1#!/usr/bin/env perl
2
3# this script patches a config.status file, to use our own perl script
4# in the main loop
5# we do it this way to circumvent hacking (and thereby including)
6# autoconf function (which are GPL) into our LGPL acinclude.m4.in
7# written by Michael Matz <matz@kde.org>
8# adapted by Dirk Mueller <mueller@kde.org>
9#
10#   This file is free software; you can redistribute it and/or
11#   modify it under the terms of the GNU Library General Public
12#   License as published by the Free Software Foundation; either
13#   version 2 of the License, or (at your option) any later version.
14
15#   This library is distributed in the hope that it will be useful,
16#   but WITHOUT ANY WARRANTY; without even the implied warranty of
17#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18#   Library General Public License for more details.
19
20#   You should have received a copy of the GNU Library General Public License
21#   along with this library; see the file COPYING.LIB.  If not, write to
22#   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23#   Boston, MA 02111-1307, USA.
24
25# we have to change two places
26# 1. the splitting of the substitutions into chunks of 90 (or even 48 in
27#    later autoconf's
28# 2. the big main loop which patches all Makefile.in's
29
30use strict;
31use File::Basename;
32
33my $ac_aux_dir = dirname($0);
34my ($flag);
35my $ac_version = 0;
36my $vpath_seen = 0;
37$flag = 0;
38
39while (<>) {
40# usage of $flag: 0 -- we have seen nothing yet
41#   1 -- we are in (1)
42#   2 -- we have ended (1)
43#   3 -- we are in (2)
44#   4 -- we ended (2)
45
46    if ($flag == 4) {
47        print;
48    } elsif ($flag == 0) {
49# 1. begins with (including): "ac_max_sed_\S+\s*=\s*[0-9]+..."
50#    ends with (excluding) "CONFIG_FILE=..."
51#    in later autoconf (2.14.1) there is no CONFIG_FILES= line,
52#    but instead the (2) directly follow (1)
53        if (/^\s*ac_max_sed_([a-z]+).*=\s*([0-9]+)/ ) {
54	    $flag = 1;
55	    if ($1 eq 'lines') {
56                # lets hope its different with 2141,
57                # wasn't able to verify that
58              if ($2 eq '48') {
59                $ac_version = 250;
60              }
61              else {
62	        $ac_version = 2141;
63              }
64	    } elsif ($1 eq 'cmds') {
65	        $ac_version = 213;
66	    }
67	    # hmm, we don't know the autoconf version, but we try anyway
68	} else {
69	    print;
70	}
71    } elsif ($flag == 1) {
72        if (/^\s*CONFIG_FILES=/ && ($ac_version != 250)) {
73	     print;
74	     $flag = 2;
75	} elsif (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
76	     $flag = 3;
77	}
78    } elsif ($flag == 2) {
79# 2. begins with: "for ac_file in.*CONFIG_FILES"  (the next 'for' after (1))
80#    end with: "rm -f conftest.s\*"
81# on autoconf 250, it ends with '# CONFIG_HEADER section'
82#
83# gg: if a post-processing commands section is found first,
84#    stop there and insert a new loop to honour the case/esac.
85# (pattern: /^\s+#\sRun the commands associated with the file./)
86
87	if (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
88	    $flag = 3;
89	} else {
90	    print;
91	}
92    } elsif ($flag == 3) {
93        if (/^\s*rm\s+-f\s+conftest/ ) {
94	    $flag = 4;
95	    &insert_main_loop();
96	} elsif (/^\s*rm\s+-f\s+.*ac_cs_root/ ) {
97	    $flag = 4;
98	    &insert_main_loop();
99	    #die "hhhhhhh";
100	    if ($ac_version != 2141) {
101	        print STDERR "hmm, don't know autoconf version\n";
102	    }
103        } elsif (/^\#\s*CONFIG_(HEADER|COMMANDS) section.*|^\s+#\s(Run) the commands associated/) {
104          $flag = 4;
105          my $commands = defined $2;
106          &insert_main_loop();
107          $commands && insert_command_loop();
108          if($ac_version != 250) {
109            print STDERR "hmm, something went wrong :-(\n";
110          }
111	} elsif (/VPATH/ ) {
112	    $vpath_seen = 1;
113	}
114    }
115}
116
117die "wrong input (flag != 4)" unless $flag == 4;
118print STDERR "hmm, don't know autoconf version\n" unless $ac_version;
119
120sub insert_main_loop {
121
122  if ($ac_version == 250) {
123    &insert_main_loop_250();
124  }
125  else {
126    &insert_main_loop_213();
127  }
128}
129
130sub insert_main_loop_250 {
131
132  print <<EOF;
133  #echo Doing the fast build of Makefiles -- autoconf $ac_version
134EOF
135    if ($vpath_seen) {
136        print <<EOF;
137        # VPATH subst was seen in original config.status main loop
138  echo '/^[ 	]*VPATH[ 	]*=[^:]*\$/d' >>\$tmp/subs.sed
139EOF
140      }
141  print <<EOF;
142  rm -f \$tmp/subs.files
143  for ac_file in .. \$CONFIG_FILES ; do
144      if test "x\$ac_file" != x..; then
145          echo \$ac_file >> \$tmp/subs.files
146      fi
147  done
148  if test -f \$tmp/subs.files ; then
149      perl $ac_aux_dir/config.pl "\$tmp/subs.sed" "\$tmp/subs.files" "\$srcdir" "\$INSTALL"
150  fi
151  rm -f \$tmp/subs.files
152
153fi
154EOF
155  return;
156}
157
158sub insert_main_loop_213 {
159    print <<EOF;
160#echo Doing the fast build of Makefiles -- autoconf $ac_version
161if test "x\$ac_cs_root" = "x" ; then
162    ac_cs_root=conftest
163fi
164EOF
165    if ($vpath_seen) {
166      print <<EOF;
167# VPATH subst was seen in original config.status main loop
168echo '/^[ 	]*VPATH[ 	]*=[^:]*\$/d' >> \$ac_cs_root.subs
169EOF
170    }
171    print <<EOF;
172rm -f \$ac_cs_root.sacfiles
173for ac_file in .. \$CONFIG_FILES ; do
174    if test "x\$ac_file" != x..; then
175        echo \$ac_file >> \$ac_cs_root.sacfiles
176    fi
177done
178if test -f \$ac_cs_root.sacfiles ; then
179    perl $ac_aux_dir/config.pl "\$ac_cs_root.subs" "\$ac_cs_root.sacfiles" "\$ac_given_srcdir" "\$ac_given_INSTALL"
180fi
181rm -f \$ac_cs_root.s*
182
183EOF
184    return;
185}
186
187sub insert_command_loop {
188    print <<EOF;
189  for ac_file in .. \$CONFIG_FILES ; do
190EOF
191}
192