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+. \" Definitions of F, L and LR for the benefit of systems
+. \" whose -man lacks them...
+.de F
+.nh
+.if n \%\&\\$1
+.if t \%\&\f(CW\\$1\fR
+.hy 14
+..
+.de L
+.nh
+.if n \%`\\$1'
+.if t \%\&\f(CW\\$1\fR
+.hy 14
+..
+.de LR
+.nh
+.if n \%`\\$1'\\$2
+.if t \%\&\f(CW\\$1\fR\\$2
+.hy 14
+..
+.TH F2C 1
+.CT 1 prog_other
+.SH NAME
+f2c \- Convert Fortran 77 to C or C++
+. \" f\^2c changed to f2c in the previous line for the benefit of
+. \" people on systems (e.g. Sun systems) whose makewhatis cannot
+. \" cope with troff formatting commands.
+.SH SYNOPSIS
+.B f\^2c
+[
+.I option ...
+]
+.I file ...
+.SH DESCRIPTION
+.I F2c
+converts Fortran 77 source code in
+.I files
+with names ending in
+.L .f
+or
+.L .F
+to C (or C++) source files in the
+current directory, with
+.L .c
+substituted
+for the final
+.L .f
+or
+.LR .F .
+If no Fortran files are named,
+.I f\^2c
+reads Fortran from standard input and
+writes C on standard output.
+.I File
+names that end with
+.L .p
+or
+.L .P
+are taken to be prototype
+files, as produced by option
+.LR -P ,
+and are read first.
+.PP
+The following options have the same meaning as in
+.IR f\^77 (1).
+.TP
+.B -C
+Compile code to check that subscripts are within declared array bounds.
+.TP
+.B -I2
+Render INTEGER and LOGICAL as short,
+INTEGER\(**4 as long int.  Assume the default \fIlibF77\fR
+and \fIlibI77\fR:  allow only INTEGER\(**4 (and no LOGICAL)
+variables in INQUIREs.  Option
+.L -I4
+confirms the default rendering of INTEGER as long int.
+.TP
+.BI -I dir
+Look for a non-absolute include file first in the directory of the
+current input file, then in directories specified by \f(CW-I\fP
+options (one directory per option).  Options
+\f(CW-I2\fP and \f(CW-I4\fP
+have precedence, so, e.g., a directory named \f(CW2\fP
+should be specified by \f(CW-I./2\fP .
+.TP
+.B -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.)
+.TP
+.B -U
+Honor the case of variable and external names.  Fortran keywords must be in
+.I
+lower
+case.
+.TP
+.B -u
+Make the default type of a variable `undefined' rather than using the default Fortran rules.
+.TP
+.B -w
+Suppress all warning messages, or, if the option is
+.LR -w66 ,
+just Fortran 66 compatibility warnings.
+.PP
+The following options are peculiar to
+.IR f\^2c .
+.TP
+.B -A
+Produce
+.SM ANSI
+C.
+Default is old-style C.
+.TP
+.B -a
+Make local variables automatic rather than static
+unless they appear in a
+.SM "DATA, EQUIVALENCE, NAMELIST,"
+or
+.SM SAVE
+statement.
+.TP
+.B -C++
+Output C++ code.
+.TP
+.B -c
+Include original Fortran source as comments.
+.TP
+.B -cd
+Do not recognize cdabs, cdcos, cdexp, cdlog, cdsin, and cdsqrt
+as synonyms for the double complex intrinsics
+zabs, zcos, zexp, zlog, zsin, and zsqrt, respectively,
+nor dreal as a synonym for dble.
+.TP
+.BI -d dir
+Write
+.L .c
+files in directory
+.I dir
+instead of the current directory.
+.TP
+.B -E
+Declare uninitialized
+.SM COMMON
+to be
+.B Extern
+(overridably defined in
+.F f2c.h
+as
+.B extern).
+.TP
+.B -ec
+Place uninitialized
+.SM COMMON
+blocks in separate files:
+.B COMMON /ABC/
+appears in file
+.BR abc_com.c .
+Option
+.LR -e1c
+bundles the separate files
+into the output file, with comments that give an unbundling
+.IR sed (1)
+script.
+.TP
+.B -ext
+Complain about
+.IR f\^77 (1)
+extensions.
+.TP
+.B -f
+Assume free-format input: accept text after column 72 and do not
+pad fixed-format lines shorter than 72 characters with blanks.
+.TP
+.B -72
+Treat text appearing after column 72 as an error.
+.TP
+.B -g
+Include original Fortran line numbers in \f(CW#line\fR lines.
+.TP
+.B -h
+Emulate Fortran 66's treatment of Hollerith: try to align character strings on
+word (or, if the option is
+.LR -hd ,
+on double-word) boundaries.
+.TP
+.B -i2
+Similar to
+.BR -I2 ,
+but assume a modified
+.I libF77
+and
+.I libI77
+(compiled with
+.BR -Df\^2c_i2 ),
+so
+.SM INTEGER
+and
+.SM LOGICAL
+variables may be assigned by
+.SM INQUIRE
+and array lengths are stored in short ints.
+.TP
+.B -i90
+Do not recognize the Fortran 90 bit-manipulation intrinsics
+btest, iand, ibclr, ibits, ibset, ieor, ior, ishft, and ishftc.
+.TP
+.B -kr
+Use temporary values to enforce Fortran expression evaluation
+where K&R (first edition) parenthesization rules allow rearrangement.
+If the option is
+.LR -krd ,
+use double precision temporaries even for single-precision operands.
+.TP
+.B -P
+Write a
+.IB file .P
+of ANSI (or C++) prototypes
+for definitions in each input
+.IB file .f
+or
+.IB file .F .
+When reading Fortran from standard input, write prototypes
+at the beginning of standard output.  Option
+.B -Ps
+implies
+.B -P
+and gives exit status 4 if rerunning
+.I f\^2c
+may change prototypes or declarations.
+.TP
+.B -p
+Supply preprocessor definitions to make common-block members
+look like local variables.
+.TP
+.B -R
+Do not promote
+.SM REAL
+functions and operations to
+.SM DOUBLE PRECISION.
+Option
+.L -!R
+confirms the default, which imitates
+.IR f\^77 .
+.TP
+.B -r
+Cast REAL arguments of intrinsic functions and values of REAL
+functions (including intrinsics) to REAL.
+.TP
+.B -r8
+Promote
+.SM REAL
+to
+.SM DOUBLE PRECISION, COMPLEX
+to
+.SM DOUBLE COMPLEX.
+.TP
+.B -s
+Preserve multidimensional subscripts.  Suppressed by option
+.L -C
+\&.
+.TP
+.BI -T dir
+Put temporary files in directory
+.I dir.
+.TP
+.B -w8
+Suppress warnings when
+.SM COMMON
+or
+.SM EQUIVALENCE
+forces odd-word alignment of doubles.
+.TP
+.BI -W n
+Assume
+.I n
+characters/word (default 4)
+when initializing numeric variables with character data.
+.TP
+.B -z
+Do not implicitly recognize
+.SM DOUBLE COMPLEX.
+.TP
+.B -!bs
+Do not recognize \fIb\fRack\fIs\fRlash escapes
+(\e", \e', \e0, \e\e, \eb, \ef, \en, \er, \et, \ev) in character strings.
+.TP
+.B -!c
+Inhibit C output, but produce
+.B -P
+output.
+.TP
+.B -!I
+Reject
+.B include
+statements.
+.TP
+.B -!i8
+Disallow
+.SM INTEGER*8.
+.TP
+.B -!it
+Don't infer types of untyped
+.SM EXTERNAL
+procedures from use as parameters to previously defined or prototyped
+procedures.
+.TP
+.B -!P
+Do not attempt to infer
+.SM ANSI
+or C++
+prototypes from usage.
+.PP
+The resulting C invokes the support routines of
+.IR f\^77 ;
+object code should be loaded by
+.I f\^77
+or with
+.IR ld (1)
+or
+.IR cc (1)
+options
+.BR "-lF77 -lI77 -lm" .
+Calling conventions
+are those of
+.IR f\&77 :
+see the reference below.
+.br
+.SH FILES
+.TP
+.nr )I 1.75i
+.IB file .[fF]
+input file
+.TP
+.B *.c
+output file
+.TP
+.F /usr/include/f2c.h
+header file
+.TP
+.F /usr/lib/libF77.a
+intrinsic function library
+.TP
+.F /usr/lib/libI77.a
+Fortran I/O library
+.TP
+.F /lib/libc.a
+C library, see section 3
+.SH "SEE ALSO"
+S. I. Feldman and
+P. J. Weinberger,
+`A Portable Fortran 77 Compiler',
+\fIUNIX Time Sharing System Programmer's Manual\fR,
+Tenth Edition, Volume 2, AT&T Bell Laboratories, 1990.
+.SH DIAGNOSTICS
+The diagnostics produced by
+.I f\^2c
+are intended to be
+self-explanatory.
+.SH BUGS
+Floating-point constant expressions are simplified in
+the floating-point arithmetic of the machine running
+.IR f\^2c ,
+so they are typically accurate to at most 16 or 17 decimal places.
+.br
+Untypable
+.SM EXTERNAL
+functions are declared
+.BR int .