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Diffstat (limited to 'contrib/gcc/README.RS6000')
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diff --git a/contrib/gcc/README.RS6000 b/contrib/gcc/README.RS6000 deleted file mode 100644 index d29604f..0000000 --- a/contrib/gcc/README.RS6000 +++ /dev/null @@ -1,111 +0,0 @@ - AIX 3.1 and 3.2 assembler problems - -Specifying the -g flag to GCC on the RS/6000 requires upgrading the -standard AIX assembler distributed with AIX 3.1 and versions of AIX -3.2 earlier than 3.2.4 with a replacement that is available from IBM. -Note that Makefile.in specifies the -g when compiling libgcc2.c. - -You can test for the presence of a fixed assembler by entering the following: - % as -u < /dev/null -If the command exits normally, the assembler fix already is installed. -If the assembler complains that "-u" is an unknown flag, you need to order -the fix. - -If you are running AIX 3.1 (lslpp -h bos.obj output reports -03.01.0005.XXXX where the 0005 can be any higher number and the XXXX -can be any value), call IBM Support at 800-237-5511 and ask for -shipment of AIX/6000 fix PTF U403044 for APAR IX22829 (.extern foo -conflicts with defining foo). - -If you are running AIX 3.2 but not 3.2.4 or later (lslpp -h bos.obj -output reports 03.02.0000.0000), a newer update to the assembler fix -is available. Ask for shipment of AIX/6000 fix PTF U416277 for -IX32992 (.global prevents detection of duplicate symbol). - -If you are running AIX 3.2.4 or later, you already have the new -assembler. - -Any customer can order and get the replacement assembler, and install it on -one or more machines. It is available on diskette from IBM Customer Support -and from the IBM Internet fix anonymous ftp server (FixDist) at -aix.boulder.ibm.com (198.17.57.66). - -If you contact IBM Customer Support, they may also ask you for your customer -number. If you do not know it, you will still be able to get the fix, but -you will have to be persistent. IBM has corresponding support organizations -outside of North America. Call your IBM branch office and ask them to put -you in touch with the department that handles fixes for AIX/6000. If that -doesn't work, ask for the department that handles software defect support -for AIX/6000 and ask for the APAR fix. - -If you use the GNU assembler instead of the system supplied assembler, you need -an assembler modified after October 16th, 1995 in order to build the GNU C -compiler. This is because the GNU C compiler wants to build a variant of its -library, libgcc.a with the -mcpu=common switch to support building programs -that can run on either the Power or PowerPC machines. - - - AIX NLS problems - -AIX on the RS/6000 provides support (NLS) for environments outside of -the United States. Compilers and assemblers use NLS to support -locale-specific representations of various objects including -floating-point numbers ("." vs "," for separating decimal fractions). -There have been problems reported where the library linked with GCC does -not produce the same floating-point formats that the assembler accepts. -If you have this problem, set the LANG environment variable to "C" or -"En_US". - - - AIX 3.2.5 XLC-1.3 problems - -XLC version 1.3.0.0 distributed with AIX 3.2.5 will miscompile jump.c when -building the stage1 compiler during the bootstrap process. This will cause -GCC to crash and the bootstrap to fail later while compiling libgcc2.c. XLC -version 1.3.0.1 or later fixes this problem. XLC-1.3.0.19 also cannot -bootstrap GCC so please avoid that release as well. You can obtain -XLC-1.3.0.24 by requesting PTF 432238 from IBM, or just ask for the latest -release of XLC-1.3. - -There also have been reports of problems bootstrapping GCC with some older -releases of xlc-1.2.1, including xlc-1.2.1.8. Newer releases of xlc-1.2.1 -do not exhibit this problem: xlc-1.2.1.28 is known to bootstrap properly. - - - AIX 3.2 common-mode support - -AIX common-mode providing transparent support of both the POWER and PowerPC -architectures is usable in AIX 3.2.3 and above but an export file and -support for hidden export via libc.a will not exist until AIX 4.1. libgcc.a -also must be compiled in common-mode. Note that executables generated for -the POWER (RIOS1 and RSC) architecture will run directly on systems using -the MPC601 chip. Common-mode only improves the performance of a single -executable run on both POWER and PowerPC architecture platforms by not using -POWER- or PowerPC-specific instructions and eliminating the need to trap to -emulation (for POWER instructions run on PowerPC). - -To link a common-mode application prior to AIX 4.1 and run it on a system at -AIX level 3.2.3 or above, use the text between the "<>" as an export file -(e.g. milli.exp) - -<><><><><><><><><><><> -#! -__mulh 0x3100 -__mull 0x3180 -__divss 0x3200 -__divus 0x3280 -__quoss 0x3300 -__quous 0x3380 -<><><><><><><><><><><> - -and then link with -Wl,-bI:milli.exp. - - - AIX 4.1 binder - -Due to changes in the way that GCC invokes the binder (linker) for AIX 4.1, -the link step now may produce warnings of duplicate symbols which were not -reported before. The assembly files generated by GCC for AIX always have -included multiple symbol definitions for certain global variable and -function declarations in the original program. The warnings should not -prevent the linker from producing a correct library or runnable executable. |
