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+#!/usr/bin/env perl
+# a script for use by autoconf to make the Makefiles
+# from the Makefile.in's
+#
+# the original autoconf mechanism first splits all substitutions into groups
+# of ca. 90, and than invokes sed for _every_ Makefile.in and every group
+# (so around 2-3 times per Makefile.in). So this takes forever, as sed
+# has to recompile the regexps every time.
+#
+# this script does better. It changes all Makefile.ins in one process.
+# in kdelibs the time for building Makefile went down from 2:59 min to 13 sec!
+#
+# written by Michael Matz <matz@kde.org>
+# adapted by Dirk Mueller <mueller@kde.org>
+
+# This file is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Library General Public License for more details.
+
+# You should have received a copy of the GNU Library General Public License
+# along with this library; see the file COPYING.LIB. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+use strict;
+
+use File::Path;
+
+my $ac_subs=$ARGV[0];
+my $ac_sacfiles = $ARGV[1];
+my $ac_given_srcdir=$ARGV[2];
+my $ac_given_INSTALL=$ARGV[3];
+
+my @comp_match;
+my @comp_subs;
+
+#print "ac_subs=$ac_subs\n";
+#print "ac_sacfiles=$ac_sacfiles\n";
+#print "ac_given_srcdir=$ac_given_srcdir\n";
+#print "ac_given_INSTALL=$ac_given_INSTALL\n";
+
+my $configure_input;
+my ($srcdir, $top_srcdir);
+my $INSTALL;
+my $bad_perl = ($] < 5.005);
+my $created_file_count = 0;
+
+open(CF, "< $ac_subs") || die "can't open $ac_subs: $!";
+my @subs = <CF>;
+my $pat;
+close(CF);
+chomp @subs;
+@comp_match=();
+@comp_subs=();
+
+if ($bad_perl) {
+ print "Using perl older than version 5.005\n";
+ foreach $pat (@subs) {
+ if ( ($pat =~ m/s%([^%]*)%([^%]*)%g/ )
+ || ($pat =~ m/s%([^%]*)%([^%]*)%;t/ )
+ || ($pat =~ m/s,([^,]*),(.*),;t/)
+ || ($pat =~ m%s/([^/]*)/([^/]*)/g% )
+ || ($pat =~ m%s/([^/]*)/([^/]*)/;t% )
+ ) {
+ # form : s%bla%blubb%g
+ # or s%bla%blubb%;t t (autoconf > 2.13 and < 2.52 ?)
+ # or s,bla,blubb,;t t (autoconf 2.52)
+ my $srch = $1;
+ my $repl = $2;
+ $repl =~ s/\\(.)/$1/g;
+ push @comp_subs, make_closure($srch, $repl);
+
+ } elsif ( ($pat =~ /%([^%]*)%d/ )
+ || ($pat =~ m%/([^/]*)/d% )
+ ) {
+ push @comp_subs, make_closure($1, "");
+ } else {
+ die "Uhh. Malformed pattern in $ac_subs ($pat)"
+ unless ( $pat =~ /^\s*$/ ); # ignore white lines
+ }
+ }
+} else {
+ foreach $pat (@subs) {
+ if ( ($pat =~ /s%([^%]*)%([^%]*)%g/ ) ||
+ ($pat =~ /s%([^%]*)%([^%]*)%;t/ ) ||
+ ($pat =~ /s,([^,]*),(.*),;t/) ) {
+ # form : s%bla%blubb%g
+ # or s%bla%blubb%;t t (autoconf > 2.13 and < 2.52 ?)
+ # or s,bla,blubb,;t t (autoconf 2.52)
+ my $srch = $1;
+ my $repl = $2;
+ push @comp_match, eval "qr/\Q$srch\E/"; # compile match pattern
+ $repl =~ s/\\(.)/$1/g;
+ push @comp_subs, $repl;
+ } elsif ( ($pat =~ /%([^%]*)%d/ )
+ || ($pat =~ m%/([^/]*)/d% )
+ ) {
+ push @comp_match, eval "qr/\Q$1\E/";
+ push @comp_subs, "";
+ } else {
+ die "Uhh. Malformed pattern in $ac_subs ($pat)"
+ unless ( $pat =~ /^\s*$/ ); # ignore white lines
+ }
+ }
+}
+undef @subs;
+
+# read the list of files to be patched, form:
+# ./Makefile arts/Makefile arts/examples/Makefile arts/flow/Makefile
+
+open(CF, "< $ac_sacfiles") || die "can't open $ac_sacfiles: $!";
+my @ac_files = <CF>;
+close(CF);
+chomp @ac_files;
+
+
+my $ac_file;
+foreach $ac_file (@ac_files) {
+ next if $ac_file =~ /\.\./;
+ next if $ac_file =~ /^\s*$/;
+ my $ac_file_in;
+ my ($ac_dir, $ac_dots, $ac_dir_suffix);
+
+ if ($ac_file =~ /.*:.*/ ) {
+ ($ac_file_in = $ac_file) =~ s%[^:]*:%%;
+ $ac_file =~ s%:.*%%;
+ } else {
+ $ac_file_in = $ac_file.".in";
+ }
+
+# Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories.
+
+# Remove last slash and all that follows it. Not all systems have dirname.
+ ($ac_dir = $ac_file) =~ s%/[^/][^/]*$%%;
+ if ( ($ac_dir ne $ac_file) && ($ac_dir ne ".")) {
+# The file is in a subdirectory.
+ if (! -d "$ac_dir") { mkpath "$ac_dir", 0, 0777; }
+ ($ac_dir_suffix = $ac_dir) =~ s%^./%%;
+ $ac_dir_suffix="/".$ac_dir_suffix;
+# A "../" for each directory in $ac_dir_suffix.
+ ($ac_dots = $ac_dir_suffix) =~ s%/[^/]*%../%g;
+ } else {
+ $ac_dir_suffix="";
+ $ac_dots="";
+ }
+
+ if ($ac_given_srcdir eq ".") {
+ $srcdir=".";
+ if ($ac_dots) {
+ ( $top_srcdir = $ac_dots) =~ s%/$%%;
+ } else { $top_srcdir="."; }
+ } elsif ($ac_given_srcdir =~ m%^/%) {
+ $srcdir=$ac_given_srcdir.$ac_dir_suffix;
+ $top_srcdir = $ac_given_srcdir;
+ } else {
+ $srcdir = $ac_dots.$ac_given_srcdir.$ac_dir_suffix;
+ $top_srcdir = $ac_dots.$ac_given_srcdir;
+ }
+
+ if ($ac_given_INSTALL) {
+ if ($ac_given_INSTALL =~ m%^/% ) {
+ $INSTALL = $ac_given_INSTALL;
+ } else {
+ $INSTALL = $ac_dots.$ac_given_INSTALL;
+ }
+ }
+
+ print "fast creating $ac_file\n";
+ unlink $ac_file;
+ my $ac_comsub="";
+ my $fname=$ac_file_in;
+ $fname =~ s%.*/%%;
+ $configure_input="$ac_file. Generated from $fname by config.pl.";
+
+ my $ac_file_inputs;
+ ($ac_file_inputs = $ac_file_in) =~ s%^%$ac_given_srcdir/%;
+ $ac_file_inputs =~ s%:% $ac_given_srcdir/%g;
+
+ patch_file($ac_file, $ac_file_inputs);
+ ++$created_file_count;
+}
+
+print "config.pl: fast created $created_file_count file(s).\n";
+
+sub patch_file {
+ my ($outf, $infiles) = @_;
+ my $filedata;
+ my @infiles=split(' ', $infiles);
+ my $i=0;
+ my $name;
+
+ foreach $name (@infiles) {
+ if (open(CF, "< $name")) {
+ while (<CF>) {
+ $filedata .= $_;
+ }
+ close(CF);
+ } else {
+ print STDERR "can't open $name: $!"."\n";
+ }
+ }
+
+ $filedata =~ s%\@configure_input\@%$configure_input%g;
+ $filedata =~ s%\@srcdir\@%$srcdir%g;
+ $filedata =~ s%\@top_srcdir\@%$top_srcdir%g;
+ $filedata =~ s%\@INSTALL\@%$INSTALL%g;
+
+ if ($bad_perl) {
+ while ($i <= $#comp_subs) {
+ my $ref = $comp_subs[$i];
+ &$ref(\$filedata);
+ $i++;
+ }
+ } else {
+ while ($i <= $#comp_match) {
+ $filedata =~ s/$comp_match[$i]/$comp_subs[$i]/g;
+ $i++;
+ }
+ }
+ open(CF, "> $outf") || die "can't create $outf: $!";
+ print CF $filedata;
+ close(CF);
+}
+
+sub make_closure {
+ my ($pat, $sub) = @_;
+ my $ret = eval "return sub { my \$ref=shift; \$\$ref =~ s%\Q$pat\E%\Q$sub\E%g; }";
+ if ($@) {
+ print "can't create CODE: $@\n";
+ }
+ return $ret;
+}