mirror of
git://git.sv.gnu.org/autoconf
synced 2024-11-27 01:49:56 +08:00
390 lines
9.1 KiB
Perl
390 lines
9.1 KiB
Perl
#!@PERL@
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eval "exec @PERL@ -S $0 $*"
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if $running_under_some_shell;
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# this emulates #! processing on NIH machines.
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# (remove #! line above if indigestible)
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# autoscan - Create configure.scan (a preliminary configure.in) for a package.
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# Copyright (C) 1994 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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# Written by David MacKenzie <djm@gnu.ai.mit.edu>.
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require "find.pl";
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$datadir = "@datadir@";
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$verbose = 0;
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&parse_args;
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&init_tables;
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&find('.');
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&scan_files;
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&output;
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exit 0;
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# Process any command line arguments.
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sub parse_args
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{
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local ($usage) = "Usage: $0 [--help] [--verbose] [--version] [srcdir]\n";
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foreach $_ (@ARGV) {
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if (/^--h/) {
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print "$usage";
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exit 0;
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} elsif (/^--verb/) {
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$verbose = 1;
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} elsif (/^--vers/) {
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&version;
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} elsif (/^[^-]/) {
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die "$usage" if defined($srcdir);
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# Top level directory of the package being autoscanned.
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$srcdir = $_;
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} else {
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die "$usage";
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}
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}
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$srcdir="." if !defined($srcdir);
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print "srcdir=$srcdir\n" if $verbose;
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chdir $srcdir || die "$0: cannot cd to $srcdir: $!\n";
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open(CONF, ">configure.scan") ||
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die "$0: cannot create configure.scan: $!\n";
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}
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# Print the version number and exit.
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sub version
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{
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open(ACG, "<$datadir/acgeneral.m4") ||
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die "$0: cannot open $datadir/acgeneral.m4: $!\n";
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while (<ACG>) {
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if (/define.AC_ACVERSION.\s*([0-9.]+)/) {
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print "Autoconf version $1\n";
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exit 0;
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}
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}
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die "Autoconf version unknown\n";
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}
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# Put values in the tables of what to do with each token.
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sub init_tables
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{
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local($kind, $word, $macro, %files);
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# Initialize a table of C keywords (to ignore).
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# Taken from K&R 1st edition p. 180.
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# ANSI C, GNU C, and C++ keywords can introduce portability problems,
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# so don't ignore them.
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foreach $word ('int', 'char', 'float', 'double', 'struct', 'union',
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'long', 'short', 'unsigned', 'auto', 'extern', 'register',
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'typedef', 'static', 'goto', 'return', 'sizeof', 'break',
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'continue', 'if', 'else', 'for', 'do', 'while', 'switch',
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'case', 'default') {
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$c_keywords{$word} = 0;
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}
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# The data file format supports only one line of macros per function.
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# If more than that is required for a common portability problem,
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# a new Autoconf macro should probably be written for that case,
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# instead of duplicating the code in lots of configure.in files.
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foreach $kind ('functions', 'headers', 'identifiers', 'programs',
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'makevars') {
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open(TABLE, "<$datadir/ac$kind") ||
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die "$0: cannot open $datadir/ac$kind: $!\n";
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while (<TABLE>) {
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next if /^\s*$/ || /^\s*#/; # Ignore blank lines and comments.
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($word, $macro) = split;
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eval "\$$kind" . "_macros{\$word} = \$macro";
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}
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close(TABLE);
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}
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}
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# Collect names of various kinds of files in the package.
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# Called by &find on each file.
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sub wanted
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{
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if (/^.*\.[chlymC]$/ || /^.*\.cc$/) {
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$name =~ s?^\./??; push(@cfiles, $name);
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}
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elsif (/^[Mm]akefile$/ || /^[Mm]akefile\.in$/ || /^GNUmakefile$/) {
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$name =~ s?^\./??; push(@makefiles, $name);
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}
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elsif (/^.*\.sh$/) {
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$name =~ s?^\./??; push(@shfiles, $name);
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}
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}
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# Read through the files and collect lists of tokens in them
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# that might create nonportabilities.
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sub scan_files
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{
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$initfile = $cfiles[0]; # Pick one at random.
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if ($verbose) {
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print "cfiles:", join(" ", @cfiles), "\n";
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print "makefiles:", join(" ", @makefiles), "\n";
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print "shfiles:", join(" ", @shfiles), "\n";
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}
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foreach $file (@cfiles) {
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&scan_c_file($file);
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}
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foreach $file (@makefiles) {
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&scan_makefile($file);
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}
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foreach $file (@shfiles) {
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&scan_sh_file($file);
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}
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}
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sub scan_c_file
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{
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local($file) = @_;
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local($in_comment) = 0; # Nonzero if in a multiline comment.
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open(CFILE, "<$file") || die "$0: cannot open $file: $!\n";
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while (<CFILE>) {
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# Strip out comments, approximately.
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# Ending on this line.
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if ($in_comment && m,\*/,) {
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s,.*\*/,,;
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$in_comment = 0;
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}
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# All on one line.
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s,/\*.*\*/,,g;
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# Starting on this line.
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if (m,/\*,) {
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$in_comment = 1;
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}
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# Continuing on this line.
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next if $in_comment;
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# Preprocessor directives.
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if (/^\s*#\s*include\s*<([^>]*)>/) {
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$headers{$1}++;
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}
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# Ignore other preprocessor directives.
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next if /^\s*#/;
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# Remove string and character constants.
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s,\"[^\"]*\",,g;
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s,\'[^\']*\',,g;
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# Tokens in the code.
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# Maybe we should ignore function definitions (in column 0)?
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while (s/\W([a-zA-Z_]\w*)\s*\(/ /) {
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$functions{$1}++ if !defined($c_keywords{$1});
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}
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while (s/\W([a-zA-Z_]\w*)\W/ /) {
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$identifiers{$1}++ if !defined($c_keywords{$1});
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}
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}
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close(CFILE);
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if ($verbose) {
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local($word);
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print "\n$file functions:\n";
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foreach $word (sort keys %functions) {
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print "$word $functions{$word}\n";
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}
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print "\n$file identifiers:\n";
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foreach $word (sort keys %identifiers) {
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print "$word $identifiers{$word}\n";
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}
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print "\n$file headers:\n";
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foreach $word (sort keys %headers) {
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print "$word $headers{$word}\n";
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}
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}
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}
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sub scan_makefile
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{
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local($file) = @_;
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open(MFILE, "<$file") || die "$0: cannot open $file: $!\n";
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while (<MFILE>) {
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# Strip out comments and variable references.
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s/#.*//;
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s/\$\([^\)]*\)//g;
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s/\${[^\}]*}//g;
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s/@[^@]*@//g;
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# Variable assignments.
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while (s/\W([a-zA-Z_]\w*)\s*=/ /) {
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$makevars{$1}++;
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}
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# Libraries.
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while (s/\W-l([a-zA-Z_]\w*)\W/ /) {
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$libraries{$1}++;
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}
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# Tokens in the code.
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while (s/\W([a-zA-Z_]\w*)\W/ /) {
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$programs{$1}++;
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}
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}
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close(MFILE);
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if ($verbose) {
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local($word);
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print "\n$file makevars:\n";
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foreach $word (sort keys %makevars) {
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print "$word $makevars{$word}\n";
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}
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print "\n$file libraries:\n";
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foreach $word (sort keys %libraries) {
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print "$word $libraries{$word}\n";
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}
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print "\n$file programs:\n";
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foreach $word (sort keys %programs) {
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print "$word $programs{$word}\n";
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}
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}
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}
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sub scan_sh_file
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{
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local($file) = @_;
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open(MFILE, "<$file") || die "$0: cannot open $file: $!\n";
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while (<MFILE>) {
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# Strip out comments and variable references.
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s/#.*//;
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s/\${[^\}]*}//g;
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s/@[^@]*@//g;
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# Tokens in the code.
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while (s/\W([a-zA-Z_]\w*)\W/ /) {
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$programs{$1}++;
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}
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}
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close(MFILE);
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if ($verbose) {
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local($word);
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print "\n$file programs:\n";
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foreach $word (sort keys %programs) {
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print "$word $programs{$word}\n";
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}
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}
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}
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# Print a configure.in.
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sub output
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{
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local (%unique_makefiles);
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print CONF "dnl Process this file with autoconf to produce a configure script.\n";
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print CONF "AC_INIT($initfile)\n";
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&output_programs;
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&output_headers;
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&output_identifiers;
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&output_functions;
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# Change DIR/Makefile.in to DIR/Makefile.
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foreach $_ (@makefiles) {
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s/\.in$//;
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$unique_makefiles{$_}++;
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}
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print CONF "AC_OUTPUT(", join(" ", keys(%unique_makefiles)), ")\n";
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close CONF;
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}
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# Print Autoconf macro $1 if it's not undef and hasn't been printed already.
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sub print_unique
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{
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local($macro) = @_;
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if (defined($macro) && !defined($printed{$macro})) {
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print CONF "$macro\n";
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$printed{$macro} = 1;
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}
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}
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sub output_programs
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{
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local ($word);
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print CONF "dnl Checks for programs.\n";
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foreach $word (sort keys %programs) {
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&print_unique($programs_macros{$word});
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}
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foreach $word (sort keys %makevars) {
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&print_unique($makevars_macros{$word});
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}
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print CONF "dnl Checks for libraries.\n";
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foreach $word (sort keys %libraries) {
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print CONF "AC_HAVE_LIBRARY($word)\n";
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}
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}
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sub output_headers
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{
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local ($word);
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print CONF "dnl Checks for header files.\n";
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foreach $word (sort keys %headers) {
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if ($headers_macros{$word} eq 'AC_HAVE_HEADERS') {
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push(@have_headers, $word);
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} else {
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&print_unique($headers_macros{$word});
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}
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}
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print CONF "AC_HAVE_HEADERS(" . join(' ', sort(@have_headers)) . ")\n"
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if defined(@have_headers);
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}
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sub output_identifiers
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{
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local ($word);
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print CONF "dnl Checks for identifiers.\n";
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foreach $word (sort keys %identifiers) {
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&print_unique($identifiers_macros{$word});
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}
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}
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sub output_functions
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{
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local ($word);
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print CONF "dnl Checks for functions.\n";
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foreach $word (sort keys %functions) {
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if ($functions_macros{$word} eq 'AC_HAVE_FUNCS') {
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push(@have_funcs, $word);
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} else {
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&print_unique($functions_macros{$word});
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}
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}
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print CONF "AC_HAVE_FUNCS(" . join(' ', sort(@have_funcs)) . ")\n"
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if defined(@have_funcs);
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}
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