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authorljo <ljo@FreeBSD.org>1994-01-05 02:53:40 +0000
committerljo <ljo@FreeBSD.org>1994-01-05 02:53:40 +0000
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+
+ F2C(1) F2C(1)
+
+ NAME
+ f2c - Convert Fortran 77 to C or C++
+
+ SYNOPSIS
+ f2c [ option ... ] file ...
+
+ DESCRIPTION
+ F2c converts Fortran 77 source code in files with names end-
+ ing in `.f' or `.F' to C (or C++) source files in the cur-
+ rent directory, with `.c' substituted for the final `.f' or
+ `.F'. If no Fortran files are named, f2c reads Fortran from
+ standard input and writes C on standard output. File names
+ that end with `.p' or `.P' are taken to be prototype files,
+ as produced by option `-P', and are read first.
+
+ The following options have the same meaning as in f77(1).
+
+ -C Compile code to check that subscripts are within
+ declared array bounds.
+
+ -I2 Render INTEGER and LOGICAL as short, INTEGER*4 as long
+ int. Assume the default libF77 and libI77: allow only
+ INTEGER*4 (and no LOGICAL) variables in INQUIREs.
+ Option `-I4' confirms the default rendering of INTEGER
+ as long int.
+
+ -onetrip
+ Compile DO loops that are performed at least once if
+ reached. (Fortran 77 DO loops are not performed at all
+ if the upper limit is smaller than the lower limit.)
+
+ -U Honor the case of variable and external names. Fortran
+ keywords must be in lower case.
+
+ -u Make the default type of a variable `undefined' rather
+ than using the default Fortran rules.
+
+ -w Suppress all warning messages. If the option is
+ `-w66', only Fortran 66 compatibility warnings are sup-
+ pressed.
+
+ The following options are peculiar to f2c.
+
+ -A Produce ANSI C. Default is old-style C.
+
+ -a Make local variables automatic rather than static
+ unless they appear in a DATA, EQUIVALENCE, NAMELIST, or
+ SAVE statement.
+
+ -C++ Output C++ code.
+
+ -c Include original Fortran source as comments.
+
+ Page 1 Local (printed 2/2/93)
+
+ F2C(1) F2C(1)
+
+ -E Declare uninitialized COMMON to be Extern (overridably
+ defined in f2c.h as extern).
+
+ -ec Place uninitialized COMMON blocks in separate files:
+ COMMON /ABC/ appears in file abc_com.c. Option `-e1c'
+ bundles the separate files into the output file, with
+ comments that give an unbundling sed(1) script.
+
+ -ext Complain about f77(1) extensions.
+
+ -f Assume free-format input: accept text after column 72
+ and do not pad fixed-format lines shorter than 72 char-
+ acters with blanks.
+
+ -72 Treat text appearing after column 72 as an error.
+
+ -g Include original Fortran line numbers in #line lines.
+
+ -h Emulate Fortran 66's treatment of Hollerith: try to
+ align character strings on word (or, if the option is
+ `-hd', on double-word) boundaries.
+
+ -i2 Similar to -I2, but assume a modified libF77 and libI77
+ (compiled with -Df2c_i2), so INTEGER and LOGICAL vari-
+ ables may be assigned by INQUIRE and array lengths are
+ stored in short ints.
+
+ -kr Use temporary values to enforce Fortran expression
+ evaluation where K&R (first edition) parenthesization
+ rules allow rearrangement. If the option is `-krd',
+ use double precision temporaries even for single-
+ precision operands.
+
+ -P Write a file.P of ANSI (or C++) prototypes for defini-
+ tions in each input file.f or file.F. When reading
+ Fortran from standard input, write prototypes at the
+ beginning of standard output. Option -Ps implies -P
+ and gives exit status 4 if rerunning f2c may change
+ prototypes or declarations.
+
+ -p Supply preprocessor definitions to make common-block
+ members look like local variables.
+
+ -R Do not promote REAL functions and operations to DOUBLE
+ PRECISION. Option `-!R' confirms the default, which
+ imitates f77.
+
+ -r Cast values of REAL functions (including intrinsics) to
+ REAL.
+
+ -r8 Promote REAL to DOUBLE PRECISION, COMPLEX to DOUBLE
+ COMPLEX.
+
+ Page 2 Local (printed 2/2/93)
+
+ F2C(1) F2C(1)
+
+ -s Preserve multidimensional subscripts.
+
+ -Tdir
+ Put temporary files in directory dir.
+
+ -w8 Suppress warnings when COMMON or EQUIVALENCE forces
+ odd-word alignment of doubles.
+
+ -Wn Assume n characters/word (default 4) when initializing
+ numeric variables with character data.
+
+ -z Do not implicitly recognize DOUBLE COMPLEX.
+
+ -!bs Do not recognize backslash escapes (\", \', \0, \\, \b,
+ \f, \n, \r, \t, \v) in character strings.
+
+ -!c Inhibit C output, but produce -P output.
+
+ -!I Reject include statements.
+
+ -!i8 Disallow INTEGER*8.
+
+ -!it Don't infer types of untyped EXTERNAL procedures from
+ use as parameters to previously defined or prototyped
+ procedures.
+
+ -!P Do not attempt to infer ANSI or C++ prototypes from
+ usage.
+
+ The resulting C invokes the support routines of f77; object
+ code should be loaded by f77 or with ld(1) or cc(1) options
+ -lF77 -lI77 -lm. Calling conventions are those of f77: see
+ the reference below.
+
+ FILES
+ file.[fF]
+ input file
+
+ *.c output file
+
+ /usr/include/f2c.h
+ header file
+
+ /usr/lib/libF77.a
+ intrinsic function library
+
+ /usr/lib/libI77.a
+ Fortran I/O library
+
+ /lib/libc.a
+ C library, see section 3
+
+ Page 3 Local (printed 2/2/93)
+
+ F2C(1) F2C(1)
+
+ SEE ALSO
+ S. I. Feldman and P. J. Weinberger, `A Portable Fortran 77
+ Compiler', UNIX Time Sharing System Programmer's Manual,
+ Tenth Edition, Volume 2, AT&T Bell Laboratories, 1990.
+
+ DIAGNOSTICS
+ The diagnostics produced by f2c are intended to be self-
+ explanatory.
+
+ BUGS
+ Floating-point constant expressions are simplified in the
+ floating-point arithmetic of the machine running f2c, so
+ they are typically accurate to at most 16 or 17 decimal
+ places.
+ Untypable EXTERNAL functions are declared int.
+
+ Page 4 Local (printed 2/2/93)
+
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