Help Files: Fortran77: Introduction

     HELP                      Sep. 15, 1984                 F77/INTRO



                 Introduction to the f77 Fortran Compiler

     This help file is an introduction to the use of  Fortran  on  the
     VAX  UNIX  systems.   For a more tutorial introduction, see "help
     f77 tutorial".

     Source files for the f77 compiler must have filenames  ending  in
     ".f".  To compile and load a program with source contained in the
     file 'prog.f', type "f77 prog.f". Two files will  be  created  in
     your directory:

             prog.o          The compiled, relocatable object file.
             a.out           The loaded, executable binary file.

     To run the program, type "a.out".  The general  f77  command  for
     source in several files is:

             f77 prog.f sub1.f sub2.f ... subn.f

     This command will compile all the named ".f"  files  (creating  a
     ".o" file for each) and load all the object files together into a
     single executable file called 'a.out'.

     To save time, object files that don't need to be  recompiled  may
     be  substituted for the corresponding source files in the command
     above.  For example, if prog.f and sub2.f have been changed since
     they  were  compiled,  but  the  other source files have not been
     changed since last compiled, type:

             f77 prog.f sub1.o sub2.f sub3.o ... subn.o

     If all the files ending in '.o' and '.f' in  this  directory  are
     part of this program, you could simplify this to:

             f77 prog.f sub2.f *.o

     For information on options to use with f77,  see  "help  f77  op-
     tions".   For  documentation  on  UNIX  and  f77,  see  "help f77
     online_doc" and "help f77 printed_doc".  For information on  what
     to  do  if  your  program  crashed, see "help f77 error_msgs" and
     "help f77 debugging".  For a summary of other f77 help files, see
     "help f77 general".