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#!/usr/bin/perl -w
# this script patches a config.status file, to use our own perl script
# in the main loop
# we do it this way to circumvent hacking (and thereby including)
# autoconf function (which are GPL) into our LGPL acinclude.m4.in
# written by Michael Matz <matz@ifh.de>
# we have to change two places
# 1. the splitting of the substitutions into chunks of 90 (or even 48 in
# later autoconf's
# 2. the big main loop which patches all Makefile.in's
use File::Basename;
my $ac_aux_dir = dirname($0);
my ($flag);
my $ac_version = 0;
my $vpath_seen = 0;
$flag = 0;
while (<>) {
# usage of $flag: 0 -- we have seen nothing yet
# 1 -- we are in (1)
# 2 -- we have ended (1)
# 3 -- we are in (2)
# 4 -- we ended (2)
if ($flag == 4) {
print;
} elsif ($flag == 0) {
# 1. begins with (including): "ac_max_sed_\S+\s*=\s*[0-9]+..."
# ends with (excluding) "CONFIG_FILE=..."
# in later autoconf (2.14.1) there is no CONFIG_FILES= line,
# but instead the (2) directly follow (1)
if (/^\s*ac_max_sed_([a-z]+).*=\s*([0-9]+)/ ) {
$flag = 1;
if ($1 eq 'lines') {
# lets hope its different with 2141,
# wasn't able to verify that
if ($2 eq '48') {
$ac_version = 250;
}
else {
$ac_version = 2141;
}
} elsif ($1 eq 'cmds') {
$ac_version = 213;
}
# hmm, we don't know the autoconf version, but we try anyway
} else {
print;
}
} elsif ($flag == 1) {
if (/^\s*CONFIG_FILES=/ && ($ac_version != 250)) {
print;
$flag = 2;
} elsif (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
$flag = 3;
}
} elsif ($flag == 2) {
# 2. begins with: "for ac_file in.*CONFIG_FILES" (the next 'for' after (1))
# end with: "rm -f conftest.s\*"
# on autoconf 250, it ends with '# CONFIG_HEADER section'
if (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
$flag = 3;
} else {
print;
}
} elsif ($flag == 3) {
if (/^\s*rm\s+-f\s+conftest/ ) {
$flag = 4;
insert_main_loop();
} elsif (/^\s*rm\s+-f\s+.*ac_cs_root/ ) {
$flag = 4;
insert_main_loop();
#die "hhhhhhh";
if ($ac_version != 2141) {
print STDERR "hmm, don't know autoconf version\n";
}
} elsif (/^\#\s*CONFIG_HEADER section.*/) {
$flag = 4;
insert_main_loop();
if($ac_version != 250) {
print STDERR "hmm, something went wrong :-(\n";
}
} elsif (/VPATH/ ) {
$vpath_seen = 1;
}
}
}
die "wrong input (flag != 4)" unless $flag == 4;
print STDERR "hmm, don't know autoconf version\n" unless $ac_version;
die "autoconf 2.50 is currently not supported" if $ac_version == 250;
sub insert_main_loop {
print <<EOF;
#echo Doing the fast build of Makefiles -- autoconf $ac_version
if test "x\$ac_cs_root" = "x" ; then
ac_cs_root=conftest
fi
EOF
if ($vpath_seen) {
print <<EOF;
# VPATH subst was seen in original config.status main loop
echo '/^[ ]*VPATH[ ]*=[^:]*\$/d' >> \$ac_cs_root.subs
EOF
}
print <<EOF;
rm -f \$ac_cs_root.sacfiles
for ac_file in .. \$CONFIG_FILES ; do
if test "x\$ac_file" != x..; then
echo \$ac_file >> \$ac_cs_root.sacfiles
fi
done
if test -f \$ac_cs_root.sacfiles ; then
perl $ac_aux_dir/config.pl "\$ac_cs_root" "\$ac_given_srcdir" "\$ac_given_INSTALL"
fi
rm -f \$ac_cs_root.s*
EOF
return;
}
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