mirror of
git://git.sv.gnu.org/autoconf
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d3f9e418ab
* bin/autoheader.in, bin/autoupdate.in (&parse_args): Adjust. * bin/autoscan.in: Use `getopt' and `find_files' etc. Add -I, --include support. * doc/autoconf.texi (autoscan Invocation): Adjust.
591 lines
15 KiB
Perl
591 lines
15 KiB
Perl
#! @PERL@ -w
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# -*- perl -*-
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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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BEGIN
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{
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my $perllibdir = $ENV{'autom4te_perllibdir'} || "@datadir@";
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unshift @INC, "$perllibdir";
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}
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use File::Basename;
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use File::Find;
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use IO::File;
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use Autom4te::General;
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use strict;
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use vars qw(@cfiles @makefiles @shfiles %c_keywords %printed);
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# $USED{KIND}{ITEM} is set if ITEM is used in the program.
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# It is set to its list of locations.
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my %used = ();
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# $MACRO{KIND}{ITEM} is the list of macros to use to test ITEM.
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my %macro = ();
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# $NEEDED_MACROS{MACRO} is an array of locations requiring MACRO.
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my %needed_macros = ();
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my @kinds = qw (functions headers identifiers programs makevars libraries);
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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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'libraries' => 'AC_CHECK_LIB'
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);
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my %kind_comment =
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(
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'functions' => 'Checks for library functions.',
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'headers' => 'Checks for header files.',
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'identifiers' => 'Checks for typedefs, structures, and compiler characteristics.',
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'programs' => 'Checks for programs.',
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);
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my $configure_scan = 'configure.scan';
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my $log = new IO::File ">$me.log"
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or die "$me: cannot open $me.log: $!\n";
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# Autoconf and lib files.
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my $autom4te = $ENV{'AUTOM4TE'} || '@autom4te-name@';
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my $autoconf = "$autom4te --language=autoconf";
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my @include = ('@datadir@');
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# $help
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# -----
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$help = "Usage: $0 [OPTION] ... [SRCDIR]
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Examine source files in the directory tree rooted at SRCDIR, or the
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current directory if none is given. Search the source files for
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common portability problems, check for incompleteness of
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`configure.ac', and create a file `$configure_scan' which is a
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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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-d, --debug don't remove temporary files
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-I, --include=DIR look for input files in DIR. Accumulates
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Report bugs to <bug-autoconf\@gnu.org>.\n";
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# $version
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# --------
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$version = "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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## ------------------------ ##
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## Command line interface. ##
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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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getopt ("I|include|A|autoconf-dir|m|macrodir=s" => \@include);
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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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my $srcdir = $ARGV[0] || ".";
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verbose "srcdir = $srcdir";
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chdir $srcdir || die "$me: cannot cd to $srcdir: $!\n";
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}
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# init_tables ()
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# --------------
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# Put values in the tables of what to do with each token.
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sub init_tables ()
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{
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# Initialize a table of C keywords (to ignore).
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# Taken from K&R 1st edition p. 180.
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# ANSI C, GNU C, and C++ keywords can introduce portability problems,
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# so don't ignore them.
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foreach (qw (int char float double struct union long short unsigned
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auto extern register typedef static goto return sizeof break
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continue if else for do while switch case default))
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{
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$c_keywords{$_} = 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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my $tables_are_consistent = 1;
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foreach my $kind (@kinds)
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{
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my $file = find_file ("autoscan/$kind", @include);
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my $table = new IO::File $file
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or die "$me: cannot open $file: $!\n";
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while ($_ = $table->getline)
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{
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# Ignore blank lines and comments.
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next
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if /^\s*$/ || /^\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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# The default macro must be explicitly listed for words
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# which have a specific macros. This allows to enforce
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# consistency checks.
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if (!defined $2 && exists $macro{$kind}{$word})
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{
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warn ("$file:$.: "
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. "ignoring implicit call to the generic macro for $word\n");
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$tables_are_consistent = 0;
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}
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else
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{
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push @{$macro{$kind}{$word}}, $macro;
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}
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}
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$table->close
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or die "$me: cannot close $file: $!\n";
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}
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die "$me: some tables are inconsistent\n"
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if !$tables_are_consistent;
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}
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## ----------------------- ##
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## Scanning source files. ##
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## ----------------------- ##
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# scan_c_file($FILENAME)
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# ----------------------
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sub scan_c_file ($)
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{
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my ($filename) = @_;
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push (@cfiles, $File::Find::name);
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# Nonzero if in a multiline comment.
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my $in_comment = 0;
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my $file = new IO::File "<$filename"
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or die "$me: cannot open $filename: $!\n";
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while ($_ = $file->getline)
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{
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# Strip out comments, approximately.
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# Ending on this line.
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if ($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 $in_comment;
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# Preprocessor directives.
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if (/^\s*\#\s*include\s*<([^>]*)>/)
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{
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push (@{$used{'headers'}{$1}}, "$File::Find::name:$.");
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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 (@{$used{'functions'}{$1}}, "$File::Find::name:$.")
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if !defined $c_keywords{$1};
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}
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$used{'identifiers'}{$1}}, "$File::Find::name:$.")
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if !defined $c_keywords{$1};
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}
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}
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$file->close
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or die "$me: cannot close $filename: $!\n";
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}
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# scan_makefile($MAKEFILE-NAME)
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# -----------------------------
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sub scan_makefile ($)
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{
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my ($filename) = @_;
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push (@makefiles, $File::Find::name);
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my $file = new IO::File "<$filename"
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or die "$me: cannot open $filename: $!\n";
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while ($_ = $file->getline)
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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 (@{$used{'makevars'}{$1}}, "$File::Find::name:$.");
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}
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# Libraries.
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while (s/\B-l([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$used{'libraries'}{$1}}, "$File::Find::name:$.");
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}
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# Tokens in the code.
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while (s/(?<![-\w.])([a-zA-Z_][\w+.-]+)/ /)
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{
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push (@{$used{'programs'}{$1}}, "$File::Find::name:$.");
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}
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}
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$file->close
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or die "$me: cannot close $filename: $!\n";
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}
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# scan_sh_file($SHELL-SCRIPT-NAME)
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# --------------------------------
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sub scan_sh_file ($)
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{
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my ($filename) = @_;
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push (@shfiles, $File::Find::name);
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my $file = new IO::File "<$filename"
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or die "$me: cannot open $filename: $!\n";
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while ($_ = $file->getline)
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{
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# Strip out comments and variable references.
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s/#.*//;
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s/#.*//;
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s/\${[^\}]*}//g;
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s/@[^@]*@//g;
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# Tokens in the code.
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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push (@{$used{'programs'}{$1}}, "$File::Find::name:$.");
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}
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}
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$file->close
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or die "$me: cannot close $filename: $!\n";
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}
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# scan_file ()
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# ------------
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# Called by &find on each file. $_ contains the current filename with
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# the current directory of the walk through.
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sub scan_file ()
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{
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# Wanted only if there is no corresponding FILE.in.
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return
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if -f "$_.in";
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# Save $_ as Find::File requires it to be preserved.
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my $underscore = $_;
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# Strip a useless leading `./'.
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$File::Find::name =~ s,^\./,,;
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if (/\.[chlym](\.in)?$/)
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{
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push (@{$used{'programs'}{"cc"}}, $File::Find::name);
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scan_c_file ($_);
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}
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elsif (/\.(cc|cpp|cxx|CC|C|hh|hpp|hxx|HH|H|yy|ypp|ll|lpp)(\.in)?$/)
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{
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push (@{$used{'programs'}{"c++"}}, $File::Find::name);
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scan_c_file ($_);
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}
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elsif (/^[Mm]akefile(\.in)?$/ || /^GNUmakefile(\.in)?$/)
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{
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scan_makefile ($_);
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}
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elsif (/\.sh(\.in)?$/)
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{
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scan_sh_file ($_);
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}
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$_ = $underscore;
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}
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# scan_files ()
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# -------------
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# Read through the files and collect lists of tokens in them
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# that might create nonportabilities.
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sub scan_files ()
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{
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find (\&scan_file, '.');
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if ($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 $kind (@kinds)
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{
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print "\n$kind:\n";
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foreach my $word (sort keys %{$used{$kind}})
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{
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print "$word: @{$used{$kind}{$word}}\n";
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}
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}
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}
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}
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## ----------------------- ##
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## Output configure.scan. ##
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## ----------------------- ##
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# output_kind ($FILE, $KIND)
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# --------------------------
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sub output_kind ($$)
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{
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my ($file, $kind) = @_;
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# Lists of words to be checked with the generic macro.
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my @have;
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print $file "\n# $kind_comment{$kind}\n"
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if exists $kind_comment{$kind};
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foreach my $word (sort keys %{$used{$kind}})
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{
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# Words that were caught, but not to be checked according to
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# the autoscan library files.
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next
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if ! exists $macro{$kind}{$word};
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# Output the needed macro invocations in $configure_scan if not
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# already printed, and remember these macros are needed.
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foreach my $macro (@{$macro{$kind}{$word}})
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{
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if (exists $generic_macro{$kind}
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&& $macro eq $generic_macro{$kind})
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{
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push (@have, $word);
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push (@{$needed_macros{"$generic_macro{$kind}([$word])"}},
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@{$used{$kind}{$word}});
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}
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else
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{
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if (! $printed{$macro})
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{
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print $file "$macro\n";
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$printed{$macro} = 1;
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}
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push (@{$needed_macros{$macro}},
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@{$used{$kind}{$word}});
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}
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}
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}
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print $file "$generic_macro{$kind}([" . join(' ', sort(@have)) . "])\n"
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if @have;
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}
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# output_libraries ($FILE)
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# ------------------------
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sub output_libraries ($)
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{
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my ($file) = @_;
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print $file "\n# Checks for libraries.\n";
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foreach my $word (sort keys %{$used{'libraries'}})
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{
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print $file "# FIXME: Replace `main' with a function in `-l$word':\n";
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print $file "AC_CHECK_LIB([$word], [main])\n";
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}
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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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my $file = new IO::File ">$configure_scan"
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or die "$me: cannot create $configure_scan: $!\n";
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print $file "# Process this file with autoconf to produce a configure script.\n";
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print $file "AC_INIT(FULL-PACKAGE-NAME, VERSION, BUG-REPORT-ADDRESS)\n";
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if (defined $cfiles[0])
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{
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print $file "AC_CONFIG_SRCDIR([$cfiles[0]])\n";
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print $file "AC_CONFIG_HEADER([config.h])\n";
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}
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output_kind ($file, 'programs');
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output_kind ($file, 'makevars');
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output_libraries ($file);
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output_kind ($file, 'headers');
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output_kind ($file, 'identifiers');
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output_kind ($file, '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 $file "\nAC_CONFIG_FILES([",
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join ("\n ", sort keys %unique_makefiles), "])\n";
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print $file "AC_OUTPUT\n";
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$file->close
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or die "$me: cannot close $configure_scan: $!\n";
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}
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## --------------------------------------- ##
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## Checking the accuracy of configure.ac. ##
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## --------------------------------------- ##
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# check_configure_ac ($CONFIGURE_AC)
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# ----------------------------------
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# Use autoconf to check if all the suggested macros are included
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# in CONFIGURE_AC.
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sub check_configure_ac ($)
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{
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my ($configure_ac) = @_;
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# Find what needed macros are invoked in CONFIGURE_AC.
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# I'd be very happy if someone could explain to me why sort (uniq ...)
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# doesn't work properly: I need `uniq (sort ...)'. --akim
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my $trace_option =
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join (' -t ', '',
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uniq (sort (map { s/\(.*//; $_ } keys %needed_macros)));
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verbose "running: $autoconf $trace_option $configure_ac";
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my $traces =
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new IO::File "$autoconf $trace_option $configure_ac|"
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or die "$me: cannot open traces reading pipe: $!\n";
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while ($_ = $traces->getline)
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{
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chomp;
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my ($file, $line, $macro, @args) = split (/:/, $_);
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if ($macro =~ /^AC_CHECK_(HEADER|FUNC|TYPE|MEMBER)S$/)
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{
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# To be rigorous, we should distinguish between space and comma
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# separated macros. But there is no point.
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foreach my $word (split (/\s|,/, $args[0]))
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{
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# AC_CHECK_MEMBERS wants `struct' or `union'.
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if ($macro eq "AC_CHECK_MEMBERS"
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&& $word =~ /^stat.st_/)
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{
|
|
$word = "struct " . $word;
|
|
}
|
|
delete ($needed_macros{"$macro([$word])"});
|
|
}
|
|
}
|
|
else
|
|
{
|
|
delete ($needed_macros{$macro});
|
|
}
|
|
}
|
|
|
|
$traces->close
|
|
or die "$me: cannot close traces reading pipe: $!\n";
|
|
|
|
# Report the missing macros.
|
|
foreach my $macro (sort keys %needed_macros)
|
|
{
|
|
warn ("$configure_ac: warning: missing $macro wanted by: "
|
|
. (${$needed_macros{$macro}}[0])
|
|
. "\n");
|
|
print $log "$me: warning: missing $macro wanted by: \n";
|
|
foreach my $need (@{$needed_macros{$macro}})
|
|
{
|
|
print $log "\t$need\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
## -------------- ##
|
|
## Main program. ##
|
|
## -------------- ##
|
|
|
|
parse_args;
|
|
$autoconf .= " --debug" if $debug;
|
|
$autoconf .= " --verbose" if $verbose;
|
|
$autoconf .= join (' --include=', '', @include);
|
|
|
|
my $configure_ac = find_configure_ac;
|
|
init_tables;
|
|
scan_files;
|
|
output ('configure.scan');
|
|
if ($configure_ac)
|
|
{
|
|
check_configure_ac ($configure_ac);
|
|
}
|
|
|
|
$log->close
|
|
or die "$me: cannot close $me.log: $!\n";
|
|
|
|
exit 0;
|