mirror of
git://git.sv.gnu.org/autoconf
synced 2024-12-09 02:10:22 +08:00
599 lines
14 KiB
Plaintext
599 lines
14 KiB
Plaintext
#! @PERL@ -w
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# autoscan - Create configure.scan (a preliminary configure.ac) for a package.
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# Copyright 1994, 1999, 2000 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., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, 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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use Getopt::Long;
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use strict;
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use vars qw($autoconf $datadir $initfile $me $name $verbose
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@cfiles @makefiles @shfiles
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%functions_macros %headers_macros %identifiers_macros
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%programs_macros %makevars_macros %needed_macros
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%c_keywords %programs %headers %identifiers %makevars
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%libraries %functions %printed);
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# Find the lib files and autoconf.
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&find_autoconf;
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($me = $0) =~ s,.*/,,;
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$verbose = 0;
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# Reference these variables to pacify perl -w.
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%identifiers_macros = ();
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%makevars_macros = ();
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%programs_macros = ();
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%needed_macros = ();
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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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if (-f 'configure.ac')
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{
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if (-f 'configure.in')
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{
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print STDERR "warning: `configure.ac' and `configure.in' both present.\n";
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print STDERR "warning: proceeding with `configure.ac'.\n";
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}
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&check_configure_ac ('configure.in');
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}
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elsif (-f 'configure.in')
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{
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&check_configure_ac ('configure.in');
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}
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exit 0;
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# find_autoconf
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# -------------
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# Find the lib files and autoconf.
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sub find_autoconf
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{
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my $dir;
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my $file;
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$datadir = $ENV{"AC_MACRODIR"} || "@datadir@";
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($dir = $0) =~ s,[^/]*$,,;
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$autoconf = '';
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# We test "$dir/autoconf" in case we are in the build tree, in which case
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# the names are not transformed yet.
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foreach $file ($ENV{"AUTOCONF"} || '',
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"$dir/@autoconf-name@",
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"$dir/autoconf",
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"@bindir@/@autoconf-name@")
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{
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if (-f $file)
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{
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$autoconf = $file;
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last;
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}
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}
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}
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# Display usage (--help).
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sub print_usage
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{
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print "Usage: $0 [OPTION] ... [SRCDIR]
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Examine source files in the directory tree rooted at SRCDIR, or the
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current directory if none is given. Search the source files for
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common portability problems and create a file `configure.scan' which
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is a preliminary `configure.ac' for that package.
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-h, --help print this help, then exit
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-V, --version print version number, then exit
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-v, --verbose verbosely report processing
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Library directories:
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-A, --autoconf-dir=ACDIR Autoconf's files location (rarely needed)
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-l, --localdir=DIR location of `aclocal.m4' and `acconfig.h'
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Report bugs to <bug-autoconf\@gnu.org>.\n";
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exit 0;
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}
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# Display version (--version).
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sub print_version
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{
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print "autoscan (@PACKAGE_NAME@) @VERSION@
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Written by David J. MacKenzie.
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Copyright 1994, 1999, 2000 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
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exit 0;
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}
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# Process any command line arguments.
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sub parse_args
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{
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my $srcdir;
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Getopt::Long::config ("bundling");
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Getopt::Long::GetOptions ("A|autoconf-dir|m|macrodir=s" => \$datadir,
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"h|help" => \&print_usage,
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"V|version" => \&print_version,
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"v|verbose" => \$verbose)
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or exit 1;
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die "$me: too many arguments
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Try `$me --help' for more information.\n"
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if (@ARGV > 1);
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($srcdir) = @ARGV;
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$srcdir = "."
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if !defined $srcdir;
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print "srcdir=$srcdir\n" if $verbose;
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chdir $srcdir || die "$me: cannot cd to $srcdir: $!\n";
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open (CONF, ">configure.scan") ||
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die "$me: cannot create configure.scan: $!\n";
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}
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# Put values in the tables of what to do with each token.
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sub init_tables
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{
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my ($kind, $word, $macro);
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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 $word ('int', 'char', 'float', 'double', 'struct', 'union',
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'long', 'short', 'unsigned', 'auto', 'extern', 'register',
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'typedef', 'static', 'goto', 'return', 'sizeof', 'break',
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'continue', 'if', 'else', 'for', 'do', 'while', 'switch',
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'case', 'default')
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{
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$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.ac files.
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foreach $kind ('functions', 'headers', 'identifiers', 'programs',
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'makevars')
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{
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open(TABLE, "<$datadir/ac$kind") ||
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die "$me: cannot open $datadir/ac$kind: $!\n";
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while (<TABLE>)
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{
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# Ignore blank lines and comments.
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next
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if /^\s*$/ || /^\s*\#/;
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unless (/^(\S+)\s+(\S.*)$/)
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{
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die "$me: cannot parse definition in $datadir/ac$kind:\n$_\n";
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}
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($word, $macro) = ($1, $2);
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eval "\$$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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# Strip a useless leading `./'.
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$name =~ s,^\./,,;
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if (/^.*\.[chlymC]$/ || /^.*\.cc$/)
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{
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push(@cfiles, $name);
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}
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elsif (/^[Mm]akefile$/ || /^GNUmakefile$/)
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{
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# Wanted only if there is no corresponding Makefile.in.
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# Using Find, $_ contains the current filename with the current
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# directory of the walk through.
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push(@makefiles, $name)
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if ! -f "$_.in";
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}
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elsif (/^[Mm]akefile\.in$/)
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{
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push(@makefiles, $name);
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}
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elsif (/^.*\.sh$/)
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{
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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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my $file;
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if (defined $cfiles[0])
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{
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$initfile = $cfiles[0]; # Pick one at random.
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}
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if ($verbose)
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{
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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 $file (@cfiles)
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{
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push (@{$programs{"cc"}}, $file);
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&scan_c_file($file);
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}
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foreach $file (@makefiles)
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{
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&scan_makefile($file);
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}
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foreach $file (@shfiles)
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{
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&scan_sh_file($file);
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}
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}
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# scan_c_file(FILE)
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# -----------------
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sub scan_c_file
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{
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my ($file) = @_;
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my ($in_comment) = 0; # Nonzero if in a multiline comment.
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open(CFILE, "<$file") || die "$me: cannot open $file: $!\n";
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while (<CFILE>)
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{
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# Strip out comments, approximately.
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# Ending on this line.
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if ($in_comment && m,\*/,)
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{
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s,.*\*/,,;
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$in_comment = 0;
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}
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# All on one line.
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s,/\*.*\*/,,g;
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# Starting on this line.
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if (m,/\*,)
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{
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$in_comment = 1;
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}
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# Continuing on this line.
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next if $in_comment;
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# Preprocessor directives.
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if (/^\s*\#\s*include\s*<([^>]*)>/)
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{
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push (@{$headers{$1}}, "$file:$.");
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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/\b([a-zA-Z_]\w*)\s*\(/ /)
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{
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push (@{$functions{$1}}, "$file:$.")
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if !defined $c_keywords{$1};
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}
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$identifiers{$1}}, "$file:$.")
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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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{
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my ($word);
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print "\n$file functions:\n";
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foreach $word (sort keys %functions)
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{
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print "$word: @{$functions{$word}}\n";
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}
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print "\n$file identifiers:\n";
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foreach $word (sort keys %identifiers)
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{
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print "$word: @{$identifiers{$word}}\n";
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}
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print "\n$file headers:\n";
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foreach $word (sort keys %headers)
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{
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print "$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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my ($file) = @_;
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open(MFILE, "<$file") || die "$me: cannot open $file: $!\n";
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while (<MFILE>)
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{
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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/\b([a-zA-Z_]\w*)\s*=/ /)
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{
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push (@{$makevars{$1}}, "$file:$.");
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}
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# Libraries.
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while (s/\B-l([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$libraries{$1}}, "$file:$.");
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}
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# Tokens in the code.
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$programs{$1}}, "$file:$.");
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}
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}
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close(MFILE);
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if ($verbose)
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{
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my ($word);
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print "\n$file makevars:\n";
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foreach $word (sort keys %makevars)
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{
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print "$word: @{$makevars{$word}}\n";
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}
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print "\n$file libraries:\n";
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foreach $word (sort keys %libraries)
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{
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print "$word: @{$libraries{$word}}\n";
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}
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print "\n$file programs:\n";
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foreach $word (sort keys %programs)
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{
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print "$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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my ($file) = @_;
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open(MFILE, "<$file") || die "$me: cannot open $file: $!\n";
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while (<MFILE>)
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{
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# Strip out comments and variable references.
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s/#.*//;
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s/\${[^\}]*}//g;
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s/@[^@]*@//g;
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# Tokens in the code.
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$programs{$1}}, "$file:$.");
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}
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}
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close(MFILE);
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if ($verbose)
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{
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my ($word);
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print "\n$file programs:\n";
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foreach $word (sort keys %programs)
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{
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print "$word: @{$programs{$word}}\n";
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}
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}
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}
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# Print a proto configure.ac.
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sub output
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{
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my %unique_makefiles;
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print CONF "# Process this file with autoconf to produce a configure script.\n";
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print CONF "AC_INIT\n";
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if (defined $initfile)
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{
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print CONF "AC_CONFIG_SRCDIR([$initfile])\n";
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}
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if (defined $cfiles[0])
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{
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print CONF "AC_CONFIG_HEADER([config.h])\n";
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}
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&output_programs;
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&output_libraries;
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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 $_ (@makefiles)
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{
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s/\.in$//;
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$unique_makefiles{$_}++;
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}
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print CONF "\nAC_CONFIG_FILES([",
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join("\n ", keys(%unique_makefiles)), "])\n";
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print CONF "AC_OUTPUT\n";
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close CONF;
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}
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# Print Autoconf macro $1 if it's not undef and hasn't been printed already.
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sub print_unique
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{
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my ($macro, @where) = @_;
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if (defined $macro && !defined $printed{$macro})
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{
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print CONF "$macro\n";
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$printed{$macro} = 1;
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# For the time being, just don't bother with macros with arguments.
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push (@{$needed_macros{$macro}}, @where)
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if ($macro !~ /[][]|^AC_CHECK_.*S/);
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}
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}
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sub output_programs
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{
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my $word;
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print CONF "\n# Checks for programs.\n";
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foreach $word (sort keys %programs)
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{
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&print_unique($programs_macros{$word}, @{$programs{$word}});
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}
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foreach $word (sort keys %makevars)
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{
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&print_unique($makevars_macros{$word}, @{$makevars{$word}});
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}
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}
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sub output_libraries
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{
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my ($word);
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print CONF "\n# Checks for libraries.\n";
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foreach $word (sort keys %libraries)
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{
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print CONF "# FIXME: Replace `main' with a function in `-l$word':\n";
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print CONF "AC_CHECK_LIB([$word], [main])\n";
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}
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}
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sub output_headers
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{
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my $word;
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my @have_headers;
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print CONF "\n# Checks for header files.\n";
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foreach $word (sort keys %headers)
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{
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if (defined $headers_macros{$word} &&
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$headers_macros{$word} eq 'AC_CHECK_HEADERS')
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{
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push(@have_headers, $word);
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}
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else
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{
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&print_unique($headers_macros{$word}, @{$headers{$word}});
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}
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}
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print CONF "AC_CHECK_HEADERS([" . join(' ', sort(@have_headers)) . "])\n"
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if @have_headers;
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}
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sub output_identifiers
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{
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my $word;
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my @have_types;
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print CONF "\n# Checks for typedefs, structures, and compiler characteristics.\n";
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foreach $word (sort keys %identifiers)
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{
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if (defined $identifiers_macros{$word} &&
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$identifiers_macros{$word} eq 'AC_CHECK_TYPES')
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{
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push (@have_types, $word);
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}
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else
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{
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&print_unique ($identifiers_macros{$word}, @{$identifiers{$word}});
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}
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}
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print CONF "AC_CHECK_TYPES([" . join(', ', sort(@have_types)) . "])\n"
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if @have_types;
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}
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sub output_functions
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{
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my $word;
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my @have_funcs;
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print CONF "\n# Checks for library functions.\n";
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foreach $word (sort keys %functions)
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{
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if (defined $functions_macros{$word} &&
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$functions_macros{$word} eq 'AC_CHECK_FUNCS')
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{
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push(@have_funcs, $word);
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}
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else
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{
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&print_unique ($functions_macros{$word}, @{$functions{$word}});
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}
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}
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print CONF "AC_CHECK_FUNCS([" . join(' ', sort(@have_funcs)) . "])\n"
|
|
if @have_funcs;
|
|
}
|
|
|
|
|
|
# Use autoconf to check if all the suggested macros are included
|
|
# in `configure.ac'
|
|
sub check_configure_ac
|
|
{
|
|
my ($configure_ac) = $@;
|
|
my ($trace_option) = '';
|
|
my ($word);
|
|
my ($macro);
|
|
|
|
foreach $macro (sort keys %needed_macros)
|
|
{
|
|
$trace_option .= " -t $macro";
|
|
}
|
|
|
|
open (TRACES, "$autoconf -A $datadir $trace_option $configure_ac|") ||
|
|
die "$me: cannot create read traces: $!\n";
|
|
|
|
while (<TRACES>)
|
|
{
|
|
my ($file, $line, $macro, $args) = split (/:/, $_, 4);
|
|
delete ($needed_macros{$macro});
|
|
}
|
|
|
|
close (TRACES) ||
|
|
die "$me: cannot close traces: $!\n";
|
|
|
|
foreach $macro (sort keys %needed_macros)
|
|
{
|
|
print STDERR "warning: missing $macro wanted by: @{$needed_macros{$macro}}\n";
|
|
}
|
|
}
|