| 1 | #! @PERL@
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| 2 | # autoscan - Create configure.scan (a preliminary configure.in) for a package.
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| 3 | # Copyright (C) 1994 Free Software Foundation, Inc.
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| 4 |
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| 5 | # This program is free software; you can redistribute it and/or modify
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| 6 | # it under the terms of the GNU General Public License as published by
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| 7 | # the Free Software Foundation; either version 2, or (at your option)
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| 8 | # any later version.
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| 9 |
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| 10 | # This program is distributed in the hope that it will be useful,
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| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | # GNU General Public License for more details.
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| 14 |
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| 15 | # You should have received a copy of the GNU General Public License
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| 16 | # along with this program; if not, write to the Free Software
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| 17 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 18 | # 02111-1307, USA.
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| 19 |
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| 20 | # Written by David MacKenzie <djm@gnu.ai.mit.edu>.
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| 21 |
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| 22 | require "find.pl";
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| 23 |
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| 24 | $datadir = $ENV{"AC_MACRODIR"} || "@datadir@";
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| 25 | $verbose = 0;
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| 26 | # Reference these variables to pacify perl -w.
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| 27 | undef %identifiers_macros;
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| 28 | undef %makevars_macros;
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| 29 | undef %programs_macros;
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| 30 |
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| 31 | &parse_args;
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| 32 | &init_tables;
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| 33 | &find('.');
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| 34 | &scan_files;
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| 35 | &output;
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| 36 |
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| 37 | exit 0;
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| 38 |
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| 39 | # Process any command line arguments.
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| 40 | sub parse_args
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| 41 | {
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| 42 | local ($usage) =
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| 43 | "Usage: autoscan [--macrodir=dir] [--help] [--verbose] [--version] [srcdir]\n";
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| 44 |
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| 45 | foreach $_ (@ARGV) {
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| 46 | if (/^--m[a-z]*=(.*)/) {
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| 47 | $datadir = $1;
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| 48 | } elsif (/^--h/) {
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| 49 | print "$usage";
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| 50 | exit 0;
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| 51 | } elsif (/^--verb/) {
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| 52 | $verbose = 1;
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| 53 | } elsif (/^--vers/) {
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| 54 | &version;
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| 55 | } elsif (/^[^-]/) {
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| 56 | die "$usage" if defined($srcdir);
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| 57 | # Top level directory of the package being autoscanned.
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| 58 | $srcdir = $_;
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| 59 | } else {
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| 60 | die "$usage";
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | $srcdir="." if !defined($srcdir);
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| 65 |
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| 66 | print "srcdir=$srcdir\n" if $verbose;
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| 67 | chdir $srcdir || die "$0: cannot cd to $srcdir: $!\n";
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| 68 |
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| 69 | open(CONF, ">configure.scan") ||
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| 70 | die "$0: cannot create configure.scan: $!\n";
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| 71 | }
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| 72 |
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| 73 | # Print the version number and exit.
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| 74 | sub version
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| 75 | {
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| 76 | open(ACG, "<$datadir/acgeneral.m4") ||
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| 77 | die "$0: cannot open $datadir/acgeneral.m4: $!\n";
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| 78 | while (<ACG>) {
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| 79 | if (/define.AC_ACVERSION.\s*([0-9.]+)/) {
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| 80 | print "Autoconf version $1\n";
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| 81 | exit 0;
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| 82 | }
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| 83 | }
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| 84 | die "Autoconf version unknown\n";
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| 85 | }
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| 86 |
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| 87 | # Put values in the tables of what to do with each token.
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| 88 | sub init_tables
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| 89 | {
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| 90 | local($kind, $word, $macro);
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| 91 |
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| 92 | # Initialize a table of C keywords (to ignore).
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| 93 | # Taken from K&R 1st edition p. 180.
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| 94 | # ANSI C, GNU C, and C++ keywords can introduce portability problems,
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| 95 | # so don't ignore them.
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| 96 | foreach $word ('int', 'char', 'float', 'double', 'struct', 'union',
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| 97 | 'long', 'short', 'unsigned', 'auto', 'extern', 'register',
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| 98 | 'typedef', 'static', 'goto', 'return', 'sizeof', 'break',
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| 99 | 'continue', 'if', 'else', 'for', 'do', 'while', 'switch',
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| 100 | 'case', 'default') {
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| 101 | $c_keywords{$word} = 0;
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| 102 | }
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| 103 |
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| 104 | # The data file format supports only one line of macros per function.
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| 105 | # If more than that is required for a common portability problem,
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| 106 | # a new Autoconf macro should probably be written for that case,
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| 107 | # instead of duplicating the code in lots of configure.in files.
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| 108 |
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| 109 | foreach $kind ('functions', 'headers', 'identifiers', 'programs',
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| 110 | 'makevars') {
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| 111 | open(TABLE, "<$datadir/ac$kind") ||
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| 112 | die "$0: cannot open $datadir/ac$kind: $!\n";
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| 113 | while (<TABLE>) {
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| 114 | next if /^\s*$/ || /^\s*#/; # Ignore blank lines and comments.
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| 115 | ($word, $macro) = split;
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| 116 | eval "\$$kind" . "_macros{\$word} = \$macro";
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| 117 | }
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| 118 | close(TABLE);
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | # Collect names of various kinds of files in the package.
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| 123 | # Called by &find on each file.
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| 124 | sub wanted
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| 125 | {
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| 126 | if (/^.*\.[chlymC]$/ || /^.*\.cc$/) {
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| 127 | $name =~ s?^\./??; push(@cfiles, $name);
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| 128 | }
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| 129 | elsif (/^[Mm]akefile$/ || /^[Mm]akefile\.in$/ || /^GNUmakefile$/) {
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| 130 | $name =~ s?^\./??; push(@makefiles, $name);
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| 131 | }
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| 132 | elsif (/^.*\.sh$/) {
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| 133 | $name =~ s?^\./??; push(@shfiles, $name);
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| 134 | }
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| 135 | }
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| 136 |
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| 137 | # Read through the files and collect lists of tokens in them
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| 138 | # that might create nonportabilities.
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| 139 | sub scan_files
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| 140 | {
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| 141 | $initfile = $cfiles[0]; # Pick one at random.
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| 142 |
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| 143 | if ($verbose) {
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| 144 | print "cfiles:", join(" ", @cfiles), "\n";
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| 145 | print "makefiles:", join(" ", @makefiles), "\n";
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| 146 | print "shfiles:", join(" ", @shfiles), "\n";
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| 147 | }
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| 148 |
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| 149 | foreach $file (@cfiles) {
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| 150 | &scan_c_file($file);
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| 151 | }
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| 152 |
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| 153 | foreach $file (@makefiles) {
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| 154 | &scan_makefile($file);
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| 155 | }
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| 156 |
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| 157 | foreach $file (@shfiles) {
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| 158 | &scan_sh_file($file);
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| 159 | }
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| 160 | }
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| 161 |
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| 162 | sub scan_c_file
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| 163 | {
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| 164 | local($file) = @_;
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| 165 | local($in_comment) = 0; # Nonzero if in a multiline comment.
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| 166 |
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| 167 | open(CFILE, "<$file") || die "$0: cannot open $file: $!\n";
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| 168 | while (<CFILE>) {
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| 169 | # Strip out comments, approximately.
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| 170 | # Ending on this line.
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| 171 | if ($in_comment && m,\*/,) {
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| 172 | s,.*\*/,,;
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| 173 | $in_comment = 0;
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| 174 | }
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| 175 | # All on one line.
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| 176 | s,/\*.*\*/,,g;
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| 177 | # Starting on this line.
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| 178 | if (m,/\*,) {
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| 179 | $in_comment = 1;
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| 180 | }
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| 181 | # Continuing on this line.
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| 182 | next if $in_comment;
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| 183 |
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| 184 | # Preprocessor directives.
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| 185 | if (/^\s*#\s*include\s*<([^>]*)>/) {
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| 186 | $headers{$1}++;
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| 187 | }
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| 188 | # Ignore other preprocessor directives.
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| 189 | next if /^\s*#/;
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| 190 |
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| 191 | # Remove string and character constants.
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| 192 | s,\"[^\"]*\",,g;
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| 193 | s,\'[^\']*\',,g;
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| 194 |
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| 195 | # Tokens in the code.
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| 196 | # Maybe we should ignore function definitions (in column 0)?
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| 197 | while (s/\W([a-zA-Z_]\w*)\s*\(/ /) {
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| 198 | $functions{$1}++ if !defined($c_keywords{$1});
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| 199 | }
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| 200 | while (s/\W([a-zA-Z_]\w*)\W/ /) {
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| 201 | $identifiers{$1}++ if !defined($c_keywords{$1});
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| 202 | }
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| 203 | }
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| 204 | close(CFILE);
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| 205 |
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| 206 | if ($verbose) {
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| 207 | local($word);
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| 208 |
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| 209 | print "\n$file functions:\n";
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| 210 | foreach $word (sort keys %functions) {
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| 211 | print "$word $functions{$word}\n";
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| 212 | }
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| 213 |
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| 214 | print "\n$file identifiers:\n";
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| 215 | foreach $word (sort keys %identifiers) {
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| 216 | print "$word $identifiers{$word}\n";
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| 217 | }
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| 218 |
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| 219 | print "\n$file headers:\n";
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| 220 | foreach $word (sort keys %headers) {
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| 221 | print "$word $headers{$word}\n";
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| 222 | }
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| 223 | }
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| 224 | }
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| 225 |
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| 226 | sub scan_makefile
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| 227 | {
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| 228 | local($file) = @_;
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| 229 |
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| 230 | open(MFILE, "<$file") || die "$0: cannot open $file: $!\n";
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| 231 | while (<MFILE>) {
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| 232 | # Strip out comments and variable references.
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| 233 | s/#.*//;
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| 234 | s/\$\([^\)]*\)//g;
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| 235 | s/\${[^\}]*}//g;
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| 236 | s/@[^@]*@//g;
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| 237 |
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| 238 | # Variable assignments.
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| 239 | while (s/\W([a-zA-Z_]\w*)\s*=/ /) {
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| 240 | $makevars{$1}++;
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| 241 | }
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| 242 | # Libraries.
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| 243 | while (s/\W-l([a-zA-Z_]\w*)\W/ /) {
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| 244 | $libraries{$1}++;
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| 245 | }
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| 246 | # Tokens in the code.
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| 247 | while (s/\W([a-zA-Z_]\w*)\W/ /) {
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| 248 | $programs{$1}++;
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| 249 | }
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| 250 | }
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| 251 | close(MFILE);
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| 252 |
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| 253 | if ($verbose) {
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| 254 | local($word);
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| 255 |
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| 256 | print "\n$file makevars:\n";
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| 257 | foreach $word (sort keys %makevars) {
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| 258 | print "$word $makevars{$word}\n";
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| 259 | }
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| 260 |
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| 261 | print "\n$file libraries:\n";
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| 262 | foreach $word (sort keys %libraries) {
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| 263 | print "$word $libraries{$word}\n";
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| 264 | }
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| 265 |
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| 266 | print "\n$file programs:\n";
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| 267 | foreach $word (sort keys %programs) {
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| 268 | print "$word $programs{$word}\n";
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| 269 | }
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| 270 | }
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| 271 | }
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| 272 |
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| 273 | sub scan_sh_file
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| 274 | {
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| 275 | local($file) = @_;
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| 276 |
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| 277 | open(MFILE, "<$file") || die "$0: cannot open $file: $!\n";
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| 278 | while (<MFILE>) {
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| 279 | # Strip out comments and variable references.
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| 280 | s/#.*//;
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| 281 | s/\${[^\}]*}//g;
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| 282 | s/@[^@]*@//g;
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| 283 |
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| 284 | # Tokens in the code.
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| 285 | while (s/\W([a-zA-Z_]\w*)\W/ /) {
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| 286 | $programs{$1}++;
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| 287 | }
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| 288 | }
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| 289 | close(MFILE);
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| 290 |
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| 291 | if ($verbose) {
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| 292 | local($word);
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| 293 |
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| 294 | print "\n$file programs:\n";
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| 295 | foreach $word (sort keys %programs) {
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| 296 | print "$word $programs{$word}\n";
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| 297 | }
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| 298 | }
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| 299 | }
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| 300 |
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| 301 | # Print a configure.in.
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| 302 | sub output
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| 303 | {
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| 304 | local (%unique_makefiles);
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| 305 |
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| 306 | print CONF "dnl Process this file with autoconf to produce a configure script.\n";
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| 307 | print CONF "AC_INIT($initfile)\n";
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| 308 |
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| 309 | &output_programs;
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| 310 | &output_headers;
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| 311 | &output_identifiers;
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| 312 | &output_functions;
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| 313 |
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| 314 | # Change DIR/Makefile.in to DIR/Makefile.
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| 315 | foreach $_ (@makefiles) {
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| 316 | s/\.in$//;
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| 317 | $unique_makefiles{$_}++;
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| 318 | }
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| 319 | print CONF "\nAC_OUTPUT(", join(" ", keys(%unique_makefiles)), ")\n";
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| 320 |
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| 321 | close CONF;
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| 322 | }
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| 323 |
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| 324 | # Print Autoconf macro $1 if it's not undef and hasn't been printed already.
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| 325 | sub print_unique
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| 326 | {
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| 327 | local($macro) = @_;
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| 328 |
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| 329 | if (defined($macro) && !defined($printed{$macro})) {
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| 330 | print CONF "$macro\n";
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| 331 | $printed{$macro} = 1;
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| 332 | }
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| 333 | }
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| 334 |
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| 335 | sub output_programs
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| 336 | {
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| 337 | local ($word);
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| 338 |
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| 339 | print CONF "\ndnl Checks for programs.\n";
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| 340 | foreach $word (sort keys %programs) {
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| 341 | &print_unique($programs_macros{$word});
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| 342 | }
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| 343 | foreach $word (sort keys %makevars) {
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| 344 | &print_unique($makevars_macros{$word});
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| 345 | }
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| 346 | print CONF "\ndnl Checks for libraries.\n";
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| 347 | foreach $word (sort keys %libraries) {
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| 348 | print CONF "dnl Replace `\main\' with a function in -l$word:\n";
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| 349 | print CONF "AC_CHECK_LIB($word, main)\n";
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| 350 | }
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| 351 | }
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| 352 |
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| 353 | sub output_headers
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| 354 | {
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| 355 | local ($word);
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| 356 |
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| 357 | print CONF "\ndnl Checks for header files.\n";
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| 358 | foreach $word (sort keys %headers) {
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| 359 | if (defined($headers_macros{$word}) &&
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| 360 | $headers_macros{$word} eq 'AC_CHECK_HEADERS') {
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| 361 | push(@have_headers, $word);
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| 362 | } else {
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| 363 | &print_unique($headers_macros{$word});
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| 364 | }
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| 365 | }
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| 366 | print CONF "AC_CHECK_HEADERS(" . join(' ', sort(@have_headers)) . ")\n"
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| 367 | if defined(@have_headers);
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| 368 | }
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| 369 |
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| 370 | sub output_identifiers
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| 371 | {
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| 372 | local ($word);
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| 373 |
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| 374 | print CONF "\ndnl Checks for typedefs, structures, and compiler characteristics.\n";
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| 375 | foreach $word (sort keys %identifiers) {
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| 376 | &print_unique($identifiers_macros{$word});
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| 377 | }
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| 378 | }
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| 379 |
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| 380 | sub output_functions
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| 381 | {
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| 382 | local ($word);
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| 383 |
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| 384 | print CONF "\ndnl Checks for library functions.\n";
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| 385 | foreach $word (sort keys %functions) {
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| 386 | if (defined($functions_macros{$word}) &&
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| 387 | $functions_macros{$word} eq 'AC_CHECK_FUNCS') {
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| 388 | push(@have_funcs, $word);
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| 389 | } else {
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| 390 | &print_unique($functions_macros{$word});
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| 391 | }
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| 392 | }
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| 393 | print CONF "AC_CHECK_FUNCS(" . join(' ', sort(@have_funcs)) . ")\n"
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| 394 | if defined(@have_funcs);
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| 395 | }
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