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|
#!/usr/bin/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@ifh.de>
#
# the first part was done by looking at the config.status files generated
# by configure.
#
my $ac_cs_root=$ARGV[0];
my $ac_given_srcdir=$ARGV[1];
my $ac_given_INSTALL=$ARGV[2];
# print "ac_cs_root=$ac_cs_root\n";
# print "ac_given_srcdir=$ac_given_srcdir\n";
# print "ac_given_INSTALL=$ac_given_INSTALL\n";
my ($srcdir, $top_srcdir);
my $INSTALL;
my $bad_perl = ($] < 5.005);
open(CF, "< $ac_cs_root.subs") || die "can't open $ac_cs_root.subs: $!";
my @subs = <CF>;
close(CF);
chomp @subs;
@comp_match=();
@comp_subs=();
if ($bad_perl) {
print "Using perl older than version 5.005\n";
foreach my $pat (@subs) {
if ( ($pat =~ /s%([^%]*)%([^%]*)%g/ )
|| ($pat =~ m%/([^/]*)/([^/]*)/g% )
|| ($pat =~ /s%([^%]*)%([^%]*)%;t/ )
|| ($pat =~ m%/([^/]*)/([^/]*)/;t% )
) {
# form : s%bla%blubb%g
# or s%bla%blubb%;t t (newer autoconf)
push @comp_subs, make_closure($1, $2);
} elsif ( ($pat =~ /%([^%]*)%d/ )
|| ($pat =~ m%/([^/]*)/d% )
) {
push @comp_subs, make_closure($1, "");
} else {
die "Uhh. Malformed pattern in $ac_cs_root.subs ($pat)"
unless ( $pat =~ /^\s*$/ ); # ignore white lines
}
}
} else {
foreach my $pat (@subs) {
if ( ($pat =~ /s%([^%]*)%([^%]*)%g/ )
|| ($pat =~ m%/([^/]*)/([^/]*)/g% )
|| ($pat =~ /s%([^%]*)%([^%]*)%;t/ )
|| ($pat =~ m%/([^/]*)/([^/]*)/;t% )
) {
# form : s%bla%blubb%g
# or s%bla%blubb%;t t (newer autoconf)
push @comp_match, eval "qr/\Q$1\E/"; # compile match pattern
push @comp_subs, $2;
} elsif ( ($pat =~ /%([^%]*)%d/ )
|| ($pat =~ m%/([^/]*)/d% )
) {
push @comp_match, eval "qr/\Q$1\E/";
push @comp_subs, "";
} else {
die "Uhh. Malformed pattern in $ac_cs_root.subs ($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_cs_root.sacfiles") || die "can't open $ac_cs_root.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 "$ac_dir") { mkdir "$ac_dir", 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%.*/%%;
my $configure_input="Generated automatically from $fname by config.pl.";
if ($ac_file =~ /.*[Mm]akefile.*/) {
$ac_comsub="# ".$configure_input."\n"; # for the first line in $ac_file
}
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, $ac_comsub);
}
sub patch_file {
my ($outf, $infiles, $firstline) = @_;
my $filedata;
my @infiles=split(' ', $infiles);
my $i=0;
if ($firstline) {
$filedata = $firstline;
}
foreach my $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) = @_;
$pat =~ s/\@/\\@/g; # @bla@ -> \@bla\@
$pat =~ s/\$/\\\$/g; # $bla -> \$bla
$sub =~ s/\@/\\@/g;
$sub =~ s/\$/\\\$/g;
my $ret = eval "return sub { my \$ref=shift; \$\$ref =~ s%$pat%$sub%g; }";
if ($@) {
print "can't create CODE: $@\n";
}
return $ret;
}
|
