
     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
	  current 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
	       suppressed.

	  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.

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     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.

	  -g   Include original	Fortran	line numbers as	comments.

	  -h   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 pro-
	       cedures defined in each input file.f or file.F.	When
	       reading Fortran from standard input, write prototypes
	       at the beginning	of standard output.  Implies -A	unless
	       option `-C++' is	present.  Option -Ps implies -P	, and
	       gives exit status 4 if rerunning	f2c may	change proto-
	       types 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.

	  -Tdir
	       Put temporary files in directory	dir.

	  -w8  Suppress	warnings when COMMON or	EQUIVALENCE forces
	       odd-word	alignment of doubles.

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     F2C(1)							F2C(1)

	  -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.

	  -!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

     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

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     F2C(1)							F2C(1)

	  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.

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