception handling support. This release -includes some changes to reduce static overhead for exception handling. It -also includes some major changes to the setjmp/longjmp based EH mechanism to -make it less pessimistic. And finally, major infrastructure improvements -to the dwarf2 EH mechanism have been made to make our EH support extensible. - -We have fixed the infamous security problems with temporary files. - -The "regmove" optimization pass has been nearly completely rewritten. It now -uses much more information about the target to determine profitability of -transformations. - -The compiler now recomputes register usage information immediately before -register allocation. Previously such information was only not kept up to -date after instruction combination which led to poor register allocation -choices by our priority based register allocator. - -The register reloading phase of the compiler has been improved to better -optimize spill code. This primarily helps targets which generate lots of -spills (like the x86 ports and many register poor embedded ports). - -A few changes in the heuristics used by the register allocator and scheduler -have been made which can significantly improve performance for certain -applications. - -The compiler's branch shortening algorithms have been significantly improved -to work better on targets which align jump targets. - -The compiler now supports the "ADDRESSOF" optimization which can significantly -reduce the overhead for certain inline calls (and inline calls in general). - -The compiler now supports a code size optimization switch (-Os). When enabled -the compiler will prefer optimizations which improve code size over those -which improve code speed. - -The compiler has been improved to completely eliminate library calls which -compute constant values. This is particularly useful on machines which -do not have integer mul/div or floating point support on-chip. - -GCC now supports a "--help" option to print detailed help information. - -cpplib has been greatly improved. It is probably useable for some sites now -(major missing feature is trigraphs). - -Memory footprint for the compiler has been significantly reduced for certain -pathalogical cases. - -Build time improvements for targets which support lots of sched parameters -(alpha and mips primarily). - -Compile time for certain programs using large constant initializers has been -improved (effects glibc significantly). - -Plus an incredible number of infrastructure changes, warning fixes, bugfixes -and local optimizations. - -Various improvements have been made to better support cross compilations. They -are still not easy, but they are improving. - -Target specific NEWS - - Sparc: Now includes V8 plus and V9 support, lots of tuning for Ultrasparcs - and uses the Haifa scheduler by default. - - Alpha: EV6 tuned, optimized expansion of memcpy/bzero. - - x86: Data in the static store is aligned per Intel recommendations. Jump - targets are aligned per Intel recommendations. Improved epilogue - sequences for Pentium chips. Backend improvements which should help - register allocation on all x86 variants. Support for PPro conditional - move instructions has been fixed and enabled. Random changes - throughout the port to make generated code more Pentium friendly. - Improved support for 64bit integer operations. - Unixware 7, a System V Release 5 target is now supported. - SCO OpenServer targets can support GAS. See gcc/INSTALL for details. - - RS6000/PowerPC: Includes AIX4.3 support as well as PowerPC64 support. - Haifa instruction scheduling is enabled by default now. - - MIPS: Multiply/Multiply-Add support has been largely rewritten to generate - more efficient code. Includes mips16 support. - - M68K: Various micro-optimizations and Coldfire fixes. - - M32r: Major improvements to this port. - - Arm: Includes Thumb and super interworking support. - -EGCS includes all gcc2 changes up to and including the June 9, 1998 snapshot. - - -Noteworthy changes in GCC version 2.8.1 ---------------------------------------- - -Numerous bugs have been fixed and some minor performance -improvements (compilation speed) have been made. - -Noteworthy changes in GCC version 2.8.0 ---------------------------------------- - -A major change in this release is the addition of a framework for -exception handling, currently used by C++. Many internal changes and -optimization improvements have been made. These increase the -maintainability and portability of GCC. GCC now uses autoconf to -compute many host parameters. - -The following lists changes that add new features or targets. - -See cp/NEWS for new features of C++ in this release. - -New tools and features: - - The Dwarf 2 debugging information format is supported on ELF systems, and - is the default for -ggdb where available. It can also be used for C++. - The Dwarf version 1 debugging format is also permitted for C++, but - does not work well. - - gcov.c is provided for test coverage analysis and branch profiling - analysis is also supported; see -fprofile-arcs, -ftest-coverage, - and -fbranch-probabilities. - - Support for the Checker memory checking tool. - - New switch, -fstack-check, to check for stack overflow on systems that - don't have such built into their ABI. - - New switches, -Wundef and -Wno-undef to warn if an undefined identifier - is evaluated in an #if directive. - - Options -Wall and -Wimplicit now cause GCC to warn about implicit int - in declarations (e.g. `register i;'), since the C Standard committee - has decided to disallow this in the next revision of the standard; - -Wimplicit-function-declarations and -Wimplicit-int are subsets of - this. - - Option -Wsign-compare causes GCC to warn about comparison of signed and - unsigned values. - - Add -dI option of cccp for cxref. - -New features in configuration, installation and specs file handling: - - New option --enable-c-cpplib to configure script. - - You can use --with-cpu on the configure command to specify the default - CPU that GCC should generate code for. - - The -specs=file switch allows you to override default specs used in - invoking programs like cc1, as, etc. - - Allow including one specs file from another and renaming a specs - variable. - - You can now relocate all GCC files with a single environment variable - or a registry entry under Windows 95 and Windows NT. - -Changes in Objective-C: - - The Objective-C Runtime Library has been made thread-safe. - - The Objective-C Runtime Library contains an interface for creating - mutexes, condition mutexes, and threads; it requires a back-end - implementation for the specific platform and/or thread package. - Currently supported are DEC/OSF1, IRIX, Mach, OS/2, POSIX, PCThreads, - Solaris, and Windows32. The --enable-threads parameter can be used - when configuring GCC to enable and select a thread back-end. - - Objective-C is now configured as separate front-end language to GCC, - making it more convenient to conditionally build it. - - The internal structures of the Objective-C Runtime Library have - changed sufficiently to warrant a new version number; now version 8. - Programs compiled with an older version must be recompiled. - - The Objective-C Runtime Library can be built as a DLL on Windows 95 - and Windows NT systems. - - The Objective-C Runtime Library implements +load. - -The following new targets are supported (see also list under each -individual CPU below): - - Embedded target m32r-elf. - Embedded Hitachi Super-H using ELF. - RTEMS real-time system on various CPU targets. - ARC processor. - NEC V850 processor. - Matsushita MN10200 processor. - Matsushita MN10300 processor. - Sparc and PowerPC running on VxWorks. - Support both glibc versions 1 and 2 on Linux-based GNU systems. - -New features for DEC Alpha systems: - - Allow detailed specification of IEEE fp support: - -mieee, -mieee-with-inexact, and -mieee-conformant - -mfp-trap-mode=xxx, -mfp-round-mode=xxx, -mtrap-precision=xxx - -mcpu=xxx for CPU selection - Support scheduling parameters for EV5. - Add support for BWX, CIX, and MAX instruction set extensions. - Support Linux-based GNU systems. - Support VMS. - -Additional supported processors and systems for MIPS targets: - - MIPS4 instruction set. - R4100, R4300 and R5000 processors. - N32 and N64 ABI. - IRIX 6.2. - SNI SINIX. - -New features for Intel x86 family: - - Add scheduling parameters for Pentium and Pentium Pro. - Support stabs on Solaris-x86. - Intel x86 processors running the SCO OpenServer 5 family. - Intel x86 processors running DG/UX. - Intel x86 using Cygwin32 or Mingw32 on Windows 95 and Windows NT. - -New features for Motorola 68k family: - - Support for 68060 processor. - More consistent switches to specify processor. - Motorola 68k family running AUX. - 68040 running pSOS, ELF object files, DBX debugging. - Coldfire variant of Motorola m68k family. - -New features for the HP PA RISC: - - -mspace and -mno-space - -mlong-load-store and -mno-long-load-store - -mbig-switch -mno-big-switch - - GCC on the PA requires either gas-2.7 or the HP assembler; for best - results using GAS is highly recommended. GAS is required for -g and - exception handling support. - -New features for SPARC-based systems: - - The ultrasparc cpu. - The sparclet cpu, supporting only a.out file format. - Sparc running SunOS 4 with the GNU assembler. - Sparc running the Linux-based GNU system. - Embedded Sparc processors running the ELF object file format. - -mcpu=xxx - -mtune=xxx - -malign-loops=xxx - -malign-jumps=xxx - -malign-functions=xxx - -mimpure-text and -mno-impure-text - - Options -mno-v8 and -mno-sparclite are no longer supported on SPARC - targets. Options -mcypress, -mv8, -msupersparc, -msparclite, -mf930, - and -mf934 are deprecated and will be deleted in GCC 2.9. Use - -mcpu=xxx instead. - -New features for rs6000 and PowerPC systems: - - Solaris 2.51 running on PowerPC's. - The Linux-based GNU system running on PowerPC's. - -mcpu=604e,602,603e,620,801,823,mpc505,821,860,power2 - -mtune=xxx - -mrelocatable-lib, -mno-relocatable-lib - -msim, -mmve, -memb - -mupdate, -mno-update - -mfused-madd, -mno-fused-madd - - -mregnames - -meabi - -mcall-linux, -mcall-solaris, -mcall-sysv-eabi, -mcall-sysv-noeabi - -msdata, -msdata=none, -msdata=default, -msdata=sysv, -msdata=eabi - -memb, -msim, -mmvme - -myellowknife, -mads - wchar_t is now of type long as per the ABI, not unsigned short. - -p/-pg support - -mcpu=403 now implies -mstrict-align. - Implement System V profiling. - - Aix 4.1 GCC targets now default to -mcpu=common so that programs - compiled can be moved between rs6000 and powerpc based systems. A - consequence of this is that -static won't work, and that some programs - may be slightly slower. - - You can select the default value to use for -mcpu=xxx on rs6000 and - powerpc targets by using the --with-cpu=xxx option when configuring the - compiler. In addition, a new options, -mtune=xxx was added that - selects the machine to schedule for but does not select the - architecture level. - - Directory names used for storing the multilib libraries on System V - and embedded PowerPC systems have been shortened to work with commands - like tar that have fixed limits on pathname size. - -New features for the Hitachi H8/300(H): - - -malign-300 - -ms (for the Hitachi H8/S processor) - -mint32 - -New features for the ARM: - - -march=xxx, -mtune=xxx, -mcpu=xxx - Support interworking with Thumb code. - ARM processor with a.out object format, COFF, or AOF assembler. - ARM on "semi-hosted" platform. - ARM running NetBSD. - ARM running the Linux-based GNU system. - -New feature for Solaris systems: - - GCC installation no longer makes a copy of system include files, - thus insulating GCC better from updates to the operating system. - - -Noteworthy changes in GCC version 2.7.2 ---------------------------------------- - -A few bugs have been fixed (most notably the generation of an -invalid assembler opcode on some RS/6000 systems). - -Noteworthy changes in GCC version 2.7.1 ---------------------------------------- - -This release fixes numerous bugs (mostly minor) in GCC 2.7.0, but -also contains a few new features, mostly related to specific targets. - -Major changes have been made in code to support Windows NT. - -The following new targets are supported: - - 2.9 BSD on PDP-11 - Linux on m68k - HP/UX version 10 on HP PA RISC (treated like version 9) - DEC Alpha running Windows NT - -When parsing C, GCC now recognizes C++ style `//' comments unless you -specify `-ansi' or `-traditional'. - -The PowerPC System V targets (powerpc-*-sysv, powerpc-*-eabi) now use the -calling sequence specified in the System V Application Binary Interface -Processor Supplement (PowerPC Processor ABI Supplement) rather than the calling -sequence used in GCC version 2.7.0. That calling sequence was based on the AIX -calling sequence without function descriptors. To compile code for that older -calling sequence, either configure the compiler for powerpc-*-eabiaix or use -the -mcall-aix switch when compiling and linking. - -Noteworthy changes in GCC version 2.7.0 ---------------------------------------- - -GCC now works better on systems that use ".obj" and ".exe" instead of -".o" and no extension. This involved changes to the driver program, -gcc.c, to convert ".o" names to ".obj" and to GCC's Makefile to use -".obj" and ".exe" in filenames that are not targets. In order to -build GCC on such systems, you may need versions of GNU make and/or -compatible shells. At this point, this support is preliminary. - -Object file extensions of ".obj" and executable file extensions of -".exe" are allowed when using appropriate version of GNU Make. - -Numerous enhancements were made to the __attribute__ facility including -more attributes and more places that support it. We now support the -"packed", "nocommon", "noreturn", "volatile", "const", "unused", -"transparent_union", "constructor", "destructor", "mode", "section", -"align", "format", "weak", and "alias" attributes. Each of these -names may also be specified with added underscores, e.g., "__packed__". -__attribute__ may now be applied to parameter definitions, function -definitions, and structure, enum, and union definitions. - -GCC now supports returning more structures in registers, as specified by -many calling sequences (ABIs), such as on the HP PA RISC. - -A new option '-fpack-struct' was added to automatically pack all structure -members together without holes. - -There is a new library (cpplib) and program (cppmain) that at some -point will replace cpp (aka cccp). To use cppmain as cpp now, pass -the option CCCP=cppmain to make. The library is already used by the -fix-header program, which should speed up the fixproto script. - -New options for supported targets: - - GNU on many targets. - NetBSD on MIPS, m68k, VAX, and x86. - LynxOS on x86, m68k, Sparc, and RS/6000. - VxWorks on many targets. - - Windows/NT on x86 architecture. Initial support for Windows/NT on Alpha - (not fully working). - - Many embedded targets, specifically UDI on a29k, aout, coff, elf, - and vsta "operating systems" on m68k, m88k, mips, sparc, and x86. - -Additional support for x86 (i386, i486, and Pentium): - - Work with old and new linkers for Linux-based GNU systems, - supporting both a.out and ELF. - FreeBSD on x86. - Stdcall convention. - -malign-double, -mregparm=, -malign-loops= and -malign-jumps= switches. - On ISC systems, support -Xp like -posix. - -Additions for RS/6000: - - Instruction scheduling information for PowerPC 403. - AIX 4.1 on PowerPC. - -mstring and -mno-string. - -msoft-float and floating-point emulation included. - Preliminary support for PowerPC System V.4 with or without the GNU as. - Preliminary support for EABI. - Preliminary support for 64-bit systems. - Both big and little endian systems. - -New features for MIPS-based systems: - - r4650. - mips4 and R8000. - Irix 6.0. - 64-bit ABI. - Allow dollar signs in labels on SGI/Irix 5.x. - -New support for HP PA RISC: - - Generation of PIC (requires binutils-2.5.2.u6 or later). - HP-UX version 9 on HP PA RISC (dynamically links even with -g). - Processor variants for HP PA RISC: 700, 7100, and 7100LC. - Automatic generation of long calls when needed. - -mfast-indirect-calls for kernels and static binaries. - - The called routine now copies arguments passed by invisible reference, - as required by the calling standard. - -Other new miscellaneous target-specific support: - - -mno-multm on a29k. - -mold-align for i960. - Configuration for "semi-hosted" ARM. - -momit-leaf-frame-pointer for M88k. - SH3 variant of Hitachi Super-H and support both big and little endian. - -Changes to Objective-C: - - Bare-bones implementation of NXConstantString has been added, - which is invoked by the @"string" directive. - - Class * has been changed to Class to conform to the NextSTEP and - OpenStep runtime. - - Enhancements to make dynamic loading easier. - - The module version number has been updated to Version 7, thus existing - code will need to be recompiled to use the current run-time library. - -GCC now supports the ISO Normative Addendum 1 to the C Standard. -As a result: - - The header <iso646.h> defines macros for C programs written - in national variants of ISO 646. - - The following digraph tokens are supported: - <: :> <% %> %: %:%: - These behave like the following, respectively: - [ ] { } # ## - - Digraph tokens are supported unless you specify the `-traditional' - option; you do not need to specify `-ansi' or `-trigraphs'. Except - for contrived and unlikely examples involving preprocessor - stringizing, digraph interpretation doesn't change the meaning of - programs; this is unlike trigraph interpretation, which changes the - meanings of relatively common strings. - - The macro __STDC_VERSION__ has the value 199409L. - - As usual, for full conformance to the standard, you also need a - C library that conforms. - -The following lists changes that have been made to g++. If some -features mentioned below sound unfamiliar, you will probably want to -look at the recently-released public review copy of the C++ Working -Paper. For PostScript and PDF (Adobe Acrobat) versions, see the -archive at ftp://research.att.com/dist/stdc++/WP. For HTML and ASCII -versions, see ftp://ftp.cygnus.com/pub/g++. On the web, see -http://www.cygnus.com/~mrs/wp-draft. - -The scope of variables declared in the for-init-statement has been changed -to conform to http://www.cygnus.com/~mrs/wp-draft/stmt.html#stmt.for; as a -result, packages such as groff 1.09 will not compile unless you specify the --fno-for-scope flag. PLEASE DO NOT REPORT THIS AS A BUG; this is a change -mandated by the C++ standardization committee. - -Binary incompatibilities: - - The builtin 'bool' type is now the size of a machine word on RISC targets, - for code efficiency; it remains one byte long on CISC targets. - - Code that does not use #pragma interface/implementation will most - likely shrink dramatically, as g++ now only emits the vtable for a - class in the translation unit where its first non-inline, non-abstract - virtual function is defined. - - Classes that do not define the copy constructor will sometimes be - passed and returned in registers. This may illuminate latent bugs in - your code. - -Support for automatic template instantiation has *NOT* been added, due -to a disagreement over design philosophies. - -Support for exception handling has been improved; more targets are now -supported, and throws will use the RTTI mechanism to match against the -catch parameter type. Optimization is NOT SUPPORTED with --fhandle-exceptions; no need to report this as a bug. - -Support for Run-Time Type Identification has been added with -frtti. -This support is still in alpha; one major restriction is that any file -compiled with -frtti must include <typeinfo.h>. - -Preliminary support for namespaces has been added. This support is far -from complete, and probably not useful. - -Synthesis of compiler-generated constructors, destructors and -assignment operators is now deferred until the functions are used. - -The parsing of expressions such as `a ? b : c = 1' has changed from -`(a ? b : c) = 1' to `a : b ? (c = 1)'. - -The code generated for testing conditions, especially those using || -and &&, is now more efficient. - -The operator keywords and, and_eq, bitand, bitor, compl, not, not_eq, -or, or_eq, xor and xor_eq are now supported. Use -ansi or --foperator-names to enable them. - -The 'explicit' keyword is now supported. 'explicit' is used to mark -constructors and type conversion operators that should not be used -implicitly. - -g++ now accepts the typename keyword, though it currently has no -semantics; it can be a no-op in the current template implementation. -You may want to start using it in your code, however, since the -pending rewrite of the template implementation to compile STL properly -(perhaps for 2.8.0, perhaps not) will require you to use it as -indicated by the current draft. - -Handling of user-defined type conversion has been overhauled so that -type conversion operators are now found and used properly in -expressions and function calls. - --fno-strict-prototype now only applies to function declarations with -"C" linkage. - -g++ now warns about 'if (x=0)' with -Wparentheses or -Wall. - -#pragma weak and #pragma pack are supported on System V R4 targets, as -are various other target-specific #pragmas supported by gcc. - -new and delete of const types is now allowed (with no additional -semantics). - -Explicit instantiation of template methods is now supported. Also, -'inline template class foo<int>;' can be used to emit only the vtable -for a template class. - -With -fcheck-new, g++ will check the return value of all calls to -operator new, and not attempt to modify a returned null pointer. - -The template instantiation code now handles more conversions when -passing to a parameter that does not depend on template arguments. -This means that code like 'string s; cout << s;' now works. - -Invalid jumps in a switch statement past declarations that require -initializations are now caught. - -Functions declared 'extern inline' now have the same linkage semantics -as inline member functions. On supported targets, where previously -these functions (and vtables, and template instantiations) would have -been defined statically, they will now be defined as weak symbols so -that only one out-of-line definition is used. - -collect2 now demangles linker output, and c++filt has become part of -the gcc distribution. - -Noteworthy changes in GCC version 2.6.3: - -A few more bugs have been fixed. - -Noteworthy changes in GCC version 2.6.2: - -A few bugs have been fixed. - -Names of attributes can now be preceded and followed by double underscores. - -Noteworthy changes in GCC version 2.6.1: - -Numerous (mostly minor) bugs have been fixed. - -The following new configurations are supported: - - GNU on x86 (instead of treating it like MACH) - NetBSD on Sparc and Motorola 68k - AIX 4.1 on RS/6000 and PowerPC systems - Sequent DYNIX/ptx 1.x and 2.x. - Both COFF and ELF configurations on AViiON without using /bin/gcc - Windows/NT on x86 architecture; preliminary - AT&T DSP1610 digital signal processor chips - i960 systems on bare boards using COFF - PDP11; target only and not extensively tested - -The -pg option is now supported for Alpha under OSF/1 V3.0 or later. - -Files with an extension of ".c++" are treated as C++ code. - -The -Xlinker and -Wl arguments are now passed to the linker in the -position they were specified on the command line. This makes it -possible, for example, to pass flags to the linker about specific -object files. - -The use of positional arguments to the configure script is no longer -recommended. Use --target= to specify the target; see the GCC manual. - -The 386 now supports two new switches: -mreg-alloc=<string> changes -the default register allocation order used by the compiler, and --mno-wide-multiply disables the use of the mul/imul instructions that -produce 64 bit results in EAX:EDX from 32 bit operands to do long long -multiplies and 32-bit division by constants. - -Noteworthy changes in GCC version 2.6.0: - -Numerous bugs have been fixed, in the C and C++ front-ends, as -well as in the common compiler code. - -This release includes the C, Objective-C, and C++ compilers. However, -we have moved the files for the C++ compiler (G++) files to a -subdirectory, cp. Subsequent releases of GCC will split these files -to a separate TAR file. - -The G++ team has been tracking the development of the ANSI standard for C++. -Here are some new features added from the latest working paper: - - * built-in boolean type 'bool', with constants 'true' and 'false'. - * array new and delete (operator new [] and delete []). - * WP-conforming lifetime of temporaries. - * explicit instantiation of templates (template class A<int>;), - along with an option (-fno-implicit-templates) to disable emission - of implicitly instantiated templates, obsoletes -fexternal-templates. - * static member constants (static const int foo = 4; within the - class declaration). - -Many error messages have been improved to tell the user more about the -problem. Conformance checking with -pedantic-errors has been -improved. G++ now compiles Fresco. - -There is now an experimental implementation of virtual functions using -thunks instead of Cfront-style vtables, enabled with -fvtable-thunks. -This option also enables a heuristic which causes the compiler to only -emit the vtable in the translation unit where its first non-inline -virtual function is defined; using this option and --fno-implicit-templates, users should be able to avoid #pragma -interface/implementation altogether. - -Signatures have been added as a GNU C++ extension. Using the option --fhandle-signatures, users are able to turn on recognition of -signatures. A short introduction on signatures is in the section -`Extension to the C++ Language' in the manual. - -The `g++' program is now a C program, rather than a shell script. - -Lots and lots and lots of bugs fixes, in nested types, access control, -pointers to member functions, the parser, templates, overload -resolution, etc, etc. - -There have been two major enhancements to the Objective-C compiler: - -1) Added portability. It now runs on Alpha, and some problems with - message forwarding have been addressed on other platforms. - -2) Selectors have been redefined to be pointers to structs like: - { void *sel_id, char *sel_types }, where the sel_id is the unique - identifier, the selector itself is no longer unique. - - Programmers should use the new function sel_eq to test selector - equivalence. - -The following major changes have been made to the base compiler and -machine-specific files. - -- The MIL-STD-1750A is a new port, but still preliminary. - -- The h8/300h is now supported; both the h8/300 and h8/300h ports come - with 32 bit IEEE 754 software floating point support. - -- The 64-bit Sparc (v9) and 64-bit MIPS chips are supported. - -- NetBSD is supported on m68k, Intel x86, and pc523 systems and FreeBSD - on x86. - -- COFF is supported on x86, m68k, and Sparc systems running LynxOS. - -- 68K systems from Bull and Concurrent are supported and System V - Release 4 is supported on the Atari. - -- GCC supports GAS on the Motorola 3300 (sysV68) and debugging - (assuming GAS) on the Plexus 68K system. (However, GAS does not yet - work on those systems). - -- System V Release 4 is supported on MIPS (Tandem). - -- For DG/UX, an ELF configuration is now supported, and both the ELF - and BCS configurations support ELF and COFF object file formats. - -- OSF/1 V2.0 is supported on Alpha. - -- Function profiling is also supported on Alpha. - -- GAS and GDB is supported for Irix 5 (MIPS). - -- "common mode" (code that will run on both POWER and PowerPC - architectures) is now supported for the RS/6000 family; the - compiler knows about more PPC chips. - -- Both NeXTStep 2.1 and 3 are supported on 68k-based architectures. - -- On the AMD 29k, the -msoft-float is now supported, as well as - -mno-sum-in-toc for RS/6000, -mapp-regs and -mflat for Sparc, and - -membedded-pic for MIPS. - -- GCC can now convert division by integer constants into the equivalent - multiplication and shift operations when that is faster than the - division. - -- Two new warning options, -Wbad-function-cast and - -Wmissing-declarations have been added. - -- Configurations may now add machine-specific __attribute__ options on - type; many machines support the `section' attribute. - -- The -ffast-math flag permits some optimization that violate strict - IEEE rules, such as converting X * 0.0 to 0.0. - -Noteworthy changes in GCC version 2.5.8: - -This release only fixes a few serious bugs. These include fixes for a -bug that prevented most programs from working on the RS/6000, a bug -that caused invalid assembler code for programs with a `switch' -statement on the NS32K, a G++ problem that caused undefined names in -some configurations, and several less serious problems, some of which -can affect most configuration. - -Noteworthy change in GCC version 2.5.7: - -This release only fixes a few bugs, one of which was causing bootstrap -compare errors on some systems. - -Noteworthy change in GCC version 2.5.6: - -A few backend bugs have been fixed, some of which only occur on one -machine. - -The C++ compiler in 2.5.6 includes: - - * fixes for some common crashes - * correct handling of nested types that are referenced as `foo::bar' - * spurious warnings about friends being declared static and never - defined should no longer appear - * enums that are local to a method in a class, or a class that's - local to a function, are now handled correctly. For example: - class foo { void bar () { enum { x, y } E; x; } }; - void bar () { class foo { enum { x, y } E; E baz; }; } - -Noteworthy change in GCC version 2.5.5: - -A large number of C++ bugs have been fixed. - -The fixproto script adds prototypes conditionally on __cplusplus. - -Noteworthy change in GCC version 2.5.4: - -A bug fix in passing of structure arguments for the HP-PA architecture -makes code compiled with GCC 2.5.4 incompatible with code compiled -with earlier versions (if it passes struct arguments of 33 to 64 bits, -interspersed with other types of arguments). - -Noteworthy change in gcc version 2.5.3: - -The method of "mangling" C++ function names has been changed. So you -must recompile all C++ programs completely when you start using GCC -2.5. Also, GCC 2.5 requires libg++ version 2.5. Earlier libg++ -versions won't work with GCC 2.5. (This is generally true--GCC -version M.N requires libg++ version M.N.) - -Noteworthy GCC changes in version 2.5: - -* There is now support for the IBM 370 architecture as a target. -Currently the only operating system supported is MVS; GCC does not run -on MVS, so you must produce .s files using GCC as a cross compiler, -then transfer them to MVS to assemble them. This port is not reliable -yet. - -* The Power PC is now supported. - -* The i860-based Paragon machine is now supported. - -* The Hitachi 3050 (an HP-PA machine) is now supported. - -* The variable __GNUC_MINOR__ holds the minor version number of GCC, as -an integer. For version 2.5.X, the value is 5. - -* In C, initializers for static and global variables are now processed -an element at a time, so that they don't need a lot of storage. - -* The C syntax for specifying which structure field comes next in an -initializer is now `.FIELDNAME='. The corresponding syntax for -array initializers is now `[INDEX]='. For example, - - char whitespace[256] - = { [' '] = 1, ['\t'] = 1, ['\n'] = 1 }; - -This was changed to accord with the syntax proposed by the Numerical -C Extensions Group (NCEG). - -* Complex numbers are now supported in C. Use the keyword __complex__ -to declare complex data types. See the manual for details. - -* GCC now supports `long double' meaningfully on the Sparc (128-bit -floating point) and on the 386 (96-bit floating point). The Sparc -support is enabled on Solaris 2.x because earlier system versions -(SunOS 4) have bugs in the emulation. - -* All targets now have assertions for cpu, machine and system. So you -can now use assertions to distinguish among all supported targets. - -* Nested functions in C may now be inline. Just declare them inline -in the usual way. - -* Packed structure members are now supported fully; it should be possible -to access them on any supported target, no matter how little alignment -they have. - -* To declare that a function does not return, you must now write -something like this (works only in 2.5): - - void fatal () __attribute__ ((noreturn)); - -or like this (works in older versions too): - - typedef void voidfn (); - - volatile voidfn fatal; - -It used to be possible to do so by writing this: - - volatile void fatal (); - -but it turns out that ANSI C requires that to mean something -else (which is useless). - -Likewise, to declare that a function is side-effect-free -so that calls may be deleted or combined, write -something like this (works only in 2.5): - - int computation () __attribute__ ((const)); - -or like this (works in older versions too): - - typedef int intfn (); - - const intfn computation; - -* The new option -iwithprefixbefore specifies a directory to add to -the search path for include files in the same position where -I would -put it, but uses the specified prefix just like -iwithprefix. - -* Basic block profiling has been enhanced to record the function the -basic block comes from, and if the module was compiled for debugging, -the line number and filename. A default version of the basic block -support module has been added to libgcc2 that appends the basic block -information to a text file 'bb.out'. Machine descriptions can now -override the basic block support module in the target macro file. - -New features in g++: - -* The new flag `-fansi-overloading' for C++. Use a newly implemented -scheme of argument matching for C++. It makes g++ more accurately -obey the rules set down in Chapter 13 of the Annotated C++ Reference -Manual (the ARM). This option will be turned on by default in a -future release. - -* The -finline-debug flag is now gone (it was never really used by the - compiler). - -* Recognizing the syntax for pointers to members, e.g., "foo::*bar", has been - dramatically improved. You should not get any syntax errors or incorrect - runtime results while using pointers to members correctly; if you do, it's - a definite bug. - -* Forward declaration of an enum is now flagged as an error. - -* Class-local typedefs are now working properly. - -* Nested class support has been significantly improved. The compiler - will now (in theory) support up to 240 nested classes before hitting - other system limits (like memory size). - -* There is a new C version of the `g++' driver, to replace the old - shell script. This should significantly improve the performance of - executing g++ on a system where a user's PATH environment variable - references many NFS-mounted filesystems. This driver also works - under MS-DOS and OS/2. - -* The ANSI committee working on the C++ standard has adopted a new - keyword `mutable'. This will allow you to make a specific member be - modifiable in an otherwise const class. - -Noteworthy GCC changes in version 2.4.4: - - A crash building g++ on various hosts (including m68k) has been - fixed. Also the g++ compiler no longer reports incorrect - ambiguities in some situations where they do not exist, and - const template member functions are now being found properly. - -Noteworthy GCC changes in version 2.4: - -* On each target, the default is now to return short structures -compatibly with the "usual" compiler on that target. - -For most targets, this means the default is to return all structures -in memory, like long structures, in whatever way is used on that -target. Use -freg-struct-return to enable returning short structures -(and unions) in registers. - -This change means that newly compiled binaries are incompatible with -binaries compiled with previous versions of GCC. - -On some targets, GCC is itself the usual compiler. On these targets, -the default way to return short structures is still in registers. -Use -fpcc-struct-return to tell GCC to return them in memory. - -* There is now a floating point emulator which can imitate the way all -supported target machines do floating point arithmetic. - -This makes it possible to have cross compilation to and from the VAX, -and between machines of different endianness. However, this works -only when the target machine description is updated to use the new -facilities, and not all have been updated. - -This also makes possible support for longer floating point types. -GCC 2.4 supports extended format on the 68K if you use `long double', -for targets that have a 68881. (When we have run time library -routines for extended floating point, then `long double' will use -extended format on all 68K targets.) - -We expect to support extended floating point on the i386 and Sparc in -future versions. - -* Building GCC now automatically fixes the system's header files. -This should require no attention. - -* GCC now installs an unsigned data type as size_t when it fixes the -header files (on all but a handful of old target machines). -Therefore, the bug that size_t failed to be unsigned is fixed. - -* Building and installation are now completely separate. -All new files are constructed during the build process; -installation just copies them. - -* New targets supported: Clipper, Hitachi SH, Hitachi 8300, and Sparc -Lite. - -* A totally new and much better Objective C run time system is included. - -* Objective C supports many new features. Alas, I can't describe them -since I don't use that language; however, they are the same ones -supported in recent versions of the NeXT operating system. - -* The builtin functions __builtin_apply_args, __builtin_apply and -__builtin_return let you record the arguments and returned -value of a function without knowing their number or type. - -* The builtin string variables __FUNCTION__ and __PRETTY_FUNCTION__ -give the name of the function in the source, and a pretty-printed -version of the name. The two are the same in C, but differ in C++. - -* Casts to union types do not yield lvalues. - -* ## before an empty rest argument discards the preceding sequence -of non-whitespace characters from the macro definition. -(This feature is subject to change.) - - -New features specific to C++: - -* The manual contains a new section ``Common Misunderstandings with -GNU C++'' that C++ users should read. - -* #pragma interface and #pragma implementation let you use the same -C++ source file for both interface and implementation. -However, this mechanism is still in transition. - -* Named returned values let you avoid an extra constructor call -when a function result has a class type. - -* The C++ operators <? and >? yield min and max, respectively. - -* C++ gotos can exit a block safely even if the block has -aggregates that require destructors. - -* gcc defines the macro __GNUG__ when compiling C++ programs. - -* GNU C++ now correctly distinguishes between the prefix and postfix -forms of overloaded operator ++ and --. To avoid breaking old -code, if a class defines only the prefix form, the compiler -accepts either ++obj or obj++, unless -pedantic is used. - -* If you are using version 2.3 of libg++, you need to rebuild it with -`make CC=gcc' to avoid mismatches in the definition of `size_t'. - -Newly documented compiler options: - --fnostartfiles - Omit the standard system startup files when linking. - --fvolatile-global - Consider memory references to extern and global data items to - be volatile. - --idirafter DIR - Add DIR to the second include path. - --iprefix PREFIX - Specify PREFIX for later -iwithprefix options. - --iwithprefix DIR - Add PREFIX/DIR to the second include path. - --mv8 - Emit Sparc v8 code (with integer multiply and divide). --msparclite - Emit Sparclite code (roughly v7.5). - --print-libgcc-file-name - Search for the libgcc.a file, print its absolute file name, and exit. - --Woverloaded-virtual - Warn when a derived class function declaration may be an error - in defining a C++ virtual function. - --Wtemplate-debugging - When using templates in a C++ program, warn if debugging is - not yet fully available. - -+eN - Control how C++ virtual function definitions are used - (like cfront 1.x). - +This file contains information about GCC releases which has been +generated automatically from the online release notes. This file +covers releases of GCC (and the former EGCS project) since EGCS 1.0, +on the line of development that led to GCC 3; for information on GCC +2.8.1 and older releases of GCC 2, see ONEWS. + +====================================================================== +http://gcc.gnu.org/gcc-2.95/gcc-2.95.3.html + + GCC 2.95.3 + + January 11, 2001 + + The GNU project and the GCC developers are pleased to announce the + prerelease of GCC version 2.95.3. GCC used to stand for the GNU C + Compiler, but since the compiler supports several other languages + aside from C, it now stands for the GNU Compiler Collection. + + This is a minor release to address several bugs in the [1]GCC version + 2.95.2 release. + + * Generic bugfixes and improvements + + Fix numerous problems that caused incorrect optimization in + the register reloading code. + + Fix numerous problems that caused incorrect optimization in + the loop optimizer. + + Fix setjmp/longjmp based exception handling. + + Fix aborts in the functions build_insn_chain and scan_loops + under some circumstances. + + Fix an alias analysis bug. + + Fix an infinite compilation bug in the combiner. + + A few problems with complex number support have been fixed. + + It is no longer possible for gcc to act as a fork bomb when + installed incorrectly. + + The -fpack-struct option should be recognized now. + + Fixed a bug that caused incorrect code to be generated due to + a lost stack adjustment. + * Platform specific bugfixes and improvements + + Support building ARM toolchains hosted on Windows. + + Fix attribute calculations in ARM toolchains. + + arm-linux support has been improved. + + Fix a PIC failure on sparc targets. + + On ix86 targets, the regparm attribute should now work + reliably. + + Several updates for the h8300 port. + + The whole suite has been extensively [2]regression tested and + [3]package tested. It should be reliable and suitable for widespread + use. + + The GCC 2.95 release has several new optimizations, new targets, new + languages and other new features as compared to EGCS 1.1 or GCC 2.8. + See the [4]new features page for a more complete list of new features + found in the GCC 2.95 releases. + + The sources include installation instructions in both HTML and + plaintext forms in the install directory in the distribution. However, + the most up to date [5]installation instructions and [6]build/test + status are on the web pages. We will update those pages as new + information becomes available. + + The GCC developers would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc to GCC. This + [7]amazing group of volunteers is what makes GCC successful. + + And finally, we can't in good conscience fail to mention some + [8]caveats to using GCC 2.95.3. + + Download GCC 2.95.3 from the [9]GNU FTP server (ftp://ftp.gnu.org) + Download GCC 2.95.3 from the [10]GCC FTP server (ftp://gcc.gnu.org) + [11]Find a GNU mirror site + [12]Find a GCC mirror site + + For additional information about GCC please see the [13]GCC project + web server or contact the [14]GCC development mailing list. + _________________________________________________________________ + + + [15]The GCC team + Last modified 2001-01-11 + +References + + 1. http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html + 2. http://gcc.gnu.org/gcc-2.95/regress.html + 3. http://gcc.gnu.org/gcc-2.95/othertest.html + 4. http://gcc.gnu.org/gcc-2.95/features.html + 5. http://gcc.gnu.org/install/index.html + 6. http://gcc.gnu.org/gcc-2.95/buildstat.html + 7. http://gcc.gnu.org/thanks.html + 8. http://gcc.gnu.org/gcc-2.95/caveats.html + 9. ftp://ftp.gnu.org/pub/gnu/gcc/ + 10. ftp://gcc.gnu.org/pub/gcc/releases/index.html + 11. http://www.gnu.org/order/ftp.html + 12. http://gcc.gnu.org/mirrors.html + 13. http://gcc.gnu.org/index.html + 14. mailto:gcc@gcc.gnu.org + 15. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html + + GCC 2.95.2 + + October 27, 1999 + + The GNU project and the GCC developers are pleased to announce the + release of GCC version 2.95.2. GCC used to stand for the GNU C + Compiler, but since the compiler supports several other languages + aside from C, it now stands for the GNU Compiler Collection. + + This is a minor release to address several bugs in the GCC version + 2.95.1 release. + + The -fstrict-aliasing is not enabled by default for GCC 2.95.2. While + the optimizations performed by -fstrict-aliasing are valid according + to the C and C++ standards, the optimization have caused some + problems, particularly with old non-conforming code. + + The GCC developers are experimenting with ways to warn users about + code which violates the C/C++ standards, but those warnings are not + ready for widespread use at this time. Rather than wait for those + warnings the GCC developers have chosen to disable -fstrict-aliasing + by default for the GCC 2.95.2 release. + + We strongly encourage developers to find and fix code which violates + the C/C++ standards as -fstrict-aliasing may be enabled by default in + future releases. Use the option -fstrict-aliasing to re-enable these + optimizations. + + * Generic bugfixes and improvements + + Fix incorrectly optimized memory reference in global common + subexpression elimination (GCSE) optimization pass. + + Fix code generation bug in regmove.c in which it could + incorrectly change a "const" value. + + Fix bug in optimization of conditionals involving volatile + memory references. + + Avoid over-allocation of stack space for some procedures. + + Fixed bug in the compiler which caused incorrect optimization + of an obscure series of bit manipulations, shifts and + arithmetic. + + Fixed register allocator bug which caused teTeX to be + mis-compiled on Sparc targets. + + Avoid incorrect optimization of degenerate case statements + for certain targets such as the ARM. + + Fix out of range memory reference in the jump optimizer. + + Avoid dereferencing null pointer in fix-header. + + Fix test for GCC specific features so that it is possible to + bootstrap with gcc-2.6.2 and older versions of GCC. + + Fix typo in scheduler which could potentially cause out of + range memory accesses. + + Avoid incorrect loop reversal which caused incorrect code for + certain loops on PowerPC targets. + + Avoid incorrect optimization of switch statements on certain + targets (for example the ARM). + * Platform specific bugfixes and improvements + + Work around bug in Sun V5.0 compilers which caused bootstrap + comparison failures on Sparc targets. + + Fix Sparc backend bug which caused aborts in final.c. + + Fix sparc-hal-solaris2* configuration fragments. + + Fix bug in sparc block profiling. + + Fix obscure code generation bug for the PARISC targets. + + Define __STDC_EXT__ for HPUX configurations. + + Various POWERPC64 code generation bugfixes. + + Fix abort for PPC targets using ELF (ex GNU/Linux). + + Fix collect2 problems for AIX targets. + + Correct handling of .file directive for PPC targets. + + Fix bug in fix_trunc x86 patterns. + + Fix x86 port to correctly pop the FP stack for functions that + return structures in memory. + + Fix minor bug in strlen x86 pattern. + + Use stabs debugging instead of dwarf1 for x86-solaris + targets. + + Fix template repository code to handle leading underscore in + mangled names. + + Fix weak/weak alias support for OpenBSD. + + GNU/Linux for the ARM has C++ compatible include files. + * Language & Runtime specific fixes. + + Fix handling of constructor attribute in the C front-end + which caused problems building the Chill runtime library on + some targets. + + Fix minor problem merging type qualifiers in the C front-end. + + Fix aliasing bug for pointers and references (C/C++). + + Fix incorrect "non-constant initializer bug" when + -traditional or -fwritable-strings is enabled. + + Fix build error for Chill front-end on SunOS. + + Do not complain about duplicate instantiations when using + -frepo (C++) + + Fix array bounds handling in C++ front-end which caused + problems with dwarf debugging information in some + circumstances. + + Fix minor namespace problem. + + Fix problem linking java programs. + + The whole suite has been extensively [1]regression tested and + [2]package tested. It should be reliable and suitable for widespread + use. + + The GCC 2.95 release has several new optimizations, new targets, new + languages and other new features as compared to EGCS 1.1 or GCC 2.8. + See the [3]new features page for a more complete list of new features + found in the GCC 2.95 releases. + + The sources include installation instructions in both HTML and + plaintext forms in the install directory in the distribution. However, + the most up to date [4]installation instructions and [5]build/test + status are on the web pages. We will update those pages as new + information becomes available. + + The GCC developers would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc to GCC. This + [6]amazing group of volunteers is what makes GCC successful. + + And finally, we can't in good conscience fail to mention some + [7]caveats to using GCC 2.95.2. + + Download GCC 2.95.2 from the [8]GNU FTP server (ftp://ftp.gnu.org) + Download GCC 2.95.2 from the [9]GCC/EGCS FTP server + (ftp://gcc.gnu.org) + [10]Find a GNU mirror site + [11]Find a GCC/EGCS mirror site + + For additional information about GCC please see the [12]GCC project + web server or contact the [13]GCC development mailing list. + _________________________________________________________________ + + + [14]The GCC team + Last modified 2000-11-10 + +References + + 1. http://gcc.gnu.org/gcc-2.95/regress.html + 2. http://gcc.gnu.org/gcc-2.95/othertest.html + 3. http://gcc.gnu.org/gcc-2.95/features.html + 4. http://gcc.gnu.org/install/index.html + 5. http://gcc.gnu.org/gcc-2.95/buildstat.html + 6. http://gcc.gnu.org/thanks.html + 7. http://gcc.gnu.org/gcc-2.95/caveats.html + 8. ftp://ftp.gnu.org/pub/gnu/gcc/ + 9. ftp://gcc.gnu.org/pub/gcc/releases/index.html + 10. http://www.gnu.org/order/ftp.html + 11. http://gcc.gnu.org/mirrors.html + 12. http://gcc.gnu.org/index.html + 13. mailto:gcc@gcc.gnu.org + 14. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/gcc-2.95/gcc-2.95.1.html + + GCC 2.95.1 + + August 19, 1999 + + The GNU project and the GCC/EGCS developers are pleased to announce + the release of GCC version 2.95.1. GCC used to stand for the GNU C + Compiler, but since the compiler supports several other languages + aside from C, it now stands for the GNU Compiler Collection. + + This is a minor release to address several bugs in the GCC version + 2.95 release. + + * Generic bugfixes and improvements + + Various documentation fixes related to the GCC/EGCS merger. + + Fix memory management bug which could lead to spurious + aborts, core dumps or random parsing errors in the compiler. + + Fix a couple bugs in the dwarf1 and dwarf2 debug record + support. + + Fix infinite loop in the CSE optimizer. + + Avoid undefined behavior in compiler FP emulation code + + Fix install problem when prefix is overridden on the make + install command. + + Fix problem with unwanted installation of assert.h on some + systems. + + Fix problem with finding the wrong assembler in a single tree + build. + + Avoid increasing the known alignment of a register that is + already known to be a pointer. + * Platform specific bugfixes and improvements + + Codegen bugfix for prologue/epilogue for cpu32 target. + + Fix long long code generation bug for the Coldfire target. + + Fix various aborts in the SH compiler. + + Fix bugs in libgcc support library for the SH. + + Fix alpha ev6 code generation bug. + + Fix problems with EXIT_SUCCESS/EXIT_FAILURE redefinitions on + AIX platforms. + + Fix -fpic code generation bug for rs6000/ppc svr4 targets. + + Fix varargs/stdarg code generation bug for rs6000/ppc svr4 + targets. + + Fix weak symbol handling for rs6000/ppc svr4 targets. + + Fix various problems with 64bit code generation for the + rs6000/ppc port. + + Fix codegen bug which caused tetex to be mis-compiled on the + x86 + + Fix compiler abort in new cfg code exposed by x86 port. + + Fix out of range array reference in code convert flat + registers to the x87 stacked FP register file. + + Fix minor vxworks configuration bug + + Fix return type of bsearch for SunOS 4.x. + * Language & Runtime specific fixes. + + The G++ signature extension has been deprecated. It will be + removed in the next major release of G++. Use of signatures + will result in a warning from the compiler. + + Several bugs relating to templates and namespaces were fixed. + + A bug that caused crashes when combining templates with -g on + DWARF1 platforms was fixed. + + Pointers-to-members, virtual functions, and multiple + inheritance should now work together correctly. + + Some code-generation bugs relating to function try blocks + were fixed. + + G++ is a little bit more lenient with certain archaic + constructs than in GCC 2.95. + + Fix to prevent shared library version #s from bring truncated + to 1 digit + + Fix missing std:: in the libstdc++ library. + + Fix stream locking problems in libio. + + Fix problem in java compiler driver. + + The whole suite has been extensively [1]regression tested and + [2]package tested. It should be reliable and suitable for widespread + use. + + The compiler has several new optimizations, new targets, new languages + and other new features. See the [3]new features page for a more + complete list of new features found in the GCC 2.95 releases. + + The sources include installation instructions in both HTML and + plaintext forms in the install directory in the distribution. However, + the most up to date [4]installation instructions and [5]build/test + status are on the web pages. We will update those pages as new + information becomes available. + + The GCC developers would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc to GCC. This + [6]amazing group of volunteers is what makes GCC successful. + + And finally, we can't in good conscience fail to mention some + [7]caveats to using GCC 2.95.1. + + Download GCC 2.95.1 from the [8]GNU FTP server (ftp://ftp.gnu.org) + Download GCC 2.95.1 from the [9]GCC/EGCS FTP server + (ftp://go.cygnus.com) + [10]Find a GNU mirror site + [11]Find a GCC/EGCS mirror site + + For additional information about GCC please see the [12]GCC project + web server or contact the [13]GCC development mailing list. + _________________________________________________________________ + + + [14]The GCC team + Last modified 2000-11-10 + +References + + 1. http://gcc.gnu.org/gcc-2.95/regress.html + 2. http://gcc.gnu.org/gcc-2.95/othertest.html + 3. http://gcc.gnu.org/gcc-2.95/features.html + 4. http://gcc.gnu.org/install/index.html + 5. http://gcc.gnu.org/gcc-2.95/buildstat.html + 6. http://gcc.gnu.org/thanks.html + 7. http://gcc.gnu.org/gcc-2.95/caveats.html + 8. ftp://ftp.gnu.org/pub/gnu/gcc/ + 9. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 10. http://www.gnu.org/order/ftp.html + 11. http://gcc.gnu.org/mirrors.html + 12. http://gcc.gnu.org/index.html + 13. mailto:gcc@gcc.gnu.org + 14. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/gcc-2.95/gcc-2.95.html + + GCC 2.95 + + July 31, 1999 + + The GNU project and the GCC/EGCS developers are pleased to announce + the release of GCC version 2.95. GCC used to stand for the GNU C + Compiler, but since the compiler supports several other languages + aside from C, it now stands for the GNU Compiler Collection. + + This is the first release of GCC since the April 1999 GCC/EGCS + reunification and includes nearly a year's worth of new development + and bugfixes. + + The whole suite has been extensively [1]regression tested and + [2]package tested. It should be reliable and suitable for widespread + use. + + The compiler has several new optimizations, new targets, new languages + and other new features. See the [3]new features page for a more + complete list of new features found in the GCC 2.95 releases. + + The sources include installation instructions in both HTML and + plaintext forms in the install directory in the distribution. However, + the most up to date [4]installation instructions and [5]build/test + status are on the web pages. We will update those pages as new + information becomes available. + + The GCC developers would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc to GCC. This + [6]amazing group of volunteers is what makes GCC successful. + + And finally, we can't in good conscience fail to mention some + [7]caveats to using GCC 2.95. + + Download GCC 2.95 from the [8]GNU FTP server (ftp://ftp.gnu.org) + Download GCC 2.95 from the [9]GCC/EGCS FTP server + (ftp://go.cygnus.com) + [10]Find a GNU mirror site + [11]Find a GCC/EGCS mirror site + + For additional information about GCC please see the [12]GCC project + web server or contact the [13]GCC development mailing list. + _________________________________________________________________ + + + [14]The GCC team + Last modified 2000-11-10 + +References + + 1. http://gcc.gnu.org/gcc-2.95/regress.html + 2. http://gcc.gnu.org/gcc-2.95/othertest.html + 3. http://gcc.gnu.org/gcc-2.95/features.html + 4. http://gcc.gnu.org/install/index.html + 5. http://gcc.gnu.org/gcc-2.95/buildstat.html + 6. http://gcc.gnu.org/thanks.html + 7. http://gcc.gnu.org/gcc-2.95/caveats.html + 8. ftp://ftp.gnu.org/pub/gnu/gcc/ + 9. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 10. http://www.gnu.org/order/ftp.html + 11. http://gcc.gnu.org/mirrors.html + 12. http://gcc.gnu.org/index.html + 13. mailto:gcc@gcc.gnu.org + 14. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/gcc-2.95/features.html + + GCC 2.95 New Features + + * General Optimizer Improvements: + + [1]Localized register spilling to improve speed and code + density especially on small register class machines. + + [2]Global CSE using lazy code motion algorithms. + + [3]Improved global constant/copy propagation. + + [4]Improved control flow graph analysis and manipulation. + + [5]Local dead store elimination. + + [6]Memory Load hoisting/store sinking in loops. + + [7]Type based alias analysis is enabled by default. Note this + feature will expose bugs in the Linux kernel. Please refer to + the [8]FAQ for additional information on this issue. + + Major revamp of GIV detection, combination and simplification + to improve loop performance. + + Major improvements to register allocation and reloading. + * New Languages and Language specific improvements + + [9]Many C++ improvements. + + [10]Many Fortran improvements. + + [11]Java front-end has been integrated. A [12]runtime library + is available separately. + + [13]ISO C99 support + + [14]Chill front-end and runtime has been integrated. + + Boehm garbage collector support in libobjc. + + More support for various pragmas which appear in vendor + include files + * New Targets and Target Specific Improvements + + [15]Sparc backend rewrite. + + -mschedule=8000 will optimize code for PA8000 class + processors; -mpa-risc-2-0 will generate code for PA2.0 + processors + + Various micro-optimizations for the ia32 port. K6 + optimizations + + Compiler will attempt to align doubles in the stack on the + ia32 port + + Alpha EV6 support + + PowerPC 750 + + RS6000/PowerPC: -mcpu=401 was added as an alias for + -mcpu=403. -mcpu=e603e was added to do -mcpu=603e and + -msoft-float. + + c3x, c4x + + HyperSparc + + SparcLite86x + + sh4 + + Support for new systems (OpenBSD, FreeBSD, UWIN, Interix, + arm-linux) + + vxWorks targets include support for vxWorks threads + + StrongARM 110 and ARM9 support added. ARM Scheduling + parameters rewritten. + + Various changes to the MIPS port to avoid assembler macros, + which + + Various performance improvements to the i960 port. + + Major rewrite of ns32k port in turn improves performance + * Other significant improvements + + [16]Ability to dump cfg information and display it using vcg. + + The new faster scheme for fixing vendor header files is + enabled by default. + + Experimental internationalization support. + + multibyte character support + + Some compile-time speedups for pathological problems + + Better support for complex types + * Plus the usual mountain of bugfixes + * Core compiler is based on the gcc2 development tree from Sept 30, + 1998, so we have all of the [17]features found in GCC 2.8. + _________________________________________________________________ + + + [18]The GCC team + Last modified 2000-12-04 + +References + + 1. http://gcc.gnu.org/news/spill.html + 2. http://gcc.gnu.org/news/lcm.html + 3. http://gcc.gnu.org/news/cprop.html + 4. http://gcc.gnu.org/news/cfg.html + 5. http://gcc.gnu.org/news/dse.html + 6. http://gcc.gnu.org/news/hoist.html + 7. http://gcc.gnu.org/news/alias.html + 8. http://gcc.gnu.org/fom_serv/cache/24.html + 9. http://gcc.gnu.org/gcc-2.95/c++features.html + 10. http://gcc.gnu.org/onlinedocs/g77_news.html + 11. http://sources.redhat.com/java/gcj-announce.txt + 12. http://gcc.gnu.org/javaannounce.html + 13. http://gcc.gnu.org/c99status.html + 14. http://gcc.gnu.org/news/chill.html + 15. http://gcc.gnu.org/news/sparc.html + 16. http://gcc.gnu.org/news/egcs-vcg.html + 17. http://gcc.gnu.org/egcs-1.0/features-2.8.html + 18. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/gcc-2.95/caveats.html + + GCC 2.95 Caveats + + * GCC 2.95 will issue an error for invalid asm statements that had + been silently accepted by earlier versions of the compiler. This + is particularly noticeable when compiling older versions of the + Linux kernel (2.0.xx). Please refer to the [1]FAQ for more + information on this issue. + * GCC 2.95 implements type based alias analysis to disambiguate + memory references. Some programs, particularly the Linux kernel + violate ANSI/ISO aliasing rules and therefore may not operate + correctly when compiled with GCC 2.95. Please refer to the [2]FAQ + for more information on this issue. + * GCC 2.95 has a known bug in its handling of complex variables for + 64bit targets. Instead of silently generating incorrect code, GCC + 2.95 will issue a fatal error for situations it can not handle. + This primarily affects the Fortran community as Fortran makes more + use of complex variables than C or C++. + * GCC 2.95 has an integrated libstdc++, but does not have an + integrated libg++. Furthermore old libg++ releases will not work + with GCC 2.95. You can retrieve a recent copy of libg++ from the + [3]GCC ftp server. + Note most C++ programs only need libstdc++. + * Exception handling may not work with shared libraries, + particularly on alphas, hppas, rs6000/powerpc and mips based + platforms. Exception handling is known to work on x86 GNU/Linux + platforms with shared libraries. + * In general, GCC 2.95 is more rigorous about rejecting invalid C++ + code or deprecated C++ constructs than G++ 2.7, G++ 2.8, EGCS 1.0, + or EGCS 1.1. As a result it may be necessary to fix C++ code + before it will compile with GCC 2.95. + * G++ is also converting toward the ISO C++ standard; as a result + code which was previously valid (and thus accepted by other + compilers and older versions of g++) may no longer be accepted. + The flag -fpermissive may allow some non-conforming code to + compile with GCC 2.95. + * GCC 2.95 compiled C++ code is not binary compatible with EGCS + 1.1.x, EGCS 1.0.x or GCC 2.8.x. + * GCC 2.95 does not have changes from the GCC 2.8 tree that were + made between Sept 30, 1998 and April 30, 1999 (the official end of + the GCC 2.8 project). Future GCC releases will include all the + changes from the defunct GCC 2.8 sources. + _________________________________________________________________ + + + [4]The GCC team + Last modified 2000-11-10 + +References + + 1. http://gcc.gnu.org/faq.html#asmclobber + 2. http://gcc.gnu.org/fom_serv/cache/24.html + 3. ftp://gcc.gnu.org/pub/gcc/infrastructure/libg++-2.8.1.3.tar.gz + 4. http://gcc.gnu.org/about.html +====================================================================== +http://gcc.gnu.org/egcs-1.1/egcs-1.1.2.html + + EGCS 1.1.2 + + March 15, 1999 + + We are pleased to announce the release of EGCS 1.1.2. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + EGCS 1.1.2 is a minor update to the EGCS 1.1.1 compiler to fix several + serious problems in EGCS 1.1.1. + * General improvements and fixes + + Fix bug in loop optimizer which caused the SPARC (and + potentially other) ports to segfault. + + Fix infinite recursion in alias analysis and combiner code. + + Fix bug in regclass preferencing. + + Fix incorrect loop reversal which caused incorrect code to be + generated for several targets. + + Fix return value for builtin memcpy. + + Reduce compile time for certain loops which exposed quadratic + behavior in the loop optimizer. + + Fix bug which caused volatile memory to be written multiple + times when only one write was needed/desired. + + Fix compiler abort in caller-save.c + + Fix combiner bug which caused incorrect code generation for + certain division by constant operations. + + Fix incorrect code generation due to a bug in range check + optimizations. + + Fix incorrect code generation due to mis-handling of + clobbered values in CSE. + + Fix compiler abort/segfault due to incorrect register + splitting when unrolling loops. + + Fix code generation involving autoincremented addresses with + ternary operators. + + Work around bug in the scheduler which caused qt to be + mis-compiled on some platforms. + + Fix code generation problems with -fshort-enums. + + Tighten security for temporary files. + + Improve compile time for codes which make heavy use of + overloaded functions. + + Fix multiply defined constructor/destructor symbol problems. + + Avoid setting bogus RPATH environemnt variable during + bootstrap. + + Avoid GNU-make dependencies in the texinfo subdir. + + Install CPP wrapper script in $(prefix)/bin if --enable-cpp. + --enable-cpp= can be used to specify an additional install + directory for the cpp wrapper script. + + Fix CSE bug which caused incorrect label-label refs to appear + on some platforms. + + Avoid linking in EH routines from libgcc if they are not + needed. + + Avoid obscure bug in aliasing code. + + Fix bug in weak symbol handling. + * Platform-specific improvements and fixes + + Fix detection of PPro/PII on Unixware 7. + + Fix compiler segfault when building spec99 and other programs + for SPARC targets. + + Fix code-generation bugs for integer and floating point + conditional move instructions on the PPro/PII. + + Use fixincludes to fix byteorder problems on i?86-*-sysv. + + Fix build failure for the arc port. + + Fix floating point format configuration for i?86-gnu port + + Fix problems with hppa1.0-hp-hpux10.20 configuration when + threads are enabled + + Fix coldfire code generation bugs. + + Fix "unrecognized insn" problems for Alpha and PPC ports. + + Fix h8/300 code generation problem with floating point values + in memory. + + Fix unrecognized insn problems for the m68k port. + + Fix namespace-pollution problem for the x86 port. + + Fix problems with old assembler on x86 NeXT systems. + + Fix PIC code-generation problems for the SPARC port. + + Fix minor bug with LONG_CALLS in PowerPC SVR4 support. + + Fix minor ISO namespace violation in Alpha varargs/stdarg + support. + + Fix incorrect "braf" instruction usage for the SH port. + + Fix minor bug in va-sh which prevented its use with -ansi. + + Fix problems recognizing and supporting FreeBSD. + + Handle OpenBSD systems correctly. + + Minor fixincludes fix for Digital UNIX 4.0B. + + Fix problems with ctors/dtors in SCO shared libraries. + + Abort instead of generating incorrect code for PPro/PII + floating point conditional moves. + + Avoid multiply defined symbols on Linux/GNU systems using + libc-5.4.xx. + + Fix abort in alpha compiler. + + Fortran-specific fixes + * Fix the IDate intrinsic (VXT) (in libg2c) so the returned year is + in the documented, non-Y2K-compliant range of 0-99, instead of + being returned as 100 in the year 2000. + * Fix the `Date_and_Time' intrinsic (in libg2c) to return the + milliseconds value properly in Values(8). + * Fix the `LStat' intrinsic (in libg2c) to return device-ID + information properly in SArray(7). + + An important goal of EGCS is to allow wide scale testing of new + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most gcc releases. + + EGCS 1.1.2 is based on the June 6, 1998 snapshot of the GCC 2.8 + development sources; it contains all of the new features found in GCC + 2.8.1 as well as all new development from gcc2 up to June 6, 1998. + + See the [1]new features page for a more complete list of new features + found in EGCS 1.1 releases. + + The EGCS 1.1.2 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.1.2 distribution). However, we also keep the + most up to date [2]installation instructions and [3]build/test status + on our web page. We will update those pages as new information becomes + available. + + The EGCS project would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc. This [4]amazing + group of volunteers is what makes EGCS successful. + + And finally, we can't in good conscience fail to mention some + [5]caveats to using EGCS 1.1.2. [6]Download EGCS 1.1.2 from + egcs.cygnus.com (USA California) --> + + [7]Download EGCS 1.1.2 from go.cygnus.com (USA California - High speed + link provided by Stanford) + + The EGCS 1.1.2 release is also available on many [8]mirror sites. + _________________________________________________________________ + + Last modified on July 28, 1999. + +References + + 1. http://gcc.gnu.org/egcs-1.1/features.html + 2. http://gcc.gnu.org/install/index.html + 3. http://gcc.gnu.org/egcs-1.1/buildstat.html + 4. http://gcc.gnu.org/thanks.html + 5. http://gcc.gnu.org/egcs-1.1/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 8. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.1/egcs-1.1.1.html + + EGCS 1.1.1 + + December 1, 1998 + + We are pleased to announce the release of EGCS 1.1.1. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + EGCS 1.1.1 is a minor update to the EGCS 1.1 compiler to fix several + serious problems in EGCS 1.1. + * General improvements and fixes + + Avoid some stack overflows when compiling large functions. + + Avoid incorrect loop invariant code motions. + + Fix some core dumps on Linux kernel code. + + Bring back the imake -Di386 and friends fix from EGCS 1.0.2. + + Fix code generation problem in gcse. + + Various documentation related fixes. + * g++/libstdc++ improvements and fixes + + MT safe EH fix for setjmp/longjmp based exception handling. + + Fix a few bad interactions between optimization and exception + handling. + + Fixes for demangling of template names starting with "__". + + Fix a bug that would fail to run destructors in some cases + with -O2. + + Fix 'new' of classes with virtual bases. + + Fix crash building Qt on the Alpha. + + Fix failure compiling WIFEXITED macro on GNU/Linux. + + Fix some -frepo failures. + * g77 and libf2c improvements and fixes + + Various documentation fixes. + + Avoid compiler crash on RAND intrinsic. + + Fix minor bugs in makefiles exposed by BSD make programs. + + Define _XOPEN_SOURCE for libI77 build to avoid potential + problems on some 64-bit systems. + + Fix problem with implicit endfile on rewind. + + Fix spurious recursive I/O errors. + * platform specific improvements and fixes + + Match all versions of UnixWare7. + + Do not assume x86 SVR4 or UnixWare targets can handle stabs + + Fix PPC/RS6000 LEGITIMIZE_ADDRESS macro and bug in conversion + from unsigned ints to double precision floats. + + Fix ARM ABI issue with NetBSD. + + Fix a few arm code generation bugs. + + Fixincludes will fix additional broken SCO OpenServer header + files. + + Fix a m68k backend bug which caused invalid offsets in reg+d + addresses. + + Fix problems with 64bit AIX 4.3 support. + + Fix handling of long longs for varargs/stdarg functions on + the ppc. + + Minor fixes to CPP predefines for Windows. + + Fix code generation problems with gpr<->fpr copies for 64bit + ppc + + Fix a few coldfire code generation bugs. + + Fix some more header file problems on SunOS 4.x + + Fix assert.h handling for RTEMS. + + Fix Windows handling of TREE_SYMBOL_REFERENCED. + + Fix x86 compiler abort in reg-stack pass. + + Fix cygwin/windows problem with section attributes. + + Fix Alpha code generation problem exposed by SMP Linux + kernels. + + Fix typo in m68k 32->64bit integer conversion. + + Make sure target libraries build with -fPIC for PPC & Alpha + targets. + + An important goal of EGCS is to allow wide scale testing of new + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most gcc releases. + + EGCS 1.1.1 is based on the June 6, 1998 snapshot of the GCC 2.8 + development sources; it contains all of the new features found in GCC + 2.8.1 as well as all new development from gcc2 up to June 6, 1998. + + See the [1]new features page for a more complete list of new features + found in EGCS 1.1 releases. + + The EGCS 1.1.1 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.1.1 distribution). However, we also keep the + most up to date [2]installation instructions and [3]build/test status + on our web page. We will update those pages as new information becomes + available. + + The EGCS project would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc. This [4]amazing + group of volunteers is what makes EGCS successful. + + And finally, we can't in good conscience fail to mention some + [5]caveats to using EGCS 1.1.1. + + [6]Download EGCS 1.1.1 from egcs.cygnus.com (USA California) + + The EGCS 1.1.1 release is also available on many mirror sites. + [7]Goto mirror list to find a closer site + _________________________________________________________________ + + Last modified on July 28, 1999. + +References + + 1. http://gcc.gnu.org/egcs-1.1/features.html + 2. http://gcc.gnu.org/install/index.html + 3. http://gcc.gnu.org/egcs-1.1/buildstat.html + 4. http://gcc.gnu.org/thanks.html + 5. http://gcc.gnu.org/egcs-1.1/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.1/egcs-1.1.html + + EGCS 1.1 + + September 3, 1998 + + We are pleased to announce the release of EGCS 1.1. + + EGCS is a free software project to further the development of the GNU + compilers using an open development environment. + + EGCS 1.1 is a major new release of the EGCS compiler system. It has + been [1]extensively tested and is believed to be stable and suitable + for widespread use. + + EGCS 1.1 is based on an June 6, 1998 snapshot of the GCC 2.8 + development sources; it contains all of the new features found in GCC + 2.8.1 as well as all new development from GCC up to June 6, 1998. + + EGCS also contains many improvements and features not found in GCC or + in older versions of EGCS. + * Global common subexpression elimination and global constant/copy + propagation (aka [2]gcse) + * Ongoing improvements to the [3]alias analysis support to allow for + better optimizations throughout the compiler. + * Vastly improved [4]C++ compiler and integrated C++ runtime + libraries. + * Fixes for the /tmp symlink race security problems. + * New targets including mips16, arm-thumb and 64 bit PowerPC. + * Improvements to GNU Fortran (g77) compiler and runtime library + made since [5]g77 version 0.5.23. + + See the [6]new features page for a more complete list of new features + found in EGCS 1.1 releases. + + The EGCS 1.1 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.1 distribution). However, we also keep the + most up to date [7]installation instructions and [8]build/test status + on our web page. We will update those pages as new information becomes + available. + + The EGCS project would like to thank the numerous people that have + contributed new features, test results, bugfixes, etc. This [9]amazing + group of volunteers is what makes EGCS successful. + + And finally, we can't in good conscience fail to mention some + [10]caveats to using EGCS 1.1. + + [11]Download EGCS 1.1 from egcs.cygnus.com (USA California) + + [12]Download EGCS 1.1 from go.cygnus.com (USA California -- High speed + link provided by Stanford) + + The EGCS 1.1 release is also available on many mirror sites. + [13]Goto mirror list to find a closer site + _________________________________________________________________ + + Last modified on September 4, 1999. + +References + + 1. http://gcc.gnu.org/egcs-1.1/egcs-1.1-test.html + 2. http://gcc.gnu.org/news/gcse.html + 3. http://gcc.gnu.org/news/alias.html + 4. http://gcc.gnu.org/egcs-1.1/c++features.html + 5. http://gcc.gnu.org/onlinedocs/g77_news.html + 6. http://gcc.gnu.org/egcs-1.1/features.html + 7. http://gcc.gnu.org/install/index.html + 8. http://gcc.gnu.org/egcs-1.1/buildstat.html + 9. http://gcc.gnu.org/thanks.html + 10. http://gcc.gnu.org/egcs-1.1/caveats.html + 11. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 12. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 13. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.1/features.html + + EGCS 1.1 new features + + * Integrated GNU Fortran (g77) compiler and runtime library with + improvements, based on [1]g77 version 0.5.23. + * Vast improvements in the C++ compiler; so many they have [2]page + of their own! + * Compiler implements [3]global common subexpression elimination and + global copy/constant propagation. + * More major improvements in the [4]alias analysis code. + * More major improvements in the exception handling code to improve + performance, lower static overhead and provide the infrastructure + for future improvements. + * The infamous /tmp symlink race security problems have been fixed. + * The regmove optimization pass has been nearly completely rewritten + to improve performance of generated code. + * The compiler now recomputes register usage information before + local register allocation. By providing more accurate information + to the priority based allocator, we get better register + allocation. + * The register reloading phase of the compiler optimizes spill code + much better than in previous releases. + * Some bad interactions between the register allocator and + instruction scheduler have been fixed, resulting in much better + code for certain programs. Additionally, we have tuned the + scheduler in various ways to improve performance of generated code + for some architectures. + * The compiler's branch shortening algorithms have been + significantly improved to work better on targets which align jump + targets. + * The compiler now supports -Os to prefer optimizing for code space + over optimizing for code speed. + * The compiler will now totally eliminate library calls which + compute constant values. This primarily helps targets with no + integer div/mul support and targets without floating point + support. + * The compiler now supports an extensive "--help" option. + * cpplib has been greatly improved and may be suitable for limited + use. + * Memory footprint for the compiler has been significantly reduced + for some pathological cases. + * The time to build EGCS has been improved for certain targets + (particularly the alpha and mips platforms). + * Many infrastructure improvements throughout the compiler, plus the + usual mountain of bugfixes and minor improvements. + * Target dependent improvements: + + SPARC port now includes V8 plus and V9 support as well as + performance tuning for Ultra class machines. The SPARC port + now uses the Haifa scheduler. + + Alpha port has been tuned for the EV6 processor and has an + optimized expansion of memcpy/bzero. The Alpha port now uses + the Haifa scheduler. + + RS6000/PowerPC: EGCS 1.1 includes support for the Power64 + architecture and aix4.3 support. The RS6000/PowerPC port now + uses the Haifa scheduler. + + x86: Alignment of static store data and jump targets is per + Intel recommendations now. Various improvements throughout + the x86 port to improve performance on Pentium processors. + Conditional move support has been fixed and enabled for PPro + processors. The x86 port also better supports 64bit + operations now. + + MIPS has improved multiply/multiply-add support and now + includes mips16 ISA support. + + M68k has many micro-optimizations and Coldfire fixes. + * Core compiler is based on the GCC development tree from June 9, + 1998, so we have all of the [5]features found in GCC 2.8. + + [6]Return to the EGCS home page + + Last modified: September 4, 1999 + +References + + 1. http://gcc.gnu.org/onlinedocs/g77_news.html + 2. http://gcc.gnu.org/egcs-1.1/c++features.html + 3. http://gcc.gnu.org/news/gcse.html + 4. http://gcc.gnu.org/news/alias.html + 5. http://gcc.gnu.org/egcs-1.0/features-2.8.html + 6. http://gcc.gnu.org/index.html +====================================================================== +http://gcc.gnu.org/egcs-1.1/caveats.html + + EGCS 1.1 Caveats + + * EGCS has an integrated libstdc++, but does not have an integrated + libg++. Furthermore old libg++ releases will not work with EGCS; + HJ Lu has made a [1]libg++ snapshot available which may work with + EGCS. + Note most C++ programs only need libstdc++. + * Exception handling may not work with shared libraries, + particularly on alphas, hppas, rs6000/powerpc and mips based + platforms. Exception handling is known to work on x86-linux + platforms with shared libraries. + * Some versions of the Linux kernel have bugs which prevent them + from being compiled or from running when compiled by EGCS. See + [2]the FAQ for additional information. + * In general, EGCS is more rigorous about rejecting invalid C++ code + or deprecated C++ constructs than g++-2.7, g++-2.8 or EGCS 1.0. As + a result it may be necessary to fix C++ code before it will + compile with EGCS. + * G++ is also converting toward the ISO C++ standard; as a result + code which was previously valid (and thus accepted by other + compilers and older versions of g++) may no longer be accepted. + * EGCS 1.1 compiled C++ code is not binary compatible with EGCS + 1.0.x or GCC 2.8.x due to changes necessary to support thread safe + exception handling. + + [3]Return to the GCC home page + + Last modified: July 28, 1999 + +References + + 1. ftp://ftp.yggdrasil.com/private/hjl/libg++-2.8.1.2.tar.gz + 2. http://gcc.gnu.org/fom_serv/cache/24.html + 3. http://gcc.gnu.org/index.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/egcs-1.0.3.html + + EGCS 1.0.3 + + May 15, 1998 + + We are pleased to announce the release of EGCS 1.0.3. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + EGCS 1.0.3 is a minor update to the EGCS 1.0.2 compiler to fix a few + problems reported by Red Hat for builds of Red Hat 5.1. + * Generic bugfixes: + + Fix a typo in the libio library which resulted in incorrect + behavior of istream::get. + + Fix the Fortran negative array index problem. + + Fix a major problem with the ObjC runtime thread support + exposed by glibc2. + + Reduce memory consumption of the Haifa scheduler. + * Target specific bugfixes: + + Fix one x86 floating point code generation bug exposed by + glibc2 builds. + + Fix one x86 internal compiler error exposed by glibc2 builds. + + Fix profiling bugs on the Alpha. + + Fix ImageMagick & emacs 20.2 build problems on the Alpha. + + Fix rs6000/ppc bug when converting values from integer types + to floating point types. + + An important goal of EGCS is to allow wide scale testing of new + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most GCC releases. + + EGCS 1.0.3 is based on an August 2, 1997 snapshot of the GCC 2.8 + development sources; it contains nearly all of the new features found + in GCC 2.8. + + EGCS also contains many improvements and features not found in GCC 2.7 + or GCC 2.8. + * Integrated C++ runtime libraries, including support for most major + GNU/Linux systems! + * The integrated libstdc++ library includes a verbatim copy of + [1]SGI's STL release instead of a modified copy. + * Integrated GNU Fortran compiler + * New instruction scheduler + * New alias analysis code + + See the [2]new features page for a more complete list of new features + found in EGCS 1.0.x releases. + + The EGCS 1.0.3 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.0.3 distribution). However, we also keep the + most up to date [3]installation instructions and [4]build/test status + on our web page. We will update those pages as new information becomes + available. + + And, we can't in good conscience fail to mention some [5]caveats to + using EGCS. + + Update: Big thanks to Stanford for providing a high speed link for + downloading EGCS (go.cygnus.com)! + + [6]Download EGCS 1.0.3 from ftp.cygnus.com (USA California) + + [7]Download EGCS 1.0.3 from go.cygnus.com (USA California -- High + speed link provided by Stanford) + + The EGCS 1.0.3 release is also available on many mirror sites. + [8]Goto mirror list to find a closer site + + We'd like to thank the numerous people that have contributed new + features, test results, bugfixes, etc. Unfortunately, they're far too + numerous to mention by name. + _________________________________________________________________ + + Last modified on February 22, 1999. + +References + + 1. http://www.sgi.com/Technology/STL + 2. http://gcc.gnu.org/egcs-1.0/features.html + 3. http://gcc.gnu.org/install/index.html + 4. http://gcc.gnu.org/egcs-1.0/buildstat.html + 5. http://gcc.gnu.org/egcs-1.0/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 8. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/egcs-1.0.2.html + + EGCS 1.0.2 + + March 16, 1998 + + We are pleased to announce the release of EGCS 1.0.2. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + EGCS 1.0.2 is a minor update to the EGCS 1.0.1 compiler to fix several + serious problems in EGCS 1.0.1. + * General improvements and fixes + + Memory consumption significantly reduced, especially for + templates and inline functions. + + Fix various problems with glibc2.1. + + Fix loop optimization bug exposed by rs6000/ppc port. + + Fix to avoid potential code generation problems in jump.c. + + Fix some undefined symbol problems in dwarf1 debug support. + * g++/libstdc++ improvements and fixes + + libstdc++ in the EGCS release has been updated and should be + link compatible with libstdc++-2.8. + + Various fixes in libio/libstdc++ to work better on Linux + systems. + + Fix problems with duplicate symbols on systems that do not + support weak symbols. + + Memory corruption bug and undefined symbols in bastring have + been fixed. + + Various exception handling fixes. + + Fix compiler abort for very long thunk names. + * g77 improvements and fixes + + Fix compiler crash for omitted bound in Fortran CASE + statement. + + Add missing entries to g77 lang-options. + + Fix problem with -fpedantic in the g77 compiler. + + Fix "backspace" problem with g77 on alphas. + + Fix x86 backend problem with Fortran literals and -fpic. + + Fix some of the problems with negative subscripts for g77 on + alphas. + + Fixes for Fortran builds on cygwin32/mingw32. + * platform specific improvements and fixes + + Fix long double problems on x86 (exposed by glibc) + + x86 ports define i386 again to keep imake happy. + + Fix exception handling support on NetBSD ports. + + Several changes to collect2 to fix many problems with AIX. + + Define __ELF__ for rs6000/linux. + + Fix -mcall-linux problem on rs6000/linux. + + Fix stdarg/vararg problem for rs6000/linux. + + Allow autoconf to select a proper install problem on AIX 3.1. + + m68k port support includes -mcpu32 option as well as cpu32 + multilibs. + + Fix stdarg bug for irix6. + + Allow EGCS to build on irix5 without the gnu assembler. + + Fix problem with static linking on sco5. + + Fix bootstrap on sco5 with native compiler. + + Fix for abort building newlib on H8 target. + + Fix fixincludes handling of math.h on SunOS. + + Minor fix for motorola 3300 m68k systems. + + An important goal of EGCS is to allow wide scale testing of new + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most GCC releases. + + EGCS 1.0.2 is based on an August 2, 1997 snapshot of the GCC 2.8 + development sources; it contains nearly all of the new features found + in GCC 2.8. + + EGCS also contains many improvements and features not found in GCC 2.7 + or GCC 2.8. + * Integrated C++ runtime libraries, including support for most major + linux systems! + * The integrated libstdc++ library includes a verbatim copy of + [1]SGI's STL release. + * Integrated GNU Fortran compiler + * New instruction scheduler + * New alias analysis code + + See the [2]new features page for a more complete list of new features + found in EGCS 1.0.x releases. + + The EGCS 1.0.2 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.0.2 distribution). However, we also keep the + most up to date [3]installation instructions and [4]build/test status + on our web page. We will update those pages as new information becomes + available. + + And, we can't in good conscience fail to mention some [5]caveats to + using EGCS. + + Update: Big thanks to Stanford for providing a high speed link for + downloading EGCS (go.cygnus.com)! + + [6]Download EGCS 1.0.2 from ftp.cygnus.com (USA California) + + [7]Download EGCS 1.0.2 from go.cygnus.com (USA California -- High + speed link provided by Stanford) + + The EGCS 1.0.2 release is also available on many mirror sites. + [8]Goto mirror list to find a closer site + + We'd like to thank the numerous people that have contributed new + features, test results, bugfixes, etc. Unfortunately, they're far too + numerous to mention by name. + _________________________________________________________________ + + Last modified on July 28, 1999. + +References + + 1. http://www.sgi.com/Technology/STL/ + 2. http://gcc.gnu.org/egcs-1.0/features.html + 3. http://gcc.gnu.org/install/index.html + 4. http://gcc.gnu.org/egcs-1.0/buildstat.html + 5. http://gcc.gnu.org/egcs-1.0/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 8. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/egcs-1.0.1.html + + EGCS 1.0.1 + + January 6, 1998 + + We are pleased to announce the release of EGCS 1.0.1. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + EGCS 1.0.1 is a minor update to the EGCS 1.0 compiler to fix a few + critical bugs and add support for Red Hat 5.0 Linux. Changes since the + EGCS 1.0 release: + * Add support for Red Hat 5.0 Linux and better support for Linux + systems using glibc2. + Many programs failed to link when compiled with EGCS 1.0 on Red + Hat 5.0 or on systems with newer versions of glibc2. EGCS 1.0.1 + should fix these problems. + * Compatability with both EGCS 1.0 and GCC 2.8 libgcc exception + handling interfaces. + To avoid future compatibility problems, we strongly urge anyone + who is planning on distributing shared libraries that contain C++ + code to upgrade to EGCS 1.0.1 first. + Soon after EGCS 1.0 was released, the GCC developers made some + incompatible changes in libgcc's exception handling interfaces. + These changes were needed to solve problems on some platforms. + This means that GCC 2.8.0, when released, will not be seamlessly + compatible with shared libraries built by EGCS 1.0. The reason is + that the libgcc.a in GCC 2.8.0 will not contain a function needed + by the old interface. + The result of this is that there may be compatibility problems + with shared libraries built by EGCS 1.0 when used with GCC 2.8.0. + With EGCS 1.0.1, generated code uses the new (GCC 2.8.0) + interface, and libgcc.a has the support routines for both the old + and the new interfaces (so EGCS 1.0.1 and EGCS 1.0 code can be + freely mixed, and EGCS 1.0.1 and GCC 2.8.0 code can be freely + mixed). + The maintainers of GCC 2.x have decided against including seamless + support for the old interface in 2.8.0, since it was never + "official", so to avoid future compatibility problems we recommend + against distributing any shared libraries built by EGCS 1.0 that + contain C++ code (upgrade to 1.0.1 and use that). + * Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends. + The x86 changes fix code generation errors exposed when building + glibc2 and the Linux dynamic linker (ld.so). + The hppa change fixes a compiler abort when configured for use + with RTEMS. + The MIPS changes fix problems with the definition of LONG_MAX on + newer systems, allow for command line selection of the target ABI, + and fix one code generation problem. + The rs6000/ppc change fixes some problems with passing structures + to varargs/stdarg functions. + * A few machine independent bugfixes, mostly to fix code generation + errors when building Linux kernels or glibc. + * Fix a few critical exception handling and template bugs in the C++ + compiler. + * Fix Fortran namelist bug on alphas. + * Fix build problems on x86-solaris systems. + + An important goal of EGCS is to allow wide scale testing of new + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most GCC releases. + + EGCS 1.0.1 is based on an August 2, 1997 snapshot of the GCC 2.8 + development sources; it contains nearly all of the new features found + in GCC 2.8. + + EGCS also contains many improvements and features not found in GCC 2.7 + and even the soon to be released GCC 2.8 compilers. + * Integrated C++ runtime libraries, including support for most major + linux systems! + * The integrated libstdc++ library includes a verbatim copy of + [1]SGI's STL release. + * Integrated GNU Fortran compiler + * New instruction scheduler + * New alias analysis code + + See the [2]new features page for a more complete list of new features + found in EGCS 1.0.x releases. + + The EGCS 1.0.1 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.0.1 distribution). However, we also keep the + most up to date [3]installation instructions and [4]build/test status + on our web page. We will update those pages as new information becomes + available. + + And, we can't in good conscience fail to mention some [5]caveats to + using EGCS. + + Update: Big thanks to Stanford for providing a high speed link for + downloading EGCS (go.cygnus.com)! + + [6]Download EGCS 1.0.1 from ftp.cygnus.com (USA California) + + [7]Download EGCS 1.0.1 from go.cygnus.com (USA California -- High + speed link provided by Stanford) + + The EGCS 1.0.1 release is also available on many mirror sites. + [8]Goto mirror list to find a closer site + + We'd like to thank the numerous people that have contributed new + features, test results, bugfixes, etc. Unfortunately, they're far too + numerous to mention by name. + _________________________________________________________________ + + Last modified on July 28, 1999. + +References + + 1. http://www.sgi.com/Technology/STL/ + 2. http://gcc.gnu.org/egcs-1.0/features.html + 3. http://gcc.gnu.org/install/index.html + 4. http://gcc.gnu.org/egcs-1.0/buildstat.html + 5. http://gcc.gnu.org/egcs-1.0/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 8. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/egcs-1.0.html + + EGCS 1.0 + + December 3, 1997 + + We are pleased to announce the release of EGCS 1.0. + + EGCS is a collaborative effort involving several groups of hackers + using an open development model to accelerate development and testing + of GNU compilers and runtime libraries. + + An important goal of EGCS is to allow wide scale testing of + experimental features and optimizations; therefore, EGCS contains some + features and optimizations which are still under development. However, + EGCS has been carefully tested and should be comparable in quality to + most GCC releases. + + EGCS 1.0 is based on an August 2, 1997 snapshot of the GCC 2.8 + development sources; it contains nearly all of the new features found + in GCC 2.8. + + EGCS 1.0 also contains many improvements and features not found in GCC + 2.7 and even the soon to be released GCC 2.8 compilers. + * Integrated C++ runtime libraries, including support for most major + linux systems! + * The integrated libstdc++ library includes a verbatim copy of + [1]SGI's STL release. + * Integrated GNU Fortran compiler + * New instruction scheduler + * New alias analysis code + + See the [2]new features page for a more complete list of new features. + + The EGCS 1.0 release includes installation instructions in both HTML + and plaintext forms (see the INSTALL directory in the toplevel + directory of the EGCS 1.0 distribution). However, we also keep the + most up to date [3]installation instructions and [4]build/test status + on our web page. We will update those pages as new information becomes + available. + + And, we can't in good conscience fail to mention some [5]caveats to + using EGCS. + + Update: The T1 into our main California offices has been 100% + saturated since shortly after the release. We've added an EGCS 1.0 + mirror at our Massachusetts office to help share the load. We also + encourage folks to use the many mirrors available throughout the + world. + + Update: Big thanks to Stanford for providing a high speed link for + downloading EGCS! (go.cygnus.com) + + [6]Download EGCS 1.0 from ftp.cygnus.com (USA California) + + [7]Download EGCS 1.0 from go.cygnus.com (USA California -- High speed + link provided by Stanford) + + The EGCS 1.0 release should be available on most mirror sites by now. + [8]Goto mirror list to find a closer site + + We'd like to thank the numerous people that have contributed new + features, test results, bugfixes, etc. Unfortunately, they're far too + numerous to mention by name. + _________________________________________________________________ + + Last modified on July 28, 1999. + +References + + 1. http://www.sgi.com/Technology/STL + 2. http://gcc.gnu.org/egcs-1.0/features.html + 3. http://gcc.gnu.org/install/index.html + 4. http://gcc.gnu.org/egcs-1.0/buildstat.html + 5. http://gcc.gnu.org/egcs-1.0/caveats.html + 6. ftp://egcs.cygnus.com/pub/egcs/releases/index.html + 7. ftp://go.cygnus.com/pub/sourceware.cygnus.com/pub/egcs/releases/index.html + 8. http://gcc.gnu.org/mirrors.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/features.html + + EGCS 1.0 features + + * Core compiler is based on the gcc2 development tree from Aug 2, + 1997, so we have most of the [1]features found in GCC 2.8. + * Integrated GNU Fortran compiler based on g77-0.5.22-19970929. + * Vast improvements in the C++ compiler; so many they have [2]page + of their own! + * Integrated C++ runtime libraries, including support for most major + linux systems! + * New instruction scheduler from IBM Haifa which includes support + for function wide instruction scheduling as well as superscalar + scheduling. + * Significantly improved alias analysis code. + * Improved register allocation for two address machines. + * Significant code generation improvements for Fortran code on + Alphas + * Various optimizations from the g77 project as well as improved + loop optimizations. + * Dwarf2 debug format support for some targets. + * egcs libstdc++ includes the SGI STL implementation without + changes. + * As a result of these and other changes, egcs libstc++ is not + binary compatible with previous releases of libstdc++. + * Various new ports -- UltraSPARC, Irix6.2 & Irix6.3 support, The + SCO Openserver 5 family (5.0.{0,2,4} and Internet FastStart 1.0 + and 1.1), Support for RTEMS on several embedded targets, Support + for arm-linux, Mitsubishi M32R, Hitachi H8/S, Matsushita MN102 and + MN103, NEC V850, Sparclet, Solaris & Linux on PowerPCs, etc. + * Integrated testsuites for gcc, g++, g77, libstdc++ and libio. + * RS6000/PowerPC ports generate code which can run on all + RS6000/PowerPC variants by default. + * -mcpu= and -march= switches for the x86 port to allow better + control over how the x86 port generates code. + * Includes the template repository patch (aka repo patch); note the + new template code makes repo obsolete for ELF systems using gnu-ld + such as Linux. + * Plus the usual assortment of bugfixes and improvements. + + [3]Return to the egcs home page + + Last modified: July 28, 1999 + +References + + 1. http://gcc.gnu.org/egcs-1.0/features-2.8.html + 2. http://gcc.gnu.org/egcs-1.0/c++features.html + 3. http://gcc.gnu.org/index.html +====================================================================== +http://gcc.gnu.org/egcs-1.0/caveats.html + + EGCS 1.0 Caveats + + * EGCS has an integrated libstdc++, but does not have an integrated + libg++. Furthermore old libg++ releases will not work with egc; HJ + Lu has made a [1]libg++ snapshot available which may work with + EGCS. + Note most C++ programs only need libstdc++. + * Note that using -pedantic or -Wreturn-type can cause an explosion + in the amount of memory needed for template-heavy C++ code, such + as code that uses STL. Also note that -Wall includes + -Wreturn-type, so if you use -Wall you will need to specify + -Wno-return-type to turn it off. + * Exception handling may not work with shared libraries, + particularly on alphas, hppas, and mips based platforms. Exception + handling is known to work on x86-linux platforms with shared + libraries. + * Some versions of the Linux kernel have bugs which prevent them + from being compiled or from running when compiled by EGCS. See + [2]the FAQ for additional information. + * In general, EGCS is more rigorous about rejecting invalid C++ code + or deprecated C++ constructs than G++ 2.7. As a result it may be + necessary to fix C++ code before it will compile with EGCS. + * G++ is also aggressively tracking the C++ standard; as a result + code which was previously valid (and thus accepted by other + compilers and older versions of G++) may no longer be accepted. + * EGCS 1.0 may not work with Red Hat Linux 5.0 on all targets. EGCS + 1.0.x and later releases should work with Red Hat Linux 5.0. + + [3]Return to the GCC home page + + Last modified: August 27, 1998 + +References + + 1. ftp://ftp.yggdrasil.com/private/hjl/libg++-2.8.1.2.tar.gz + 2. http://gcc.gnu.org/fom_serv/cache/24.html + 3. http://gcc.gnu.org/index.html +====================================================================== diff --git a/contrib/gcc/ONEWS b/contrib/gcc/ONEWS new file mode 100644 index 0000000..427df25 --- /dev/null +++ b/contrib/gcc/ONEWS @@ -0,0 +1,1071 @@ +Noteworthy changes in GCC after EGCS 1.1. +----------------------------------------- + +Target specific NEWS + + RS6000/PowerPC: -mcpu=401 was added as an alias for -mcpu=403. -mcpu=e603e + was added to do -mcpu=603e and -msoft-float. + +Noteworthy changes in GCC for EGCS 1.1. +--------------------------------------- + +The compiler now implements global common subexpression elimination (gcse) as +well as global constant/copy propagation. (link to gcse page). + +More major improvements have been made to the alias analysis code. A new +option to allow front-ends to provide alias information to the optimizers +has also been added (-fstrict-aliasing). -fstrict-aliasing is off by default +now, but will be enabled by default in the future. (link to alias page) + +Major changes continue in the exception handling support. This release +includes some changes to reduce static overhead for exception handling. It +also includes some major changes to the setjmp/longjmp based EH mechanism to +make it less pessimistic. And finally, major infrastructure improvements +to the dwarf2 EH mechanism have been made to make our EH support extensible. + +We have fixed the infamous security problems with temporary files. + +The "regmove" optimization pass has been nearly completely rewritten. It now +uses much more information about the target to determine profitability of +transformations. + +The compiler now recomputes register usage information immediately before +register allocation. Previously such information was only not kept up to +date after instruction combination which led to poor register allocation +choices by our priority based register allocator. + +The register reloading phase of the compiler has been improved to better +optimize spill code. This primarily helps targets which generate lots of +spills (like the x86 ports and many register poor embedded ports). + +A few changes in the heuristics used by the register allocator and scheduler +have been made which can significantly improve performance for certain +applications. + +The compiler's branch shortening algorithms have been significantly improved +to work better on targets which align jump targets. + +The compiler now supports the "ADDRESSOF" optimization which can significantly +reduce the overhead for certain inline calls (and inline calls in general). + +The compiler now supports a code size optimization switch (-Os). When enabled +the compiler will prefer optimizations which improve code size over those +which improve code speed. + +The compiler has been improved to completely eliminate library calls which +compute constant values. This is particularly useful on machines which +do not have integer mul/div or floating point support on-chip. + +GCC now supports a "--help" option to print detailed help information. + +cpplib has been greatly improved. It is probably useable for some sites now +(major missing feature is trigraphs). + +Memory footprint for the compiler has been significantly reduced for certain +pathalogical cases. + +Build time improvements for targets which support lots of sched parameters +(alpha and mips primarily). + +Compile time for certain programs using large constant initializers has been +improved (effects glibc significantly). + +Plus an incredible number of infrastructure changes, warning fixes, bugfixes +and local optimizations. + +Various improvements have been made to better support cross compilations. They +are still not easy, but they are improving. + +Target specific NEWS + + Sparc: Now includes V8 plus and V9 support, lots of tuning for Ultrasparcs + and uses the Haifa scheduler by default. + + Alpha: EV6 tuned, optimized expansion of memcpy/bzero. + + x86: Data in the static store is aligned per Intel recommendations. Jump + targets are aligned per Intel recommendations. Improved epilogue + sequences for Pentium chips. Backend improvements which should help + register allocation on all x86 variants. Support for PPro conditional + move instructions has been fixed and enabled. Random changes + throughout the port to make generated code more Pentium friendly. + Improved support for 64bit integer operations. + Unixware 7, a System V Release 5 target is now supported. + SCO OpenServer targets can support GAS. See gcc/INSTALL for details. + + RS6000/PowerPC: Includes AIX4.3 support as well as PowerPC64 support. + Haifa instruction scheduling is enabled by default now. + + MIPS: Multiply/Multiply-Add support has been largely rewritten to generate + more efficient code. Includes mips16 support. + + M68K: Various micro-optimizations and Coldfire fixes. + + M32r: Major improvements to this port. + + Arm: Includes Thumb and super interworking support. + +EGCS includes all gcc2 changes up to and including the June 9, 1998 snapshot. + + +Noteworthy changes in GCC version 2.8.1 +--------------------------------------- + +Numerous bugs have been fixed and some minor performance +improvements (compilation speed) have been made. + +Noteworthy changes in GCC version 2.8.0 +--------------------------------------- + +A major change in this release is the addition of a framework for +exception handling, currently used by C++. Many internal changes and +optimization improvements have been made. These increase the +maintainability and portability of GCC. GCC now uses autoconf to +compute many host parameters. + +The following lists changes that add new features or targets. + +See cp/NEWS for new features of C++ in this release. + +New tools and features: + + The Dwarf 2 debugging information format is supported on ELF systems, and + is the default for -ggdb where available. It can also be used for C++. + The Dwarf version 1 debugging format is also permitted for C++, but + does not work well. + + gcov.c is provided for test coverage analysis and branch profiling + analysis is also supported; see -fprofile-arcs, -ftest-coverage, + and -fbranch-probabilities. + + Support for the Checker memory checking tool. + + New switch, -fstack-check, to check for stack overflow on systems that + don't have such built into their ABI. + + New switches, -Wundef and -Wno-undef to warn if an undefined identifier + is evaluated in an #if directive. + + Options -Wall and -Wimplicit now cause GCC to warn about implicit int + in declarations (e.g. `register i;'), since the C Standard committee + has decided to disallow this in the next revision of the standard; + -Wimplicit-function-declarations and -Wimplicit-int are subsets of + this. + + Option -Wsign-compare causes GCC to warn about comparison of signed and + unsigned values. + + Add -dI option of cccp for cxref. + +New features in configuration, installation and specs file handling: + + New option --enable-c-cpplib to configure script. + + You can use --with-cpu on the configure command to specify the default + CPU that GCC should generate code for. + + The -specs=file switch allows you to override default specs used in + invoking programs like cc1, as, etc. + + Allow including one specs file from another and renaming a specs + variable. + + You can now relocate all GCC files with a single environment variable + or a registry entry under Windows 95 and Windows NT. + +Changes in Objective-C: + + The Objective-C Runtime Library has been made thread-safe. + + The Objective-C Runtime Library contains an interface for creating + mutexes, condition mutexes, and threads; it requires a back-end + implementation for the specific platform and/or thread package. + Currently supported are DEC/OSF1, IRIX, Mach, OS/2, POSIX, PCThreads, + Solaris, and Windows32. The --enable-threads parameter can be used + when configuring GCC to enable and select a thread back-end. + + Objective-C is now configured as separate front-end language to GCC, + making it more convenient to conditionally build it. + + The internal structures of the Objective-C Runtime Library have + changed sufficiently to warrant a new version number; now version 8. + Programs compiled with an older version must be recompiled. + + The Objective-C Runtime Library can be built as a DLL on Windows 95 + and Windows NT systems. + + The Objective-C Runtime Library implements +load. + +The following new targets are supported (see also list under each +individual CPU below): + + Embedded target m32r-elf. + Embedded Hitachi Super-H using ELF. + RTEMS real-time system on various CPU targets. + ARC processor. + NEC V850 processor. + Matsushita MN10200 processor. + Matsushita MN10300 processor. + Sparc and PowerPC running on VxWorks. + Support both glibc versions 1 and 2 on Linux-based GNU systems. + +New features for DEC Alpha systems: + + Allow detailed specification of IEEE fp support: + -mieee, -mieee-with-inexact, and -mieee-conformant + -mfp-trap-mode=xxx, -mfp-round-mode=xxx, -mtrap-precision=xxx + -mcpu=xxx for CPU selection + Support scheduling parameters for EV5. + Add support for BWX, CIX, and MAX instruction set extensions. + Support Linux-based GNU systems. + Support VMS. + +Additional supported processors and systems for MIPS targets: + + MIPS4 instruction set. + R4100, R4300 and R5000 processors. + N32 and N64 ABI. + IRIX 6.2. + SNI SINIX. + +New features for Intel x86 family: + + Add scheduling parameters for Pentium and Pentium Pro. + Support stabs on Solaris-x86. + Intel x86 processors running the SCO OpenServer 5 family. + Intel x86 processors running DG/UX. + Intel x86 using Cygwin32 or Mingw32 on Windows 95 and Windows NT. + +New features for Motorola 68k family: + + Support for 68060 processor. + More consistent switches to specify processor. + Motorola 68k family running AUX. + 68040 running pSOS, ELF object files, DBX debugging. + Coldfire variant of Motorola m68k family. + +New features for the HP PA RISC: + + -mspace and -mno-space + -mlong-load-store and -mno-long-load-store + -mbig-switch -mno-big-switch + + GCC on the PA requires either gas-2.7 or the HP assembler; for best + results using GAS is highly recommended. GAS is required for -g and + exception handling support. + +New features for SPARC-based systems: + + The ultrasparc cpu. + The sparclet cpu, supporting only a.out file format. + Sparc running SunOS 4 with the GNU assembler. + Sparc running the Linux-based GNU system. + Embedded Sparc processors running the ELF object file format. + -mcpu=xxx + -mtune=xxx + -malign-loops=xxx + -malign-jumps=xxx + -malign-functions=xxx + -mimpure-text and -mno-impure-text + + Options -mno-v8 and -mno-sparclite are no longer supported on SPARC + targets. Options -mcypress, -mv8, -msupersparc, -msparclite, -mf930, + and -mf934 are deprecated and will be deleted in GCC 2.9. Use + -mcpu=xxx instead. + +New features for rs6000 and PowerPC systems: + + Solaris 2.51 running on PowerPC's. + The Linux-based GNU system running on PowerPC's. + -mcpu=604e,602,603e,620,801,823,mpc505,821,860,power2 + -mtune=xxx + -mrelocatable-lib, -mno-relocatable-lib + -msim, -mmve, -memb + -mupdate, -mno-update + -mfused-madd, -mno-fused-madd + + -mregnames + -meabi + -mcall-linux, -mcall-solaris, -mcall-sysv-eabi, -mcall-sysv-noeabi + -msdata, -msdata=none, -msdata=default, -msdata=sysv, -msdata=eabi + -memb, -msim, -mmvme + -myellowknife, -mads + wchar_t is now of type long as per the ABI, not unsigned short. + -p/-pg support + -mcpu=403 now implies -mstrict-align. + Implement System V profiling. + + Aix 4.1 GCC targets now default to -mcpu=common so that programs + compiled can be moved between rs6000 and powerpc based systems. A + consequence of this is that -static won't work, and that some programs + may be slightly slower. + + You can select the default value to use for -mcpu=xxx on rs6000 and + powerpc targets by using the --with-cpu=xxx option when configuring the + compiler. In addition, a new options, -mtune=xxx was added that + selects the machine to schedule for but does not select the + architecture level. + + Directory names used for storing the multilib libraries on System V + and embedded PowerPC systems have been shortened to work with commands + like tar that have fixed limits on pathname size. + +New features for the Hitachi H8/300(H): + + -malign-300 + -ms (for the Hitachi H8/S processor) + -mint32 + +New features for the ARM: + + -march=xxx, -mtune=xxx, -mcpu=xxx + Support interworking with Thumb code. + ARM processor with a.out object format, COFF, or AOF assembler. + ARM on "semi-hosted" platform. + ARM running NetBSD. + ARM running the Linux-based GNU system. + +New feature for Solaris systems: + + GCC installation no longer makes a copy of system include files, + thus insulating GCC better from updates to the operating system. + + +Noteworthy changes in GCC version 2.7.2 +--------------------------------------- + +A few bugs have been fixed (most notably the generation of an +invalid assembler opcode on some RS/6000 systems). + +Noteworthy changes in GCC version 2.7.1 +--------------------------------------- + +This release fixes numerous bugs (mostly minor) in GCC 2.7.0, but +also contains a few new features, mostly related to specific targets. + +Major changes have been made in code to support Windows NT. + +The following new targets are supported: + + 2.9 BSD on PDP-11 + Linux on m68k + HP/UX version 10 on HP PA RISC (treated like version 9) + DEC Alpha running Windows NT + +When parsing C, GCC now recognizes C++ style `//' comments unless you +specify `-ansi' or `-traditional'. + +The PowerPC System V targets (powerpc-*-sysv, powerpc-*-eabi) now use the +calling sequence specified in the System V Application Binary Interface +Processor Supplement (PowerPC Processor ABI Supplement) rather than the calling +sequence used in GCC version 2.7.0. That calling sequence was based on the AIX +calling sequence without function descriptors. To compile code for that older +calling sequence, either configure the compiler for powerpc-*-eabiaix or use +the -mcall-aix switch when compiling and linking. + +Noteworthy changes in GCC version 2.7.0 +--------------------------------------- + +GCC now works better on systems that use ".obj" and ".exe" instead of +".o" and no extension. This involved changes to the driver program, +gcc.c, to convert ".o" names to ".obj" and to GCC's Makefile to use +".obj" and ".exe" in filenames that are not targets. In order to +build GCC on such systems, you may need versions of GNU make and/or +compatible shells. At this point, this support is preliminary. + +Object file extensions of ".obj" and executable file extensions of +".exe" are allowed when using appropriate version of GNU Make. + +Numerous enhancements were made to the __attribute__ facility including +more attributes and more places that support it. We now support the +"packed", "nocommon", "noreturn", "volatile", "const", "unused", +"transparent_union", "constructor", "destructor", "mode", "section", +"align", "format", "weak", and "alias" attributes. Each of these +names may also be specified with added underscores, e.g., "__packed__". +__attribute__ may now be applied to parameter definitions, function +definitions, and structure, enum, and union definitions. + +GCC now supports returning more structures in registers, as specified by +many calling sequences (ABIs), such as on the HP PA RISC. + +A new option '-fpack-struct' was added to automatically pack all structure +members together without holes. + +There is a new library (cpplib) and program (cppmain) that at some +point will replace cpp (aka cccp). To use cppmain as cpp now, pass +the option CCCP=cppmain to make. The library is already used by the +fix-header program, which should speed up the fixproto script. + +New options for supported targets: + + GNU on many targets. + NetBSD on MIPS, m68k, VAX, and x86. + LynxOS on x86, m68k, Sparc, and RS/6000. + VxWorks on many targets. + + Windows/NT on x86 architecture. Initial support for Windows/NT on Alpha + (not fully working). + + Many embedded targets, specifically UDI on a29k, aout, coff, elf, + and vsta "operating systems" on m68k, m88k, mips, sparc, and x86. + +Additional support for x86 (i386, i486, and Pentium): + + Work with old and new linkers for Linux-based GNU systems, + supporting both a.out and ELF. + FreeBSD on x86. + Stdcall convention. + -malign-double, -mregparm=, -malign-loops= and -malign-jumps= switches. + On ISC systems, support -Xp like -posix. + +Additions for RS/6000: + + Instruction scheduling information for PowerPC 403. + AIX 4.1 on PowerPC. + -mstring and -mno-string. + -msoft-float and floating-point emulation included. + Preliminary support for PowerPC System V.4 with or without the GNU as. + Preliminary support for EABI. + Preliminary support for 64-bit systems. + Both big and little endian systems. + +New features for MIPS-based systems: + + r4650. + mips4 and R8000. + Irix 6.0. + 64-bit ABI. + Allow dollar signs in labels on SGI/Irix 5.x. + +New support for HP PA RISC: + + Generation of PIC (requires binutils-2.5.2.u6 or later). + HP-UX version 9 on HP PA RISC (dynamically links even with -g). + Processor variants for HP PA RISC: 700, 7100, and 7100LC. + Automatic generation of long calls when needed. + -mfast-indirect-calls for kernels and static binaries. + + The called routine now copies arguments passed by invisible reference, + as required by the calling standard. + +Other new miscellaneous target-specific support: + + -mno-multm on a29k. + -mold-align for i960. + Configuration for "semi-hosted" ARM. + -momit-leaf-frame-pointer for M88k. + SH3 variant of Hitachi Super-H and support both big and little endian. + +Changes to Objective-C: + + Bare-bones implementation of NXConstantString has been added, + which is invoked by the @"string" directive. + + Class * has been changed to Class to conform to the NextSTEP and + OpenStep runtime. + + Enhancements to make dynamic loading easier. + + The module version number has been updated to Version 7, thus existing + code will need to be recompiled to use the current run-time library. + +GCC now supports the ISO Normative Addendum 1 to the C Standard. +As a result: + + The header <iso646.h> defines macros for C programs written + in national variants of ISO 646. + + The following digraph tokens are supported: + <: :> <% %> %: %:%: + These behave like the following, respectively: + [ ] { } # ## + + Digraph tokens are supported unless you specify the `-traditional' + option; you do not need to specify `-ansi' or `-trigraphs'. Except + for contrived and unlikely examples involving preprocessor + stringizing, digraph interpretation doesn't change the meaning of + programs; this is unlike trigraph interpretation, which changes the + meanings of relatively common strings. + + The macro __STDC_VERSION__ has the value 199409L. + + As usual, for full conformance to the standard, you also need a + C library that conforms. + +The following lists changes that have been made to g++. If some +features mentioned below sound unfamiliar, you will probably want to +look at the recently-released public review copy of the C++ Working +Paper. For PostScript and PDF (Adobe Acrobat) versions, see the +archive at ftp://research.att.com/dist/stdc++/WP. For HTML and ASCII +versions, see ftp://ftp.cygnus.com/pub/g++. On the web, see +http://www.cygnus.com/~mrs/wp-draft. + +The scope of variables declared in the for-init-statement has been changed +to conform to http://www.cygnus.com/~mrs/wp-draft/stmt.html#stmt.for; as a +result, packages such as groff 1.09 will not compile unless you specify the +-fno-for-scope flag. PLEASE DO NOT REPORT THIS AS A BUG; this is a change +mandated by the C++ standardization committee. + +Binary incompatibilities: + + The builtin 'bool' type is now the size of a machine word on RISC targets, + for code efficiency; it remains one byte long on CISC targets. + + Code that does not use #pragma interface/implementation will most + likely shrink dramatically, as g++ now only emits the vtable for a + class in the translation unit where its first non-inline, non-abstract + virtual function is defined. + + Classes that do not define the copy constructor will sometimes be + passed and returned in registers. This may illuminate latent bugs in + your code. + +Support for automatic template instantiation has *NOT* been added, due +to a disagreement over design philosophies. + +Support for exception handling has been improved; more targets are now +supported, and throws will use the RTTI mechanism to match against the +catch parameter type. Optimization is NOT SUPPORTED with +-fhandle-exceptions; no need to report this as a bug. + +Support for Run-Time Type Identification has been added with -frtti. +This support is still in alpha; one major restriction is that any file +compiled with -frtti must include <typeinfo.h>. + +Preliminary support for namespaces has been added. This support is far +from complete, and probably not useful. + +Synthesis of compiler-generated constructors, destructors and +assignment operators is now deferred until the functions are used. + +The parsing of expressions such as `a ? b : c = 1' has changed from +`(a ? b : c) = 1' to `a : b ? (c = 1)'. + +The code generated for testing conditions, especially those using || +and &&, is now more efficient. + +The operator keywords and, and_eq, bitand, bitor, compl, not, not_eq, +or, or_eq, xor and xor_eq are now supported. Use -ansi or +-foperator-names to enable them. + +The 'explicit' keyword is now supported. 'explicit' is used to mark +constructors and type conversion operators that should not be used +implicitly. + +g++ now accepts the typename keyword, though it currently has no +semantics; it can be a no-op in the current template implementation. +You may want to start using it in your code, however, since the +pending rewrite of the template implementation to compile STL properly +(perhaps for 2.8.0, perhaps not) will require you to use it as +indicated by the current draft. + +Handling of user-defined type conversion has been overhauled so that +type conversion operators are now found and used properly in +expressions and function calls. + +-fno-strict-prototype now only applies to function declarations with +"C" linkage. + +g++ now warns about 'if (x=0)' with -Wparentheses or -Wall. + +#pragma weak and #pragma pack are supported on System V R4 targets, as +are various other target-specific #pragmas supported by gcc. + +new and delete of const types is now allowed (with no additional +semantics). + +Explicit instantiation of template methods is now supported. Also, +'inline template class foo<int>;' can be used to emit only the vtable +for a template class. + +With -fcheck-new, g++ will check the return value of all calls to +operator new, and not attempt to modify a returned null pointer. + +The template instantiation code now handles more conversions when +passing to a parameter that does not depend on template arguments. +This means that code like 'string s; cout << s;' now works. + +Invalid jumps in a switch statement past declarations that require +initializations are now caught. + +Functions declared 'extern inline' now have the same linkage semantics +as inline member functions. On supported targets, where previously +these functions (and vtables, and template instantiations) would have +been defined statically, they will now be defined as weak symbols so +that only one out-of-line definition is used. + +collect2 now demangles linker output, and c++filt has become part of +the gcc distribution. + +Noteworthy changes in GCC version 2.6.3: + +A few more bugs have been fixed. + +Noteworthy changes in GCC version 2.6.2: + +A few bugs have been fixed. + +Names of attributes can now be preceded and followed by double underscores. + +Noteworthy changes in GCC version 2.6.1: + +Numerous (mostly minor) bugs have been fixed. + +The following new configurations are supported: + + GNU on x86 (instead of treating it like MACH) + NetBSD on Sparc and Motorola 68k + AIX 4.1 on RS/6000 and PowerPC systems + Sequent DYNIX/ptx 1.x and 2.x. + Both COFF and ELF configurations on AViiON without using /bin/gcc + Windows/NT on x86 architecture; preliminary + AT&T DSP1610 digital signal processor chips + i960 systems on bare boards using COFF + PDP11; target only and not extensively tested + +The -pg option is now supported for Alpha under OSF/1 V3.0 or later. + +Files with an extension of ".c++" are treated as C++ code. + +The -Xlinker and -Wl arguments are now passed to the linker in the +position they were specified on the command line. This makes it +possible, for example, to pass flags to the linker about specific +object files. + +The use of positional arguments to the configure script is no longer +recommended. Use --target= to specify the target; see the GCC manual. + +The 386 now supports two new switches: -mreg-alloc=<string> changes +the default register allocation order used by the compiler, and +-mno-wide-multiply disables the use of the mul/imul instructions that +produce 64 bit results in EAX:EDX from 32 bit operands to do long long +multiplies and 32-bit division by constants. + +Noteworthy changes in GCC version 2.6.0: + +Numerous bugs have been fixed, in the C and C++ front-ends, as +well as in the common compiler code. + +This release includes the C, Objective-C, and C++ compilers. However, +we have moved the files for the C++ compiler (G++) files to a +subdirectory, cp. Subsequent releases of GCC will split these files +to a separate TAR file. + +The G++ team has been tracking the development of the ANSI standard for C++. +Here are some new features added from the latest working paper: + + * built-in boolean type 'bool', with constants 'true' and 'false'. + * array new and delete (operator new [] and delete []). + * WP-conforming lifetime of temporaries. + * explicit instantiation of templates (template class A<int>;), + along with an option (-fno-implicit-templates) to disable emission + of implicitly instantiated templates, obsoletes -fexternal-templates. + * static member constants (static const int foo = 4; within the + class declaration). + +Many error messages have been improved to tell the user more about the +problem. Conformance checking with -pedantic-errors has been +improved. G++ now compiles Fresco. + +There is now an experimental implementation of virtual functions using +thunks instead of Cfront-style vtables, enabled with -fvtable-thunks. +This option also enables a heuristic which causes the compiler to only +emit the vtable in the translation unit where its first non-inline +virtual function is defined; using this option and +-fno-implicit-templates, users should be able to avoid #pragma +interface/implementation altogether. + +Signatures have been added as a GNU C++ extension. Using the option +-fhandle-signatures, users are able to turn on recognition of +signatures. A short introduction on signatures is in the section +`Extension to the C++ Language' in the manual. + +The `g++' program is now a C program, rather than a shell script. + +Lots and lots and lots of bugs fixes, in nested types, access control, +pointers to member functions, the parser, templates, overload +resolution, etc, etc. + +There have been two major enhancements to the Objective-C compiler: + +1) Added portability. It now runs on Alpha, and some problems with + message forwarding have been addressed on other platforms. + +2) Selectors have been redefined to be pointers to structs like: + { void *sel_id, char *sel_types }, where the sel_id is the unique + identifier, the selector itself is no longer unique. + + Programmers should use the new function sel_eq to test selector + equivalence. + +The following major changes have been made to the base compiler and +machine-specific files. + +- The MIL-STD-1750A is a new port, but still preliminary. + +- The h8/300h is now supported; both the h8/300 and h8/300h ports come + with 32 bit IEEE 754 software floating point support. + +- The 64-bit Sparc (v9) and 64-bit MIPS chips are supported. + +- NetBSD is supported on m68k, Intel x86, and pc523 systems and FreeBSD + on x86. + +- COFF is supported on x86, m68k, and Sparc systems running LynxOS. + +- 68K systems from Bull and Concurrent are supported and System V + Release 4 is supported on the Atari. + +- GCC supports GAS on the Motorola 3300 (sysV68) and debugging + (assuming GAS) on the Plexus 68K system. (However, GAS does not yet + work on those systems). + +- System V Release 4 is supported on MIPS (Tandem). + +- For DG/UX, an ELF configuration is now supported, and both the ELF + and BCS configurations support ELF and COFF object file formats. + +- OSF/1 V2.0 is supported on Alpha. + +- Function profiling is also supported on Alpha. + +- GAS and GDB is supported for Irix 5 (MIPS). + +- "common mode" (code that will run on both POWER and PowerPC + architectures) is now supported for the RS/6000 family; the + compiler knows about more PPC chips. + +- Both NeXTStep 2.1 and 3 are supported on 68k-based architectures. + +- On the AMD 29k, the -msoft-float is now supported, as well as + -mno-sum-in-toc for RS/6000, -mapp-regs and -mflat for Sparc, and + -membedded-pic for MIPS. + +- GCC can now convert division by integer constants into the equivalent + multiplication and shift operations when that is faster than the + division. + +- Two new warning options, -Wbad-function-cast and + -Wmissing-declarations have been added. + +- Configurations may now add machine-specific __attribute__ options on + type; many machines support the `section' attribute. + +- The -ffast-math flag permits some optimization that violate strict + IEEE rules, such as converting X * 0.0 to 0.0. + +Noteworthy changes in GCC version 2.5.8: + +This release only fixes a few serious bugs. These include fixes for a +bug that prevented most programs from working on the RS/6000, a bug +that caused invalid assembler code for programs with a `switch' +statement on the NS32K, a G++ problem that caused undefined names in +some configurations, and several less serious problems, some of which +can affect most configuration. + +Noteworthy change in GCC version 2.5.7: + +This release only fixes a few bugs, one of which was causing bootstrap +compare errors on some systems. + +Noteworthy change in GCC version 2.5.6: + +A few backend bugs have been fixed, some of which only occur on one +machine. + +The C++ compiler in 2.5.6 includes: + + * fixes for some common crashes + * correct handling of nested types that are referenced as `foo::bar' + * spurious warnings about friends being declared static and never + defined should no longer appear + * enums that are local to a method in a class, or a class that's + local to a function, are now handled correctly. For example: + class foo { void bar () { enum { x, y } E; x; } }; + void bar () { class foo { enum { x, y } E; E baz; }; } + +Noteworthy change in GCC version 2.5.5: + +A large number of C++ bugs have been fixed. + +The fixproto script adds prototypes conditionally on __cplusplus. + +Noteworthy change in GCC version 2.5.4: + +A bug fix in passing of structure arguments for the HP-PA architecture +makes code compiled with GCC 2.5.4 incompatible with code compiled +with earlier versions (if it passes struct arguments of 33 to 64 bits, +interspersed with other types of arguments). + +Noteworthy change in gcc version 2.5.3: + +The method of "mangling" C++ function names has been changed. So you +must recompile all C++ programs completely when you start using GCC +2.5. Also, GCC 2.5 requires libg++ version 2.5. Earlier libg++ +versions won't work with GCC 2.5. (This is generally true--GCC +version M.N requires libg++ version M.N.) + +Noteworthy GCC changes in version 2.5: + +* There is now support for the IBM 370 architecture as a target. +Currently the only operating system supported is MVS; GCC does not run +on MVS, so you must produce .s files using GCC as a cross compiler, +then transfer them to MVS to assemble them. This port is not reliable +yet. + +* The Power PC is now supported. + +* The i860-based Paragon machine is now supported. + +* The Hitachi 3050 (an HP-PA machine) is now supported. + +* The variable __GNUC_MINOR__ holds the minor version number of GCC, as +an integer. For version 2.5.X, the value is 5. + +* In C, initializers for static and global variables are now processed +an element at a time, so that they don't need a lot of storage. + +* The C syntax for specifying which structure field comes next in an +initializer is now `.FIELDNAME='. The corresponding syntax for +array initializers is now `[INDEX]='. For example, + + char whitespace[256] + = { [' '] = 1, ['\t'] = 1, ['\n'] = 1 }; + +This was changed to accord with the syntax proposed by the Numerical +C Extensions Group (NCEG). + +* Complex numbers are now supported in C. Use the keyword __complex__ +to declare complex data types. See the manual for details. + +* GCC now supports `long double' meaningfully on the Sparc (128-bit +floating point) and on the 386 (96-bit floating point). The Sparc +support is enabled on Solaris 2.x because earlier system versions +(SunOS 4) have bugs in the emulation. + +* All targets now have assertions for cpu, machine and system. So you +can now use assertions to distinguish among all supported targets. + +* Nested functions in C may now be inline. Just declare them inline +in the usual way. + +* Packed structure members are now supported fully; it should be possible +to access them on any supported target, no matter how little alignment +they have. + +* To declare that a function does not return, you must now write +something like this (works only in 2.5): + + void fatal () __attribute__ ((noreturn)); + +or like this (works in older versions too): + + typedef void voidfn (); + + volatile voidfn fatal; + +It used to be possible to do so by writing this: + + volatile void fatal (); + +but it turns out that ANSI C requires that to mean something +else (which is useless). + +Likewise, to declare that a function is side-effect-free +so that calls may be deleted or combined, write +something like this (works only in 2.5): + + int computation () __attribute__ ((const)); + +or like this (works in older versions too): + + typedef int intfn (); + + const intfn computation; + +* The new option -iwithprefixbefore specifies a directory to add to +the search path for include files in the same position where -I would +put it, but uses the specified prefix just like -iwithprefix. + +* Basic block profiling has been enhanced to record the function the +basic block comes from, and if the module was compiled for debugging, +the line number and filename. A default version of the basic block +support module has been added to libgcc2 that appends the basic block +information to a text file 'bb.out'. Machine descriptions can now +override the basic block support module in the target macro file. + +New features in g++: + +* The new flag `-fansi-overloading' for C++. Use a newly implemented +scheme of argument matching for C++. It makes g++ more accurately +obey the rules set down in Chapter 13 of the Annotated C++ Reference +Manual (the ARM). This option will be turned on by default in a +future release. + +* The -finline-debug flag is now gone (it was never really used by the + compiler). + +* Recognizing the syntax for pointers to members, e.g., "foo::*bar", has been + dramatically improved. You should not get any syntax errors or incorrect + runtime results while using pointers to members correctly; if you do, it's + a definite bug. + +* Forward declaration of an enum is now flagged as an error. + +* Class-local typedefs are now working properly. + +* Nested class support has been significantly improved. The compiler + will now (in theory) support up to 240 nested classes before hitting + other system limits (like memory size). + +* There is a new C version of the `g++' driver, to replace the old + shell script. This should significantly improve the performance of + executing g++ on a system where a user's PATH environment variable + references many NFS-mounted filesystems. This driver also works + under MS-DOS and OS/2. + +* The ANSI committee working on the C++ standard has adopted a new + keyword `mutable'. This will allow you to make a specific member be + modifiable in an otherwise const class. + +Noteworthy GCC changes in version 2.4.4: + + A crash building g++ on various hosts (including m68k) has been + fixed. Also the g++ compiler no longer reports incorrect + ambiguities in some situations where they do not exist, and + const template member functions are now being found properly. + +Noteworthy GCC changes in version 2.4: + +* On each target, the default is now to return short structures +compatibly with the "usual" compiler on that target. + +For most targets, this means the default is to return all structures +in memory, like long structures, in whatever way is used on that +target. Use -freg-struct-return to enable returning short structures +(and unions) in registers. + +This change means that newly compiled binaries are incompatible with +binaries compiled with previous versions of GCC. + +On some targets, GCC is itself the usual compiler. On these targets, +the default way to return short structures is still in registers. +Use -fpcc-struct-return to tell GCC to return them in memory. + +* There is now a floating point emulator which can imitate the way all +supported target machines do floating point arithmetic. + +This makes it possible to have cross compilation to and from the VAX, +and between machines of different endianness. However, this works +only when the target machine description is updated to use the new +facilities, and not all have been updated. + +This also makes possible support for longer floating point types. +GCC 2.4 supports extended format on the 68K if you use `long double', +for targets that have a 68881. (When we have run time library +routines for extended floating point, then `long double' will use +extended format on all 68K targets.) + +We expect to support extended floating point on the i386 and Sparc in +future versions. + +* Building GCC now automatically fixes the system's header files. +This should require no attention. + +* GCC now installs an unsigned data type as size_t when it fixes the +header files (on all but a handful of old target machines). +Therefore, the bug that size_t failed to be unsigned is fixed. + +* Building and installation are now completely separate. +All new files are constructed during the build process; +installation just copies them. + +* New targets supported: Clipper, Hitachi SH, Hitachi 8300, and Sparc +Lite. + +* A totally new and much better Objective C run time system is included. + +* Objective C supports many new features. Alas, I can't describe them +since I don't use that language; however, they are the same ones +supported in recent versions of the NeXT operating system. + +* The builtin functions __builtin_apply_args, __builtin_apply and +__builtin_return let you record the arguments and returned +value of a function without knowing their number or type. + +* The builtin string variables __FUNCTION__ and __PRETTY_FUNCTION__ +give the name of the function in the source, and a pretty-printed +version of the name. The two are the same in C, but differ in C++. + +* Casts to union types do not yield lvalues. + +* ## before an empty rest argument discards the preceding sequence +of non-whitespace characters from the macro definition. +(This feature is subject to change.) + + +New features specific to C++: + +* The manual contains a new section ``Common Misunderstandings with +GNU C++'' that C++ users should read. + +* #pragma interface and #pragma implementation let you use the same +C++ source file for both interface and implementation. +However, this mechanism is still in transition. + +* Named returned values let you avoid an extra constructor call +when a function result has a class type. + +* The C++ operators <? and >? yield min and max, respectively. + +* C++ gotos can exit a block safely even if the block has +aggregates that require destructors. + +* gcc defines the macro __GNUG__ when compiling C++ programs. + +* GNU C++ now correctly distinguishes between the prefix and postfix +forms of overloaded operator ++ and --. To avoid breaking old +code, if a class defines only the prefix form, the compiler +accepts either ++obj or obj++, unless -pedantic is used. + +* If you are using version 2.3 of libg++, you need to rebuild it with +`make CC=gcc' to avoid mismatches in the definition of `size_t'. + +Newly documented compiler options: + +-fnostartfiles + Omit the standard system startup files when linking. + +-fvolatile-global + Consider memory references to extern and global data items to + be volatile. + +-idirafter DIR + Add DIR to the second include path. + +-iprefix PREFIX + Specify PREFIX for later -iwithprefix options. + +-iwithprefix DIR + Add PREFIX/DIR to the second include path. + +-mv8 + Emit Sparc v8 code (with integer multiply and divide). +-msparclite + Emit Sparclite code (roughly v7.5). + +-print-libgcc-file-name + Search for the libgcc.a file, print its absolute file name, and exit. + +-Woverloaded-virtual + Warn when a derived class function declaration may be an error + in defining a C++ virtual function. + +-Wtemplate-debugging + When using templates in a C++ program, warn if debugging is + not yet fully available. + ++eN + Control how C++ virtual function definitions are used + (like cfront 1.x). + diff --git a/contrib/gcc/alias.c b/contrib/gcc/alias.c index 0cf893c..e8bf04e 100644 --- a/contrib/gcc/alias.c +++ b/contrib/gcc/alias.c @@ -1,5 +1,5 @@ /* Alias analysis for GNU C - Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. Contributed by John Carr (jfc@mit.edu). This file is part of GNU CC. diff --git a/contrib/gcc/c-decl.c b/contrib/gcc/c-decl.c index 8844988..6f8a900 100644 --- a/contrib/gcc/c-decl.c +++ b/contrib/gcc/c-decl.c @@ -1,5 +1,6 @@ /* Process declarations and variables for C compiler. - Copyright (C) 1988, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 + Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/c-typeck.c b/contrib/gcc/c-typeck.c index d320307..a24cc38 100644 --- a/contrib/gcc/c-typeck.c +++ b/contrib/gcc/c-typeck.c @@ -1,5 +1,6 @@ /* Build expressions with type checking for C compiler. - Copyright (C) 1987, 88, 91-97, 1998 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/calls.c b/contrib/gcc/calls.c index 36a5d15..bb7595a 100644 --- a/contrib/gcc/calls.c +++ b/contrib/gcc/calls.c @@ -1,5 +1,6 @@ /* Convert function calls to rtl insns, for GNU C compiler. - Copyright (C) 1989, 92-97, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 + Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/collect2.c b/contrib/gcc/collect2.c index c1f9b1c..153ac6f 100644 --- a/contrib/gcc/collect2.c +++ b/contrib/gcc/collect2.c @@ -1,6 +1,7 @@ /* Collect static initialization info into data structures that can be traversed by C++ initialization and finalization routines. - Copyright (C) 1992, 93-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 + Free Software Foundation, Inc. Contributed by Chris Smith (csmith@convex.com). Heavily modified by Michael Meissner (meissner@cygnus.com), Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com). diff --git a/contrib/gcc/combine.c b/contrib/gcc/combine.c index 2b7af1e..eb75481 100644 --- a/contrib/gcc/combine.c +++ b/contrib/gcc/combine.c @@ -1,5 +1,6 @@ /* Optimize by combining instructions for GNU compiler. - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/config/sparc/sparc.c b/contrib/gcc/config/sparc/sparc.c index 6d2d44f..6ec392b 100644 --- a/contrib/gcc/config/sparc/sparc.c +++ b/contrib/gcc/config/sparc/sparc.c @@ -1,5 +1,6 @@ /* Subroutines for insn-output.c for Sun SPARC. - Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. Contributed by Michael Tiemann (tiemann@cygnus.com) 64 bit SPARC V9 support by Michael Tiemann, Jim Wilson, and Doug Evans, at Cygnus Support. diff --git a/contrib/gcc/config/sparc/sparc.md b/contrib/gcc/config/sparc/sparc.md index aafb7a6..58e882c 100644 --- a/contrib/gcc/config/sparc/sparc.md +++ b/contrib/gcc/config/sparc/sparc.md @@ -1,5 +1,6 @@ ;;- Machine description for SPARC chip for GNU C compiler -;; Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. +;; Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, +;; 1999 Free Software Foundation, Inc. ;; Contributed by Michael Tiemann (tiemann@cygnus.com) ;; 64 bit SPARC V9 support by Michael Tiemann, Jim Wilson, and Doug Evans, ;; at Cygnus Support. diff --git a/contrib/gcc/configure.in b/contrib/gcc/configure.in index 2d054fd..55dcec7 100644 --- a/contrib/gcc/configure.in +++ b/contrib/gcc/configure.in @@ -1,7 +1,7 @@ # configure.in for GNU CC # Process this file with autoconf to generate a configuration script. -# Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. +# Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. #This file is part of GNU CC. @@ -396,10 +396,9 @@ GCC_FUNC_PRINTF_PTR case "${host}" in *-*-uwin*) - # Under some versions of uwin, vfork is notoriously buggy and the test - # can hang configure; on other versions, vfork exists just as a stub. - # FIXME: This should be removed once vfork in uwin's runtime is fixed. - ac_cv_func_vfork_works=no + AC_MSG_ERROR([ +*** UWIN may not be used as a host platform because +*** linking with posix.dll is not allowed by the GNU GPL]) ;; esac AC_FUNC_VFORK @@ -1564,8 +1563,6 @@ changequote(,)dnl i[34567]86-*-uwin*) changequote([,])dnl tm_file=i386/uwin.h - xm_file="${xm_file} i386/xm-uwin.h" - xm_defines="USG NO_STAB_H NO_SYS_SIGLIST" tmake_file="i386/t-cygwin i386/t-uwin" extra_objs=winnt.o xmake_file=i386/x-cygwin diff --git a/contrib/gcc/cp/lang-specs.h b/contrib/gcc/cp/lang-specs.h index baa2fcd..92cdf3a 100644 --- a/contrib/gcc/cp/lang-specs.h +++ b/contrib/gcc/cp/lang-specs.h @@ -1,5 +1,5 @@ /* Definitions for specs for C++. - Copyright (C) 1995, 96-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/cppinit.c b/contrib/gcc/cppinit.c index 86e0d68..453cc58 100644 --- a/contrib/gcc/cppinit.c +++ b/contrib/gcc/cppinit.c @@ -1,5 +1,6 @@ /* CPP Library. - Copyright (C) 1986, 87, 89, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. Contributed by Per Bothner, 1994-95. Based on CCCP program by Paul Rubin, June 1986 Adapted to ANSI C, Richard Stallman, Jan 1987 diff --git a/contrib/gcc/cse.c b/contrib/gcc/cse.c index e315610..ca40ab3 100644 --- a/contrib/gcc/cse.c +++ b/contrib/gcc/cse.c @@ -1,5 +1,6 @@ /* Common subexpression elimination for GNU compiler. - Copyright (C) 1987, 88, 89, 92-99, 2000 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/dwarf2out.c b/contrib/gcc/dwarf2out.c index 30df09d..7ce8050 100644 --- a/contrib/gcc/dwarf2out.c +++ b/contrib/gcc/dwarf2out.c @@ -1,5 +1,6 @@ /* Output Dwarf2 format symbol table information from the GNU C compiler. - Copyright (C) 1992, 93, 95-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000 Free Software + Foundation, Inc. Contributed by Gary Funck (gary@intrepid.com). Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com). Extensively modified by Jason Merrill (jason@cygnus.com). diff --git a/contrib/gcc/emit-rtl.c b/contrib/gcc/emit-rtl.c index 54cee16..7910472 100644 --- a/contrib/gcc/emit-rtl.c +++ b/contrib/gcc/emit-rtl.c @@ -1,5 +1,6 @@ /* Emit RTL for the GNU C-Compiler expander. - Copyright (C) 1987, 88, 92-97, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -248,6 +249,9 @@ extern int emit_lineno; static rtx make_jump_insn_raw PROTO((rtx)); static rtx make_call_insn_raw PROTO((rtx)); static rtx find_line_note PROTO((rtx)); +static void unshare_all_rtl_1 PROTO((rtx)); +static void unshare_all_decls PROTO((tree)); +static void reset_used_decls PROTO((tree)); rtx gen_rtx_CONST_INT (mode, arg) @@ -1767,23 +1771,29 @@ restore_emit_status (p) free_insn = 0; } -/* Go through all the RTL insn bodies and copy any invalid shared structure. - It does not work to do this twice, because the mark bits set here - are not cleared afterwards. */ +/* Go through all the RTL insn bodies and copy any invalid shared + structure. This routine should only be called once. */ void -unshare_all_rtl (insn) - register rtx insn; +unshare_all_rtl (fndecl, insn) + tree fndecl; + rtx insn; { - for (; insn; insn = NEXT_INSN (insn)) - if (GET_CODE (insn) == INSN || GET_CODE (insn) == JUMP_INSN - || GET_CODE (insn) == CALL_INSN) - { - PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn)); - REG_NOTES (insn) = copy_rtx_if_shared (REG_NOTES (insn)); - LOG_LINKS (insn) = copy_rtx_if_shared (LOG_LINKS (insn)); - } + tree decl; + + /* Make sure that virtual stack slots are not shared. */ + reset_used_decls (DECL_INITIAL (current_function_decl)); + + /* Make sure that virtual parameters are not shared. */ + for (decl = DECL_ARGUMENTS (fndecl); decl; decl = TREE_CHAIN (decl)) + DECL_RTL (decl) = copy_rtx_if_shared (DECL_RTL (decl)); + /* Make sure that virtual stack slots are not shared. */ + unshare_all_decls (DECL_INITIAL (fndecl)); + + /* Unshare just about everything else. */ + unshare_all_rtl_1 (insn); + /* Make sure the addresses of stack slots found outside the insn chain (such as, in DECL_RTL of a variable) are not shared with the insn chain. @@ -1791,8 +1801,76 @@ unshare_all_rtl (insn) This special care is necessary when the stack slot MEM does not actually appear in the insn chain. If it does appear, its address is unshared from all else at that point. */ + stack_slot_list = copy_rtx_if_shared (stack_slot_list); +} + +/* Go through all the RTL insn bodies and copy any invalid shared + structure, again. This is a fairly expensive thing to do so it + should be done sparingly. */ + +void +unshare_all_rtl_again (insn) + rtx insn; +{ + rtx p; + for (p = insn; p; p = NEXT_INSN (p)) + if (GET_RTX_CLASS (GET_CODE (p)) == 'i') + { + reset_used_flags (PATTERN (p)); + reset_used_flags (REG_NOTES (p)); + reset_used_flags (LOG_LINKS (p)); + } + unshare_all_rtl_1 (insn); +} + +/* Go through all the RTL insn bodies and copy any invalid shared structure. + Assumes the mark bits are cleared at entry. */ + +static void +unshare_all_rtl_1 (insn) + rtx insn; +{ + for (; insn; insn = NEXT_INSN (insn)) + if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') + { + PATTERN (insn) = copy_rtx_if_shared (PATTERN (insn)); + REG_NOTES (insn) = copy_rtx_if_shared (REG_NOTES (insn)); + LOG_LINKS (insn) = copy_rtx_if_shared (LOG_LINKS (insn)); + } +} + +/* Go through all virtual stack slots of a function and copy any + shared structure. */ +static void +unshare_all_decls (blk) + tree blk; +{ + tree t; + + /* Copy shared decls. */ + for (t = BLOCK_VARS (blk); t; t = TREE_CHAIN (t)) + DECL_RTL (t) = copy_rtx_if_shared (DECL_RTL (t)); + + /* Now process sub-blocks. */ + for (t = BLOCK_SUBBLOCKS (blk); t; t = TREE_CHAIN (t)) + unshare_all_decls (t); +} + +/* Go through all virtual stack slots of a function and mark them as + not shared. */ +static void +reset_used_decls (blk) + tree blk; +{ + tree t; + + /* Mark decls. */ + for (t = BLOCK_VARS (blk); t; t = TREE_CHAIN (t)) + reset_used_flags (DECL_RTL (t)); - copy_rtx_if_shared (stack_slot_list); + /* Now process sub-blocks. */ + for (t = BLOCK_SUBBLOCKS (blk); t; t = TREE_CHAIN (t)) + reset_used_decls (t); } /* Mark ORIG as in use, and return a copy of it if it was already in use. diff --git a/contrib/gcc/expmed.c b/contrib/gcc/expmed.c index dd5973d..35755c0 100644 --- a/contrib/gcc/expmed.c +++ b/contrib/gcc/expmed.c @@ -1,6 +1,7 @@ /* Medium-level subroutines: convert bit-field store and extract and shifts, multiplies and divides to rtl instructions. - Copyright (C) 1987, 88, 89, 92-97, 1998 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/expr.c b/contrib/gcc/expr.c index 3624f77..b8bcc86 100644 --- a/contrib/gcc/expr.c +++ b/contrib/gcc/expr.c @@ -1,5 +1,6 @@ /* Convert tree expression to rtl instructions, for GNU compiler. - Copyright (C) 1988, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -8664,6 +8665,13 @@ expand_builtin_setjmp_receiver (receiver_label) { ; /* Nothing */ } + + /* @@@ This is a kludge. Not all machine descriptions define a blockage + insn, but we must not allow the code we just generated to be reordered + by scheduling. Specifically, the update of the frame pointer must + happen immediately, not later. So emit an ASM_INPUT to act as blockage + insn. */ + emit_insn (gen_rtx_ASM_INPUT (VOIDmode, "")); } diff --git a/contrib/gcc/f/lang-specs.h b/contrib/gcc/f/lang-specs.h index 39afae0..f37d14d 100644 --- a/contrib/gcc/f/lang-specs.h +++ b/contrib/gcc/f/lang-specs.h @@ -1,5 +1,5 @@ /* lang-specs.h file for Fortran - Copyright (C) 1995-1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. Contributed by James Craig Burley. This file is part of GNU Fortran. diff --git a/contrib/gcc/flow.c b/contrib/gcc/flow.c index b9c9d07..432a990 100644 --- a/contrib/gcc/flow.c +++ b/contrib/gcc/flow.c @@ -1,5 +1,6 @@ /* Data flow analysis for GNU compiler. - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/fold-const.c b/contrib/gcc/fold-const.c index f260ab4..a1901a8 100644 --- a/contrib/gcc/fold-const.c +++ b/contrib/gcc/fold-const.c @@ -1,5 +1,6 @@ /* Fold a constant sub-tree into a single node for C-compiler - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/frame.c b/contrib/gcc/frame.c index 4dabf11..990a0ac 100644 --- a/contrib/gcc/frame.c +++ b/contrib/gcc/frame.c @@ -1,6 +1,6 @@ /* Subroutines needed for unwinding stack frames for exception handling. */ /* Compile this one with gcc. */ -/* Copyright (C) 1997, 1998 Free Software Foundation, Inc. +/* Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc. Contributed by Jason Merrill <jason@cygnus.com>. This file is part of GNU CC. diff --git a/contrib/gcc/gcc.texi b/contrib/gcc/gcc.texi index 8c08fa8..9c1f450 100644 --- a/contrib/gcc/gcc.texi +++ b/contrib/gcc/gcc.texi @@ -100,7 +100,7 @@ Published by the Free Software Foundation 59 Temple Place - Suite 330 Boston, MA 02111-1307 USA -Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. +Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice diff --git a/contrib/gcc/loop.c b/contrib/gcc/loop.c index d7242ed..aca291d 100644 --- a/contrib/gcc/loop.c +++ b/contrib/gcc/loop.c @@ -1,5 +1,6 @@ /* Perform various loop optimizations, including strength reduction. - Copyright (C) 1987, 88, 89, 91-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, + 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -919,6 +920,7 @@ scan_loop (loop_start, end, loop_cont, unroll_p, bct_p) && VARRAY_INT (set_in_loop, regno) == 1 && ! side_effects_p (SET_SRC (set)) && ! find_reg_note (p, REG_RETVAL, NULL_RTX) + && ! find_reg_note (p, REG_LABEL, NULL_RTX) && (! SMALL_REGISTER_CLASSES || (! (GET_CODE (SET_SRC (set)) == REG && REGNO (SET_SRC (set)) < FIRST_PSEUDO_REGISTER))) diff --git a/contrib/gcc/objc/lang-specs.h b/contrib/gcc/objc/lang-specs.h index b0d8731..7b9b2fa 100644 --- a/contrib/gcc/objc/lang-specs.h +++ b/contrib/gcc/objc/lang-specs.h @@ -1,5 +1,5 @@ /* Definitions for specs for Objective-C. - Copyright (C) 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/optabs.c b/contrib/gcc/optabs.c index bb875ee..b360262 100644 --- a/contrib/gcc/optabs.c +++ b/contrib/gcc/optabs.c @@ -1,5 +1,6 @@ /* Expand the basic unary and binary arithmetic operations, for GNU compiler. - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/reload.h b/contrib/gcc/reload.h index 7bc6cca..1998809 100644 --- a/contrib/gcc/reload.h +++ b/contrib/gcc/reload.h @@ -1,5 +1,6 @@ /* Communication between reload.c and reload1.c. - Copyright (C) 1987, 91-95, 97, 1998 Free Software Foundation, Inc. + Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000 + Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/reload1.c b/contrib/gcc/reload1.c index 027accf..e95ff5e 100644 --- a/contrib/gcc/reload1.c +++ b/contrib/gcc/reload1.c @@ -1,5 +1,6 @@ /* Reload pseudo regs into hard regs for insns that require hard regs. - Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, + 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/rtl.h b/contrib/gcc/rtl.h index 0f43e87..efbf588 100644 --- a/contrib/gcc/rtl.h +++ b/contrib/gcc/rtl.h @@ -1,5 +1,6 @@ /* Register Transfer Language (RTL) definitions for GNU C-Compiler - Copyright (C) 1987, 91-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -1391,7 +1392,7 @@ extern int subreg_realpart_p PROTO ((rtx)); extern void reverse_comparison PROTO ((rtx)); extern void set_new_first_and_last_insn PROTO ((rtx, rtx)); extern void set_new_first_and_last_label_num PROTO ((int, int)); -extern void unshare_all_rtl PROTO ((rtx)); +extern void unshare_all_rtl_again PROTO ((rtx)); extern void set_last_insn PROTO ((rtx)); extern void link_cc0_insns PROTO ((rtx)); extern void add_insn PROTO ((rtx)); diff --git a/contrib/gcc/rtlanal.c b/contrib/gcc/rtlanal.c index 49131a4..d1b9432 100644 --- a/contrib/gcc/rtlanal.c +++ b/contrib/gcc/rtlanal.c @@ -1,5 +1,6 @@ /* Analyze RTL for C-Compiler - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/stmt.c b/contrib/gcc/stmt.c index 914117c..6ca6197 100644 --- a/contrib/gcc/stmt.c +++ b/contrib/gcc/stmt.c @@ -1,5 +1,6 @@ /* Expands front end tree to back end RTL for GNU C-Compiler - Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/system.h b/contrib/gcc/system.h index 1b40e60..0645787 100644 --- a/contrib/gcc/system.h +++ b/contrib/gcc/system.h @@ -1,6 +1,6 @@ /* system.h - Get common system includes and various definitions and declarations based on autoconf macros. - Copyright (C) 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of GNU CC. diff --git a/contrib/gcc/tree.c b/contrib/gcc/tree.c index 5e29d2f..31bfd9a 100644 --- a/contrib/gcc/tree.c +++ b/contrib/gcc/tree.c @@ -1,5 +1,6 @@ /* Language-independent node constructors for parse phase of GNU compiler. - Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -1121,6 +1122,26 @@ make_node (code) case 'c': TREE_CONSTANT (t) = 1; break; + + case 'e': + switch (code) + { + case INIT_EXPR: + case MODIFY_EXPR: + case RTL_EXPR: + case PREDECREMENT_EXPR: + case PREINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + /* All of these have side-effects, no matter what their + operands are. */ + TREE_SIDE_EFFECTS (t) = 1; + break; + + default: + break; + } + break; } return t; @@ -3107,6 +3128,24 @@ build1 (code, type, node) TREE_RAISES (t) = 1; } + switch (code) + { + case INIT_EXPR: + case MODIFY_EXPR: + case RTL_EXPR: + case PREDECREMENT_EXPR: + case PREINCREMENT_EXPR: + case POSTDECREMENT_EXPR: + case POSTINCREMENT_EXPR: + /* All of these have side-effects, no matter what their + operands are. */ + TREE_SIDE_EFFECTS (t) = 1; + break; + + default: + break; + } + return t; } diff --git a/contrib/gcc/tree.h b/contrib/gcc/tree.h index 0d7ea84..29fe800 100644 --- a/contrib/gcc/tree.h +++ b/contrib/gcc/tree.h @@ -1,5 +1,6 @@ /* Front-end tree definitions for GNU compiler. - Copyright (C) 1989, 93-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 + Free Software Foundation, Inc. This file is part of GNU CC. @@ -2207,6 +2208,7 @@ extern tree reorder_blocks PROTO ((tree *, tree, struct rtx_def *)); extern void free_temps_for_rtl_expr PROTO ((tree)); extern void instantiate_virtual_regs PROTO ((tree, struct rtx_def *)); +extern void unshare_all_rtl PROTO ((tree, struct rtx_def *)); extern int max_parm_reg_num PROTO ((void)); extern void push_function_context PROTO ((void)); extern void pop_function_context PROTO ((void)); diff --git a/contrib/gcc/unroll.c b/contrib/gcc/unroll.c index 376bc99..34fb8f1 100644 --- a/contrib/gcc/unroll.c +++ b/contrib/gcc/unroll.c @@ -1,5 +1,6 @@ /* Try to unroll loops, and split induction variables. - Copyright (C) 1992, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc. + Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000 Free Software + Foundation, Inc. Contributed by James E. Wilson, Cygnus Support/UC Berkeley. This file is part of GNU CC. diff --git a/contrib/gcc/varasm.c b/contrib/gcc/varasm.c index f463d84..56fe2ad 100644 --- a/contrib/gcc/varasm.c +++ b/contrib/gcc/varasm.c @@ -1,5 +1,6 @@ /* Output variables, constants and external declarations, for GNU compiler. - Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. @@ -3493,6 +3494,18 @@ force_const_mem (mode, x) pop_obstacks (); } + if (GET_CODE (x) == LABEL_REF) + { + extern rtx forced_labels; + + push_obstacks_nochange (); + rtl_in_saveable_obstack (); + + forced_labels = gen_rtx_EXPR_LIST (VOIDmode, + XEXP (x, 0), + forced_labels); + pop_obstacks (); + } /* Allocate a pool constant descriptor, fill it in, and chain it in. */ diff --git a/contrib/gcc/version.c b/contrib/gcc/version.c index e415651..5c11bbb 100644 --- a/contrib/gcc/version.c +++ b/contrib/gcc/version.c @@ -1 +1 @@ -char *version_string = "2.95.3 20010101 (prerelease)"; +char *version_string = "2.95.3 20010125 (prerelease)"; |
