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|
# *** MSUB does some substitutions here ***
# *** grep for $( ***
#
# tries to work like mkdependC
#
# ToDo: strip out all the .h junk
#
($Pgm = $0) =~ s/.*\/([^\/]+)$/\1/;
$Usage = "usage: $Pgm: not done yet\n";
$Status = 0; # just used for exit() status
$Verbose = 0;
$Dashdashes_seen = 0;
$Begin_magic_str = "# DO NOT DELETE: Beginning of C dependencies\n";
$End_magic_str = "# DO NOT DELETE: End of C dependencies\n";
$Obj_suffix = '.o';
@Defines = ();
$Include_dirs = '';
$Col_width = 78; # ignored
$Makefile = '';
@Src_files = ();
&mangle_command_line_args();
if ( ! $Makefile && -f 'makefile' ) {
$Makefile = 'makefile';
} elsif ( ! $Makefile && -f 'Makefile') {
$Makefile = 'Makefile';
} elsif ( ! $Makefile) {
die "$Pgm: no makefile or Makefile found\n";
}
@Depend_lines = ();
%Depend_seen = ();
print STDERR "CPP defines=@Defines\n" if $Verbose;
print STDERR "Include_dirs=$Include_dirs\n" if $Verbose;
foreach $sf (@Src_files) {
# just like lit-inputter
# except it puts each file through CPP and
# a de-commenter (not implemented);
# builds up @Depend_lines
print STDERR "Here we go for source file: $sf\n" if $Verbose;
($of = $sf) =~ s/\.(c|hc)$/$Obj_suffix/;
&slurp_file($sf, 'fh00');
}
# OK, mangle the Makefile
unlink("$Makefile.bak");
rename($Makefile,"$Makefile.bak");
# now copy Makefile.bak into Makefile, rm'ing old dependencies
# and adding the new
open(OMKF,"< $Makefile.bak") || die "$Pgm: can't open $Makefile.bak: $!\n";
open(NMKF,"> $Makefile") || die "$Pgm: can't open $Makefile: $!\n";
select(NMKF);
$_ = <OMKF>;
while ($_ && $_ ne $Begin_magic_str) { # copy through, 'til Begin_magic_str
print $_;
$_ = <OMKF>;
}
while ($_ && $_ ne $End_magic_str) { # delete 'til End_magic_str
$_ = <OMKF>;
}
# insert dependencies
print $Begin_magic_str;
print @Depend_lines;
print $End_magic_str;
while (<OMKF>) { # copy the rest through
print $_;
}
close(NMKF);
close(OMKF);
exit 0;
sub mangle_command_line_args {
while($_ = $ARGV[0]) {
shift(@ARGV);
if ( /^--$/ ) {
$Dashdashes_seen++;
} elsif ( /^-D(.*)/ ) { # recognized wherever they occur
push(@Defines, $_);
} elsif ( /^-I/ ) {
$Include_dirs .= " $_";
} elsif ($Dashdashes_seen != 1) { # not between -- ... --
if ( /^-v$/ ) {
$Verbose++;
} elsif ( /^-f/ ) {
$Makefile = &grab_arg_arg($_);
} elsif ( /^-o/ ) {
$Obj_suffix = &grab_arg_arg($_);
} elsif ( /^-bs/ ) {
$Begin_magic_str = &grab_arg_arg($_) . "\n";
} elsif ( /^-es/ ) {
$End_magic_str = &grab_arg_arg($_) . "\n";
} elsif ( /^-w/ ) {
$Width = &grab_arg_arg($_);
} elsif ( /^-/ ) {
print STDERR "$Pgm: unknown option ignored: $_\n";
} else {
push(@Src_files, $_);
}
} elsif ($Dashdashes_seen == 1) { # where we ignore unknown options
push(@Src_files,$_) if ! /^-/;
}
}
}
sub grab_arg_arg {
local($option) = @_;
local($rest_of_arg);
($rest_of_arg = $option) =~ s/^-.//;
if ($rest_of_arg) {
return($rest_of_arg);
} elsif ($#ARGV >= 0) {
local($temp) = $ARGV[0]; shift(@ARGV);
return($temp);
} else {
die "$Pgm: no argument following $option option\n";
}
}
sub slurp_file { # follows an example in the `open' item in perl man page
local($fname,$fhandle) = @_;
local($depend); # tmp
$fhandle++; # a string increment
$fname = &tidy_dir_names($fname);
unless (open($fhandle, "$(GNUCPP) $Include_dirs @Defines $fname |")) {
die "$Pgm: Can't open $fname: $!\n";
}
line: while (<$fhandle>) {
next line if ! /^#/;
next line if /^#(ident|pragma)/;
chop; # rm trailing newline
$_ = &tidy_dir_names($_);
# strip junk off the front and back
$_ =~ s/^#\s+\d+\s+//;
$_ =~ s/[ 0-9]*$//;
# a little bit of ad-hoc fiddling now:
# don't bother w/ dependencies on /usr/include stuff
# don't bother if it looks like a GCC built-in hdr file
# don't bother with funny yacc-ish files
# don't bother with "literate" .h files (.lh); we'll just
# depend on the de-litified versions (which have better info)
# don't let a file depend on itself
next line if /^\/usr\/include/;
next line if /\/gcc-lib\/[^\/\n]+\/[\.0-9]+\/include\//;
next line if /\/yaccpar/;
next line if /\/bison\.(simple|hairy)/;
next line if /\.lh$/;
next line if $_ eq $fname;
print STDERR "$fname :: $_\n" if $Verbose;
# ToDo: some sanity checks that we still have something reasonable?
$depend = "$of : $_\n";
next line if $Depend_seen{$depend}; # already seen this one...
# OK, it's a new one.
push (@Depend_lines, $depend);
$Depend_seen{$depend} = 1;
}
close($fhandle);
}
sub tidy_dir_names { # rm various pernicious dir-name combinations...
local($str) = @_;
$str =~ s|/[^/.][^/]*/\.\.||g; # nuke: /<dir>/..
$str =~ s|/\.[^.][^/]*/\.\.||g; # nuke: /./.. (and others)
$str =~ s|"||g;
$str =~ s| \./| |;
$str;
}
|
