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cc_flags.pl
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cc_flags.pl
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#! perl
################################################################################
# Copyright (C) 2001-2003, Parrot Foundation.
# $Id$
################################################################################
=head1 NAME
tools/dev/cc_flags.pl - Process compiler flags
=head1 SYNOPSIS
% perl tools/dev/cc_flags.pl transform compiler flags
=head1 DESCRIPTION
This script is used in a F<Makefile> to process the flags to pass to the
compiler for each C file.
See F<config/gen/makefiles/CFLAGS.in> for the transformation file format.
=head1 SEE ALSO
F<config/gen/cflags/root.in>.
=cut
################################################################################
use strict;
use warnings;
my $return_only;
my $verbose;
if ($ARGV[0] eq '--return-only') {
$return_only = 1;
shift;
}
if ($ARGV[0] eq '-v') {
$verbose = 1;
shift;
}
my $cflags = shift;
open my $F, '<', $cflags or die "open $cflags: $!\n";
my @options;
while (<$F>) {
chomp;
s/#.*//;
next unless /\S/;
my $regex;
if (s/^\{(.*?)\}\s*//) {
next unless $1;
$regex = qr/$1/;
}
elsif (s/^(\S+)\s*//) {
$regex = qr/^\Q$1\E$/;
}
else {
die "syntax error in $cflags: line $., $_\n";
}
for ( ; ; ) {
if (s/^([-+])\{(.*?)\}\s*//) {
next unless $2;
my ( $sign, $options ) = ( $1, $2 );
foreach my $option ( split ' ', $options ) {
push @options, [ $regex, $sign, $option ];
}
}
elsif (s{s(.)(.*?)\1(.*?)\1([imsx]*)\s*}{}) {
my $mod = "";
$mod = "(?$4)" if $4;
push @options, [ $regex, 's', "$mod$2", $3 ];
}
elsif (/\S/) {
die "syntax error in $cflags: line $., $_\n";
}
else {
last;
}
}
}
my ($cfile) = grep /\.c$/, @ARGV;
my ( $inject_point, $where );
foreach (@ARGV) {
last if $_ eq '';
++$where;
}
if ($where) {
# Found a "" - remove it
splice @ARGV, $where, 1;
$inject_point = $where;
}
else {
$inject_point = 1;
}
if ($cfile) {
foreach my $option (@options) {
if ( $cfile =~ $option->[0] ) {
if ( $option->[1] eq '+' ) {
splice @ARGV, $inject_point, 0, $option->[2];
}
elsif ( $option->[1] eq '-' ) {
@ARGV = grep { $_ ne $option->[2] } @ARGV;
}
else {
foreach my $arg (@ARGV) {
$arg =~ s/$option->[2]/$option->[3]/;
}
}
}
}
# print "@ARGV\n";
# Visual C++ already prints the source file name...
if ( $ARGV[0] =~ /cl(?:\.exe)?/i ) {
# ...but only the file name, so we print the path
# to the directory first
if ( $cfile =~ /(.*[\/\\])/ ) {
print $1;
}
}
else {
print "$cfile\n";
}
}
if ($return_only) {
print join ' ', @ARGV;
exit;
}
if ($verbose) {
print join ' ', @ARGV;
}
exit system(@ARGV) / 256;
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4: