mirror of
git://git.sv.gnu.org/autoconf
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ff9230c146
changes. * lib/Autom4te/General.pm (&backname): Remove, no longer used by Autoconf nor Automake. (&contents): New, from Automake. PODify. * lib/autoconf/c.m4 (_AC_PROG_CXX_EXIT_DECLARATION): Remove `#include <stdlib.h>' from the list; we should never
653 lines
16 KiB
Perl
653 lines
16 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 (C) 1994, 1999, 2000, 2001, 2002, 2003
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# 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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eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
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if 0;
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BEGIN
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{
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my $datadir = $ENV{'autom4te_perllibdir'} || '@datadir@';
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unshift @INC, $datadir;
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# Override SHELL. On DJGPP SHELL may not be set to a shell
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# that can handle redirection and quote arguments correctly,
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# e.g.: COMMAND.COM. For DJGPP always use the shell that configure
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# has detected.
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$ENV{'SHELL'} = '@SHELL@' if ($^O eq 'dos');
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}
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use Autom4te::General;
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use Autom4te::XFile;
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use File::Basename;
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use File::Find;
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use strict;
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use vars qw(@cfiles @makefiles @shfiles %printed);
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# The kind of the words we are looking for.
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my @kinds = qw (function header identifier program
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makevar librarie);
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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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'function' => 'AC_CHECK_FUNCS',
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'header' => 'AC_CHECK_HEADERS',
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'identifier' => 'AC_CHECK_TYPES',
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'program' => 'AC_CHECK_PROGS',
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'library' => 'AC_CHECK_LIB'
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);
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my %kind_comment =
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(
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'function' => 'Checks for library functions.',
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'header' => 'Checks for header files.',
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'identifier' => 'Checks for typedefs, structures, and compiler characteristics.',
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'program' => 'Checks for programs.',
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);
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# $USED{KIND}{ITEM} is the list of locations where the ITEM (of KIND) was used
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# in the user package.
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# For instance $USED{function}{alloca} is the list of `file:line' where
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# `alloca (...)' appears.
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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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# Initialized from lib/autoscan/*. E.g., $MACRO{function}{alloca} contains
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# the singleton AC_FUNC_ALLOCA. Some require several checks.
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my %macro = ();
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# $NEEDED_MACROS{MACRO} is an array of locations requiring MACRO.
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# E.g., $NEEDED_MACROS{AC_FUNC_ALLOC} the list of `file:line' containing
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# `alloca (...)'.
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my %needed_macros =
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(
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'AC_PREREQ' => [$me],
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);
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my $configure_scan = 'configure.scan';
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my $log = new Autom4te::XFile ">$me.log";
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# Autoconf and lib files.
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my $autom4te = $ENV{'AUTOM4TE'} || '@bindir@/@autom4te-name@';
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my $autoconf = "$autom4te --language=autoconf";
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my @prepend_include;
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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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Library directories:
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-B, --prepend-include=DIR prepend directory DIR to search path
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-I, --include=DIR append directory DIR to search path
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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 and Akim Demaille.
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Copyright (C) 2003 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=s' => \@include,
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'B|prepend-include=s' => \@prepend_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 || error "cannot cd to $srcdir: $!";
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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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# 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 $file = find_file ("autoscan/autoscan.list",
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reverse (@prepend_include), @include);
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my $table = new Autom4te::XFile $file;
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my $tables_are_consistent = 1;
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while ($_ = $table->getline)
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{
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# Ignore blank lines and comments.
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next
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if /^\s*$/ || /^\s*\#/;
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# '<kind>: <word> <macro invocation>' or...
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# '<kind>: <word> warn: <message>'.
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if (/^(\S+):\s+(\S+)\s+(\S.*)$/)
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{
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my ($kind, $word, $macro) = ($1, $2, $3);
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error "$file:$.: invalid kind: $_"
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unless grep { $_ eq $kind } @kinds;
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push @{$macro{$kind}{$word}}, $macro;
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}
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else
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{
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error "$file:$.: invalid definition: $_";
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}
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}
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if ($debug)
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{
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foreach my $kind (@kinds)
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{
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foreach my $word (sort keys %{$macro{$kind}})
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{
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print "$kind: $word: @{$macro{$kind}{$word}}\n";
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}
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}
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}
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}
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# used ($KIND, $WORD, [$WHERE])
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# -----------------------------
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# $WORD is used as a $KIND.
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sub used ($$;$)
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{
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my ($kind, $word, $where) = @_;
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$where ||= "$File::Find::name:$.";
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if (
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# Check for all the libraries. But `-links' is certainly a
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# `find' argument, and `-le', a `test' argument.
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($kind eq 'library' && $word !~ /^(e|inks)$/)
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# Other than libraries are to be checked only if listed in
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# the Autoscan library files.
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|| defined $macro{$kind}{$word}
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)
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{
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push (@{$used{$kind}{$word}}, $where);
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}
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}
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## ----------------------- ##
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## Scanning source files. ##
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## ----------------------- ##
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# scan_c_file ($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 $file = new Autom4te::XFile "<$filename";
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while ($_ = $file->getline)
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{
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# Strip out comments.
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if ($in_comment && s,^.*?\*/,,)
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{
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$in_comment = 0;
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}
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# The whole line is inside a commment.
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next if $in_comment;
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# All on one line.
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s,/\*.*?\*/,,g;
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# Starting on this line.
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if (s,/\*.*$,,)
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{
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$in_comment = 1;
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}
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# Preprocessor directives.
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if (s/^\s*\#\s*//)
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{
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if (/^include\s*<([^>]*)>/)
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{
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used ('header', $1);
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}
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if (s/^(if|ifdef|ifndef|elif)\s+//)
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{
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foreach my $word (split (/\W+/))
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{
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used ('identifier', $word)
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unless $word eq 'defined' || $word !~ /^[a-zA-Z_]/;
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}
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}
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# Ignore other preprocessor directives.
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next;
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}
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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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used ('function', $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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used ('identifier', $1);
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}
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}
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$file->close;
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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 $file = new Autom4te::XFile "<$filename";
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while ($_ = $file->getline)
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{
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# Strip out comments.
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s/#.*//;
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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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used ('makevar', $1);
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}
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# Be sure to catch a whole word. For instance `lex$U.$(OBJEXT)'
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# is a single token. Otherwise we might believe `lex' is needed.
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foreach my $word (split (/\s+/))
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{
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# Libraries.
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if ($word =~ /^-l([a-zA-Z_]\w*)$/)
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{
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used ('library', $1);
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}
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# Tokens in the code.
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# We allow some additional characters, e.g., `+', since
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# autoscan/programs includes `c++'.
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if ($word =~ /^[a-zA-Z_][\w+]*$/)
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{
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used ('program', $word);
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}
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}
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}
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$file->close;
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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 $file = new Autom4te::XFile "<$filename";
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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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# Tokens in the code.
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while (s/\b([a-zA-Z_]\w*)\b/ /)
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{
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used ('program', $1);
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}
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}
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$file->close;
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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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local $_ = $_;
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# Strip a useless leading `./'.
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$File::Find::name =~ s,^\./,,;
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if (/\.[chlym](\.in)?$/)
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{
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used 'program', '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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used 'program', 'c++', $File::Find::name;
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scan_c_file ($_);
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}
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elsif ((/^((?:GNUm|M|m)akefile)(\.in)?$/ && ! -f "$1.am")
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|| /^(?:GNUm|M|m)akefile(\.am)?$/)
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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 ($_);
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}
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}
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# scan_files ()
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# -------------
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# Read through the files and collect lists of tokens in them
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# that might create nonportabilities.
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sub scan_files ()
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{
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find (\&scan_file, '.');
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if ($verbose)
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{
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print "cfiles: @cfiles\n";
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print "makefiles: @makefiles\n";
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print "shfiles: @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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# 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 ($macro =~ /^warn:\s+(.*)/)
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{
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my $message = $1;
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foreach my $location (@{$used{$kind}{$word}})
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{
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warn "$location: warning: $message\n";
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}
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}
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elsif (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{'library'}})
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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 $file = new Autom4te::XFile ">$configure_scan";
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print $file
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("# -*- Autoconf -*-\n" .
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"# Process this file with autoconf to produce a configure script.\n" .
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"\n" .
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"AC_PREREQ(@VERSION@)\n" .
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"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, 'program');
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output_kind ($file, 'makevar');
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output_libraries ($file);
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output_kind ($file, 'header');
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output_kind ($file, 'identifier');
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output_kind ($file, 'function');
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if (@makefiles)
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{
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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|am)$//;
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$unique_makefiles{$m}++;
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}
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print $file ("\nAC_CONFIG_FILES([",
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join ("\n ",
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sort keys %unique_makefiles), "])\n");
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}
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print $file "AC_OUTPUT\n";
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$file->close;
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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 ($CONFIGURE_AC)
|
|
# -----------------------------------
|
|
# Use autoconf to check if all the suggested macros are included
|
|
# in CONFIGURE_AC.
|
|
sub check_configure_ac ($)
|
|
{
|
|
my ($configure_ac) = @_;
|
|
|
|
# Find what needed macros are invoked in CONFIGURE_AC.
|
|
# I'd be very happy if someone could explain to me why sort (uniq ...)
|
|
# doesn't work properly: I need `uniq (sort ...)'. --akim
|
|
my $trace_option =
|
|
join (' --trace=', '',
|
|
uniq (sort (map { s/\(.*//; $_ } keys %needed_macros)));
|
|
|
|
verbose "running: $autoconf $trace_option $configure_ac";
|
|
my $traces =
|
|
new Autom4te::XFile "$autoconf $trace_option $configure_ac|";
|
|
|
|
while ($_ = $traces->getline)
|
|
{
|
|
chomp;
|
|
my ($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};
|
|
}
|
|
}
|
|
|
|
$traces->close;
|
|
|
|
# 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);
|
|
$autoconf .= join (' --prepend-include=', '', @prepend_include);
|
|
|
|
my $configure_ac = find_configure_ac;
|
|
init_tables;
|
|
scan_files;
|
|
output ('configure.scan');
|
|
if ($configure_ac)
|
|
{
|
|
check_configure_ac ($configure_ac);
|
|
}
|
|
# This close is really needed. For some reason, probably best named
|
|
# a bug, it seems that the dtor of $LOG is not called automatically
|
|
# at END. It results in a truncated file.
|
|
$log->close;
|
|
exit 0;
|
|
|
|
### Setup "GNU" style for perl-mode and cperl-mode.
|
|
## Local Variables:
|
|
## perl-indent-level: 2
|
|
## perl-continued-statement-offset: 2
|
|
## perl-continued-brace-offset: 0
|
|
## perl-brace-offset: 0
|
|
## perl-brace-imaginary-offset: 0
|
|
## perl-label-offset: -2
|
|
## cperl-indent-level: 2
|
|
## cperl-brace-offset: 0
|
|
## cperl-continued-brace-offset: 0
|
|
## cperl-label-offset: -2
|
|
## cperl-extra-newline-before-brace: t
|
|
## cperl-merge-trailing-else: nil
|
|
## cperl-continued-statement-offset: 2
|
|
## End:
|