mirror of
git://git.sv.gnu.org/autoconf
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657 lines
15 KiB
Plaintext
657 lines
15 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, 2001 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 $verbose
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@cfiles @makefiles @shfiles
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%functions_macros %headers_macros %identifiers_macros
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%programs_macros %makevars_macros %needed_macros
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%c_keywords %programs %headers %identifiers %makevars
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%libraries %functions %printed);
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($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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my @kinds = qw (functions headers identifiers programs makevars);
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# For each kind, the default macro.
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my %generic_macro =
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(
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'functions' => 'AC_CHECK_FUNCS',
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'headers' => 'AC_CHECK_HEADERS',
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'identifiers' => 'AC_CHECK_TYPES',
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'programs' => 'AC_CHECK_PROGS'
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);
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my $configure_scan = 'configure.scan';
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# Exit nonzero whenever closing STDOUT fails.
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sub END
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{
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use POSIX qw (_exit);
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# This is required if the code might send any output to stdout
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# E.g., even --version or --help. So it's best to do it unconditionally.
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close STDOUT
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or (warn "$me: closing standard output: $!\n"), _exit (1);
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}
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# find_autoconf
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# -------------
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# Find the lib files and autoconf.
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sub find_autoconf
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{
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$datadir = $ENV{"AC_MACRODIR"} || "@datadir@";
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(my $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 my $file ($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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# print_usage ()
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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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# print_version ()
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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, 2001 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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# parse_args ()
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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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}
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# init_tables ()
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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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# 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 my $word (qw (int char float double struct union long short
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unsigned auto extern register typedef static
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goto return sizeof break continue if else for
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do while switch case default))
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{
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$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 my $kind (@kinds)
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{
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my $file = "$datadir/ac$kind";
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open TABLE, $file or
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die "$me: cannot open $file: $!\n";
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while (<TABLE>)
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{
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# Ignore blank lines and comments.
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next
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if /^\s*$/ || /^\s*\#/;
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unless (/^(\S+)\s+(\S.*)$/ || /^(\S+)\s*$/)
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{
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die "$me: cannot parse definition in $file:\n$_\n";
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}
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my $word = $1;
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my $macro = $2 || $generic_macro{$kind};
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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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# wanted ()
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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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# scan_files ()
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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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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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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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foreach my $class (qw (functions identifiers headers
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makevars libraries programs))
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{
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print "\n$class:\n";
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my $h = eval "\\\%$class";
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foreach my $word (sort keys %$h)
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{
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print "$word: @{$h->{$word}}\n";
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}
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}
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}
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}
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# scan_c_file(FILE)
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# -----------------
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sub scan_c_file ($)
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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{$1};
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}
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}
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close(CFILE);
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}
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# scan_makefile(MAKEFILE)
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# -----------------------
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sub scan_makefile ($)
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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:$.");
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}
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}
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close(MFILE);
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}
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# scan_sh_file(SHELL-SCRIPT)
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# --------------------------
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sub scan_sh_file ($)
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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:$.");
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}
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}
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close(MFILE);
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}
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# print_unique ($MACRO, @WHERE)
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# -----------------------------
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# $MACRO is wanted from $WHERE, hence (i) print $MACRO in $configure_scan
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# if it exists and hasn't been printed already, (ii), remember it's needed.
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sub print_unique ($@)
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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{$macro} = 1;
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push (@{$needed_macros{$macro}}, @where);
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}
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}
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# output_programs ()
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# ------------------
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sub output_programs ()
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{
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print CONF "\n# Checks for programs.\n";
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foreach my $word (sort keys %programs)
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{
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print_unique ($programs_macros{$word}, @{$programs{$word}});
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}
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foreach my $word (sort keys %makevars)
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{
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print_unique ($makevars_macros{$word}, @{$makevars{$word}});
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}
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}
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# output_libraries ()
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# -------------------
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sub output_libraries ()
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{
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print CONF "\n# Checks for libraries.\n";
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foreach my $word (sort keys %libraries)
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{
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print CONF "# FIXME: Replace `main' with a function in `-l$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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# output_headers ()
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# -----------------
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sub output_headers ()
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{
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my @have_headers;
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print CONF "\n# Checks for header files.\n";
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foreach my $word (sort keys %headers)
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{
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if (defined $headers_macros{$word})
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{
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if ($headers_macros{$word} eq 'AC_CHECK_HEADERS')
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{
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push (@have_headers, $word);
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push (@{$needed_macros{"AC_CHECK_HEADERS([$word])"}},
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@{$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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}
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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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# output_identifiers ()
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# ---------------------
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sub output_identifiers ()
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{
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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 my $word (sort keys %identifiers)
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{
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if (defined $identifiers_macros{$word})
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{
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if ($identifiers_macros{$word} eq 'AC_CHECK_TYPES')
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{
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push (@have_types, $word);
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push (@{$needed_macros{"AC_CHECK_TYPES([$word])"}},
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@{$identifiers{$word}});
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}
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else
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{
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print_unique ($identifiers_macros{$word},
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@{$identifiers{$word}});
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}
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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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# output_functions ()
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# -------------------
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sub output_functions ()
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{
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my @have_funcs;
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print CONF "\n# Checks for library functions.\n";
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foreach my $word (sort keys %functions)
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{
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if (defined $functions_macros{$word})
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{
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if ($functions_macros{$word} eq 'AC_CHECK_FUNCS')
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{
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push (@have_funcs, $word);
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push (@{$needed_macros{"AC_CHECK_FUNCS([$word])"}},
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@{$functions{$word}});
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}
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else
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{
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print_unique ($functions_macros{$word},
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@{$functions{$word}});
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}
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}
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}
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print CONF "AC_CHECK_FUNCS([" . join(' ', sort(@have_funcs)) . "])\n"
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if @have_funcs;
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}
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# output (CONFIGURE_SCAN)
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# -----------------------
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# Print a proto configure.ac.
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sub output ($)
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{
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my $configure_scan = shift;
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my %unique_makefiles;
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open (CONF, ">$configure_scan") ||
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die "$me: cannot create $configure_scan: $!\n";
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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 my $m (@makefiles)
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{
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$m =~ s/\.in$//;
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$unique_makefiles{$m}++;
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}
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print CONF "\nAC_CONFIG_FILES([",
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join ("\n ", keys(%unique_makefiles)), "])\n";
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|
print CONF "AC_OUTPUT\n";
|
|
|
|
close CONF ||
|
|
die "$me: closing $configure_scan: $!\n";
|
|
}
|
|
|
|
|
|
# check_configure_ac (CONFIGURE_AC)
|
|
# ---------------------------------
|
|
# Use autoconf to check if all the suggested macros are included
|
|
# in CONFIGURE_AC.
|
|
sub check_configure_ac ($)
|
|
{
|
|
my ($configure_ac) = $@;
|
|
my ($trace_option) = '';
|
|
|
|
foreach my $macro (sort keys %needed_macros)
|
|
{
|
|
$macro =~ s/\(.*//;
|
|
$trace_option .= " -t $macro";
|
|
}
|
|
|
|
open (TRACES, "$autoconf -A $datadir $trace_option $configure_ac|") ||
|
|
die "$me: cannot create read traces: $!\n";
|
|
|
|
while (<TRACES>)
|
|
{
|
|
chomp;
|
|
my ($file, $line, $macro, @args) = split (/:/, $_);
|
|
if ($macro =~ /^AC_CHECK_(HEADER|FUNC|TYPE|MEMBER)S$/)
|
|
{
|
|
# To be rigorous, we should distinguish between space and comma
|
|
# separated macros. But there is no point.
|
|
foreach my $word (split (/\s|,/, $args[0]))
|
|
{
|
|
# AC_CHECK_MEMBERS wants `struct' or `union'.
|
|
if ($macro eq "AC_CHECK_MEMBERS"
|
|
&& $word =~ /^stat.st_/)
|
|
{
|
|
$word = "struct " . $word;
|
|
}
|
|
delete ($needed_macros{"$macro([$word])"});
|
|
}
|
|
}
|
|
else
|
|
{
|
|
delete ($needed_macros{$macro});
|
|
}
|
|
}
|
|
|
|
close (TRACES) ||
|
|
die "$me: cannot close traces: $!\n";
|
|
|
|
foreach my $macro (sort keys %needed_macros)
|
|
{
|
|
warn "$me: warning: missing $macro wanted by: \n";
|
|
foreach my $need (@{$needed_macros{$macro}})
|
|
{
|
|
warn "\t$need\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
## -------------- ##
|
|
## Main program. ##
|
|
## -------------- ##
|
|
|
|
# Find the lib files and autoconf.
|
|
find_autoconf;
|
|
|
|
parse_args;
|
|
init_tables;
|
|
find ('.');
|
|
scan_files;
|
|
output ('configure.scan');
|
|
|
|
if (-f 'configure.ac')
|
|
{
|
|
if (-f 'configure.in')
|
|
{
|
|
warn "warning: `configure.ac' and `configure.in' both present.\n";
|
|
warn "warning: proceeding with `configure.ac'.\n";
|
|
}
|
|
check_configure_ac ('configure.ac');
|
|
}
|
|
elsif (-f 'configure.in')
|
|
{
|
|
check_configure_ac ('configure.in');
|
|
}
|
|
|
|
exit 0;
|