F77(1) F77(1)
NAME
f77 - Fortran 77 compiler
SYNOPSIS
f77 [ option ... ] file ...
DESCRIPTION
F77 is a Fortran 77 compiler. It accepts several types of
arguments:
Arguments whose names end with `.f' are taken to be Fortran
77 source programs; they are compiled, and each object pro-
gram is left on the file in the current directory whose name
is that of the source with `.o' substituted for `.f'.
Arguments whose names end with `.r' or `.e' are taken to be
Ratfor or EFL source programs, respectively; these are first
transformed by the appropriate preprocessor, then compiled
by f77.
In the same way, arguments whose names end with `.c' or `.s'
are taken to be C or assembly source programs and are com-
piled or assembled, producing a `.o' file.
The following options have the same meaning as in cc(1). See
ld(1) for load-time options.
-c Suppress loading and produce `.o' files for each source
file.
-g Have the compiler produce additional symbol table
information for sdb(A) or pi(9.1).
-w Suppress all warning messages. If the option is
`-w66', only Fortran 66 compatibility warnings are sup-
pressed.
-p Prepare object files for profiling, see prof(1).
-O Invoke an object-code optimizer.
-S Compile the named programs, and leave the assembler-
language output on corresponding files suffixed `.s'.
(No `.o' is created.).
-o output
Name the final output file output instead of `a.out'.
The following options are peculiar to f77.
F77(1) F77(1)
-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 Make the default type of a variable `undefined' rather
than using the default Fortran rules.
-C Compile code to check that subscripts are within
declared array bounds.
-I2 Render INTEGER and LOGICAL as short, INTEGER*4 as long.
Allow only INTEGER*4 (and no LOGICAL) variables in
INQUIREs.
-U Honor the case of variable and external names. Fortran
keywords must be in lower case.
-F Apply EFL and Ratfor preprocessors to relevant files,
put the results in the files with the suffix changed to
`.f', but do not compile.
-m Apply the M4 preprocessor to each `.r' or `.e' file
before transforming it with the Ratfor or EFL prepro-
cessor.
-Ex Use the string x as an EFL option in processing `.e'
files.
-Rx Use the string x as a Ratfor option in processing `.r'
files.
Other arguments are taken to be either loader option argu-
ments, or F77-compatible object programs, typically produced
by an earlier run, or perhaps libraries of F77-compatible
routines. These programs, together with the results of any
compilations specified, are loaded (in the order given) to
produce an executable program with name `a.out'.
FILES
file.[fresc] input file
*.o object file
loaded output
temporary
compiler
pass 2
optional optimizer
intrinsic function library
Fortran I/O library
C library, see section 3
SEE ALSO
F77(1) F77(1)
prof(1), cc(1), ld(1), efl(A), ratfor(A)
S. I. Feldman and P. J. Weinberger, `A Portable Fortran 77
Compiler', this manual, Volume 2
DIAGNOSTICS
The diagnostics produced by f77 itself are intended to be
self-explanatory. Occasional messages may be produced by
the loader.