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#!/usr/bin/perl
# This script reorders config_h.SH after metaconfig
# Changing metaconfig is too complicated
#
# This script is run just after metaconfig, and it
# is run ONLY ONCE. Not to be used afterwards
#
# Copyright (C) 2005-2012 by H.Merijn Brand (m)'12 [22-09-2012]
#
# You may distribute under the terms of either the GNU General Public
# License or the Artistic License, as specified in the README file.
use strict;
use warnings;
my ($cSH, $ch, @ch, %ch) = ("config_h.SH");
open $ch, "<$cSH" or die "Cannot open $cSH: $!\n";
{ local $/ = "\n\n";
@ch = <$ch>;
close $ch;
}
sub ch_index ()
{
%ch = ();
foreach my $ch (0 .. $#ch) {
while ($ch[$ch] =~ m{^/\* ([A-Z]\w+)}gm) {
$ch{$1} = $ch;
}
}
} # ch_index
my %dep = (
# This symbol must be defined BEFORE ...
BYTEORDER => [ qw( UVSIZE ) ],
LONGSIZE => [ qw( BYTEORDER ) ],
MULTIARCH => [ qw( BYTEORDER MEM_ALIGNBYTES ) ],
HAS_QUAD => [ qw( I64TYPE ) ],
HAS_GETGROUPS => [ qw( Groups_t ) ],
HAS_SETGROUPS => [ qw( Groups_t ) ],
);
my $changed;
do {
$changed = 0;
foreach my $sym (keys %dep) {
ch_index;
foreach my $dep (@{$dep{$sym}}) {
print STDERR "Check if $sym\t($ch{$sym}) precedes $dep\t($ch{$dep})\n";
$ch{$sym} < $ch{$dep} and next;
my $ch = splice @ch, $ch{$sym}, 1;
splice @ch, $ch{$dep}, 0, $ch;
$changed++;
ch_index;
}
}
} while ($changed);
# 30327
for (grep m{echo .Extracting \$CONFIG_H} => @ch) {
my $case = join "\n",
qq{case "\$CONFIG_H" in},
qq{already-done) echo "Not re-extracting config.h" ;;},
qq{*)}, "";
s{^(?=echo .Extracting)}{$case}m;
}
push @ch, ";;\nesac\n";
open $ch, "> $cSH" or die "Cannot write $cSH: $!\n";
print $ch <<EOW;
#!/bin/sh
#
# THIS IS A GENERATED FILE
# DO NOT HAND-EDIT
#
# See Porting/config_h.pl
EOW
print $ch @ch;
close $ch;
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