32v 1m f77

F77(1) UNIX Programmer's Manual F77(1)

NAME

    f77 - Fortran 77 compiler

SYNOPSIS

    f77 [ option ] ... file ...

DESCRIPTION

    _F_7_7 is the UNIX 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 _c_c(1).
    See _l_d(1) for load-time options.

    -c   Suppress loading and produce `.o' files for each source
         file.

    -p   Prepare object files for profiling, see _p_r_o_f(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.).

    -f   Use a floating point interpreter (for PDP11's that lack
         11/70-style floating point).

    -o output
         Name the final output file _o_u_t_p_u_t instead of `a.out'.

    The following options are peculiar to _f_7_7.

    -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.

    -w   Suppress all warning messages.  If the option is
         `-w66', only Fortran 66 compatibility warnings are
         suppressed.

    -F   Apply EFL and Ratfor preprocessor to relevant files,
         put the result in the file 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.

    -E_x  Use the string _x as an EFL option in processing `.e'
         files.

    -R_x  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
    file.o              object file
    a.out               loaded output
    /usr/lib/f77pass1   compiler
    /lib/f1             pass 2
    /lib/c2             optional optimizer
    /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, P. J. Weinberger, _A _P_o_r_t_a_b_l_e _F_o_r_t_r_a_n _7_7 _C_o_m_-
    _p_i_l_e_r
    prof(1), cc(1), ld(1)

DIAGNOSTICS

    The diagnostics produced by _f_7_7 itself are intended to be
    self-explanatory.  Occasional messages may be produced by
    the loader.

BUGS

    The Fortran 66 subset of the language has been exercised
    extensively; the newer features have not.