makemake

#! /usr/bin/perl
#
# Usage: makemake {<program name> {<F90 compiler or fc or f77 or cc or c>}}
#
# Generate a Makefile from the sources in the current directory.  The source
# files may be in either C, FORTRAN 77, Fortran 90 or some combination of
# these languages.  If the F90 compiler specified is cray or parasoft, then
# the Makefile generated will conform to the conventions of these compilers.
# To run makemake, it will be necessary to modify the first line of this script
# to point to the actual location of Perl on your system.
#
# Written by Michael Wester <wester@math.unm.edu> February 16, 1995
# Cotopaxi (Consulting), Albuquerque, New Mexico
#
open(MAKEFILE, "> Makefile");
#
print MAKEFILE "PROG =\t$ARGV[0]\n\n";
#
# Source listing
#
print MAKEFILE "SRCS =\t";
@srcs = <*.f90 *.f *.F *.c>;
&PrintWords(8, 0, @srcs);
print MAKEFILE "\n\n";
#
# Object listing
#
print MAKEFILE "OBJS =\t";
@objs = @srcs;
foreach (@objs) { s/\.[^.]+$/.o/ };
&PrintWords(8, 0, @objs);
print MAKEFILE "\n\n";
#
# Define common macros
#
print MAKEFILE "LIBS =\t\n\n";
print MAKEFILE "CC = cc\n";
print MAKEFILE "CFLAGS = -O\n";
print MAKEFILE "FC = f77\n";
print MAKEFILE "FFLAGS = -O\n";
print MAKEFILE "F90 = f90\n";
print MAKEFILE "F90FLAGS = -O\n";
print MAKEFILE "LDFLAGS = -s\n\n";
#
# make
#
print MAKEFILE "all: \$(PROG)\n\n";
print MAKEFILE "\$(PROG): \$(OBJS)\n";
print MAKEFILE "\t\$(", &LanguageCompiler($ARGV[1], @srcs);
print MAKEFILE ") \$(LDFLAGS) -o \$@ \$(OBJS) \$(LIBS)\n\n";
#
# make clean
#
print MAKEFILE "clean:\n";
print MAKEFILE "\trm -f \$(PROG) \$(OBJS) *.mod\n\n";
#
# Make .f90 a valid suffix
#
print MAKEFILE ".SUFFIXES: \$(SUFFIXES) .f90\n\n";
#
# .f90 -> .o
#
print MAKEFILE ".f90.o:\n";
print MAKEFILE "\t\$(F90) \$(F90FLAGS) -c \$<\n\n";
#
# Dependency listings
#
&MakeDependsf90($ARGV[1]);
&MakeDepends("*.f *.F", '^\s*include\s+["\']([^"\']+)["\']');
&MakeDepends("*.c",     '^\s*#\s*include\s+["\']([^"\']+)["\']');

#
# &PrintWords(current output column, extra tab?, word list); --- print words
#    nicely
#
sub PrintWords {
  local($columns) = 78 - shift(@_);
  local($extratab) = shift(@_);
  local($wordlength);
  #
  print MAKEFILE @_[0];
  $columns -= length(shift(@_));
  foreach $word (@_) {
    $wordlength = length($word);
    if ($wordlength + 1 < $columns) {
      print MAKEFILE " $word";
      $columns -= $wordlength + 1;
    }
    else {
      #
      # Continue onto a new line
      #
      if ($extratab) {
        print MAKEFILE " \\\n\t\t$word";
        $columns = 62 - $wordlength;
      }
      else {
        print MAKEFILE " \\\n\t$word";
        $columns = 70 - $wordlength;
      }
    }
  }
}

#
# &LanguageCompiler(compiler, sources); --- determine the correct language
#    compiler
#
sub LanguageCompiler {
  local($compiler) = &toLower(shift(@_));
  local(@srcs) = @_;
  #
  if (length($compiler) > 0) {
    CASE: {
      grep(/^$compiler$/, ("fc", "f77")) &&
      do { $compiler = "FC"; last CASE; };
      grep(/^$compiler$/, ("cc", "c"))   &&
      do { $compiler = "CC"; last CASE; };
      $compiler = "F90";
    }
  }
  else {
    CASE: {
      grep(/\.f90$/, @srcs)   && do { $compiler = "F90"; last CASE; };
      grep(/\.(f|F)$/, @srcs) && do { $compiler = "FC";  last CASE; };
      grep(/\.c$/, @srcs)     && do { $compiler = "CC";  last CASE; };
      $compiler = "???";
    }
  }
  $compiler;
}

#
# &toLower(string); --- convert string into lower case
#
sub toLower {
  local($string) = @_[0];
  $string =~ tr/A-Z/a-z/;
  $string;
}

#
# &uniq(sorted word list); --- remove adjacent duplicate words
#
sub uniq {
  local(@words);
  foreach $word (@_) {
    if ($word ne $words[$#words]) {
      push(@words, $word);
    }
  }
  @words;
}

#
# &MakeDepends(language pattern, include file sed pattern); --- dependency
#    maker
#
sub MakeDepends {
  local(@incs);
  local($lang) = @_[0];
  local($pattern) = @_[1];
  #
  foreach $file (<${lang}>) {
    open(FILE, $file) || warn "Cannot open $file: $!\n";
    while (<FILE>) {
      /$pattern/i && push(@incs, $1);
    }
    if (defined @incs) {
      $file =~ s/\.[^.]+$/.o/;
      print MAKEFILE "$file: ";
      &PrintWords(length($file) + 2, 0, @incs);
      print MAKEFILE "\n";
      undef @incs;
    }
  }
}

#
# &MakeDependsf90(f90 compiler); --- FORTRAN 90 dependency maker
#
sub MakeDependsf90 {
  local($compiler) = &toLower(@_[0]);
  local(@dependencies);
  local(%filename);
  local(@incs);
  local(@modules);
  local($objfile);
  #
  # Associate each module with the name of the file that contains it
  #
  foreach $file (<*.f90>) {
    open(FILE, $file) || warn "Cannot open $file: $!\n";
    while (<FILE>) {
      /^\s*module\s+([^\s!]+)/i &&
      ($filename{&toLower($1)} = $file) =~ s/\.f90$/.o/;
    }
  }
  #
  # Print the dependencies of each file that has one or more include's or
  # references one or more modules
  #
  foreach $file (<*.f90>) {
    open(FILE, $file);
    while (<FILE>) {
      /^\s*include\s+["\']([^"\']+)["\']/i && push(@incs, $1);
      /^\s*use\s+([^\s,!]+)/i && push(@modules, &toLower($1));
    }
    if (defined @incs || defined @modules) {
      ($objfile = $file) =~ s/\.f90$/.o/;
      print MAKEFILE "$objfile: ";
      undef @dependencies;
      foreach $module (@modules) {
        push(@dependencies, $filename{$module});
      }
      @dependencies = &uniq(sort(@dependencies));
      &PrintWords(length($objfile) + 2, 0,
        @dependencies, &uniq(sort(@incs)));
      print MAKEFILE "\n";
      undef @incs;
      undef @modules;
      #
      # Cray F90 compiler
      #
      if ($compiler eq "cray") {
        print MAKEFILE "\t\$(F90) \$(F90FLAGS) -c ";
        foreach $depend (@dependencies) {
          push(@modules, "-p", $depend);
        }
        push(@modules, $file);
        &PrintWords(30, 1, @modules);
        print MAKEFILE "\n";
        undef @modules;
      }
      #
      # ParaSoft F90 compiler
      #
      if ($compiler eq "parasoft") {
        print MAKEFILE "\t\$(F90) \$(F90FLAGS) -c ";
        foreach $depend (@dependencies) {
          $depend =~ s/\.o$/.f90/;
          push(@modules, "-module", $depend);
        }
        push(@modules, $file);
        &PrintWords(30, 1, @modules);
        print MAKEFILE "\n";
        undef @modules;
      }
    }
  }
}