1#!/usr/bin/perl -w
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 File::Basename;
31
32my $ac_aux_dir = dirname($0);
33my ($flag);
34local $ac_version = 0;
35my $vpath_seen = 0;
36$flag = 0;
37
38while (<>) {
39# usage of $flag: 0 -- we have seen nothing yet
40#   1 -- we are in (1)
41#   2 -- we have ended (1)
42#   3 -- we are in (2)
43#   4 -- we ended (2)
44
45    if ($flag == 4) {
46        print;
47    } elsif ($flag == 0) {
48# 1. begins with (including): "ac_max_sed_\S+\s*=\s*[0-9]+..."
49#    ends with (excluding) "CONFIG_FILE=..."
50#    in later autoconf (2.14.1) there is no CONFIG_FILES= line,
51#    but instead the (2) directly follow (1)
52        if (/^\s*ac_max_sed_([a-z]+).*=\s*([0-9]+)/ ) {
53	    $flag = 1;
54	    if ($1 eq 'lines') {
55                # lets hope its different with 2141,
56                # wasn't able to verify that
57              if ($2 eq '48') {
58                $ac_version = 250;
59              }
60              else {
61	        $ac_version = 2141;
62              }
63	    } elsif ($1 eq 'cmds') {
64	        $ac_version = 213;
65	    }
66	    # hmm, we don't know the autoconf version, but we try anyway
67	} else {
68	    print;
69	}
70    } elsif ($flag == 1) {
71        if (/^\s*CONFIG_FILES=/ && ($ac_version != 250)) {
72	     print;
73	     $flag = 2;
74	} elsif (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
75	     $flag = 3;
76	}
77    } elsif ($flag == 2) {
78# 2. begins with: "for ac_file in.*CONFIG_FILES"  (the next 'for' after (1))
79#    end with: "rm -f conftest.s\*"
80# on autoconf 250, it ends with '# CONFIG_HEADER section'
81	if (/^\s*for\s+ac_file\s+in\s+.*CONFIG_FILES/ ) {
82	    $flag = 3;
83	} else {
84	    print;
85	}
86    } elsif ($flag == 3) {
87        if (/^\s*rm\s+-f\s+conftest/ ) {
88	    $flag = 4;
89	    &insert_main_loop();
90	} elsif (/^\s*rm\s+-f\s+.*ac_cs_root/ ) {
91	    $flag = 4;
92	    &insert_main_loop();
93	    #die "hhhhhhh";
94	    if ($ac_version != 2141) {
95	        print STDERR "hmm, don't know autoconf version\n";
96	    }
97        } elsif (/^\#\s*CONFIG_HEADER section.*/) {
98          $flag = 4;
99          &insert_main_loop();
100          if($ac_version != 250) {
101            print STDERR "hmm, something went wrong :-(\n";
102          }
103	} elsif (/VPATH/ ) {
104	    $vpath_seen = 1;
105	}
106    }
107}
108
109die "wrong input (flag != 4)" unless $flag == 4;
110print STDERR "hmm, don't know autoconf version\n" unless $ac_version;
111
112sub insert_main_loop {
113
114  if ($ac_version == 250) {
115    &insert_main_loop_250();
116  }
117  else {
118    &insert_main_loop_213();
119  }
120}
121
122sub insert_main_loop_250 {
123
124  print <<EOF;
125  #echo Doing the fast build of Makefiles -- autoconf $ac_version
126EOF
127    if ($vpath_seen) {
128        print <<EOF;
129        # VPATH subst was seen in original config.status main loop
130  echo '/^[ 	]*VPATH[ 	]*=[^:]*\$/d' >>\$tmp/subs.sed
131EOF
132      }
133  print <<EOF;
134  rm -f \$tmp/subs.files
135  for ac_file in .. \$CONFIG_FILES ; do
136      if test "x\$ac_file" != x..; then
137          echo \$ac_file >> \$tmp/subs.files
138      fi
139  done
140  if test -f \$tmp/subs.files ; then
141      perl $ac_aux_dir/config.pl "\$tmp/subs.sed" "\$tmp/subs.files" "\$srcdir" "\$INSTALL"
142  fi
143  rm -f \$tmp/subs.files
144
145fi
146EOF
147  return;
148}
149
150sub insert_main_loop_213 {
151    print <<EOF;
152#echo Doing the fast build of Makefiles -- autoconf $ac_version
153if test "x\$ac_cs_root" = "x" ; then
154    ac_cs_root=conftest
155fi
156EOF
157    if ($vpath_seen) {
158      print <<EOF;
159# VPATH subst was seen in original config.status main loop
160echo '/^[ 	]*VPATH[ 	]*=[^:]*\$/d' >> \$ac_cs_root.subs
161EOF
162    }
163    print <<EOF;
164rm -f \$ac_cs_root.sacfiles
165for ac_file in .. \$CONFIG_FILES ; do
166    if test "x\$ac_file" != x..; then
167        echo \$ac_file >> \$ac_cs_root.sacfiles
168    fi
169done
170if test -f \$ac_cs_root.sacfiles ; then
171    perl $ac_aux_dir/config.pl "\$ac_cs_root.subs" "\$ac_cs_root.sacfiles" "\$ac_given_srcdir" "\$ac_given_INSTALL"
172fi
173rm -f \$ac_cs_root.s*
174
175EOF
176    return;
177}
178