mirror of
git://git.sv.gnu.org/autoconf
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328 lines
8.6 KiB
Perl
328 lines
8.6 KiB
Perl
#! @PERL@
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# -*- Perl -*-
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# @configure_input@
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eval 'exec @PERL@ -S $0 ${1+"$@"}'
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if 0;
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# autoheader -- create `config.h.in' from `configure.ac'
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# Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
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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 Roland McGrath.
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# Rewritten in Perl by Akim Demaille.
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BEGIN
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{
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my $datadir = ($ENV{'autom4te_perllibdir'}
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|| $ENV{'AC_MACRODIR'}
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|| '@datadir@');
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unshift @INC, "$datadir";
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}
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use Getopt::Long;
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use File::Basename;
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use File::Compare;
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use File::Copy;
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use File::Spec;
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use IO::File;
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use Autom4te::General;
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use strict;
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# Using `do FILE', we need `local' vars.
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use vars qw ($config_h %verbatim %symbol);
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# Lib files.
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my $autoconf_dir = $ENV{"AC_MACRODIR"} || "@datadir@";
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my $autoconf = $ENV{'AUTOCONF'} || '@autoconf-name@';
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local $config_h;
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my $config_h_in;
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my $localdir = '.';
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my $force = 0;
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my @include;
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my @warning;
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# m4.
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my $m4 = $ENV{"M4"} || "@M4@";
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my $SIMPLE_BACKUP_SUFFIX = $ENV{'SIMPLE_BACKUP_SUFFIX'} || '~';
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## ---------- ##
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## Routines. ##
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## ---------- ##
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# $FILENAME
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# find_file ($FILENAME)
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# ---------------------
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# We match exactly the behavior of GNU m4: first look in the current
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# directory (which includes the case of absolute file names), and, if
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# the file is not absolute, just fail. Otherwise, look in the path.
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#
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# If the file is flagged as optional (ends with `?'), then return undef
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# if absent.
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sub find_file ($)
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{
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my ($filename) = @_;
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my $optional = 0;
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$optional = 1
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if $filename =~ s/\?$//;
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return File::Spec->canonpath ($filename)
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if -e $filename;
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if (File::Spec->file_name_is_absolute ($filename))
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{
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die "$me: no such file or directory: $filename\n"
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unless $optional;
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return undef;
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}
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foreach my $path (@include)
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{
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return File::Spec->canonpath (File::Spec->catfile ($path, $filename))
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if -e File::Spec->catfile ($path, $filename)
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}
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die "$me: no such file or directory: $filename\n"
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unless $optional;
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return undef;
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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 <<"END";
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Usage: $0 [OPTION] ... [TEMPLATE-FILE]
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Create a template file of C \`#define\' statements for \`configure\' to
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use. To this end, scan TEMPLATE-FILE, or \`configure.ac\' if present,
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or else \`configure.in\'.
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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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-f, --force consider all the files are obsolete
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-W, --warnings=CATEGORY report the warnings falling in CATEGORY
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Warning categories include:
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\`obsolete\' obsolete constructs
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\`all\' all the warnings
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\`no-CATEGORY\' turn off the warnings on CATEGORY
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\`none\' turn off all the warnings
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\`error\' warnings are error
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Library directories:
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-A, --autoconf-dir=ACDIR Autoconf\'s macro 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>.
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END
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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 <<END;
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autoheader (@PACKAGE_NAME@) @VERSION@
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Written by Roland McGrath.
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Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
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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.
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END
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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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# F*k. Getopt seems bogus and dies when given `-' with `bundling'.
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# If fixed some day, use this: '' => sub { push @ARGV, "-" }
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my $stdin = grep /^-$/, @ARGV;
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@ARGV = grep !/^-$/, @ARGV;
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Getopt::Long::config ("bundling");
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Getopt::Long::GetOptions ('A|autoconf-dir|m|macrodir=s' => \$autoconf_dir,
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'l|localdir=s' => \$localdir,
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'd|debug' => \$debug,
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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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'f|force' => \$force,
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'W|warning' => \@warning)
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or exit 1;
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push @ARGV, '-'
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if $stdin;
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if (! @ARGV)
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{
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my $configure_ac = find_configure_ac;
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die "$me: no input file\n"
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unless $configure_ac;
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push @ARGV, $configure_ac;
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}
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}
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## -------------- ##
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## Main program. ##
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## -------------- ##
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mktmpdir ('ah');
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parse_args;
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# Preach.
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my $config_h_top = find_file ("config.h.top?");
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my $config_h_bot = find_file ("config.h.bot?");
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my $acconfig_h = find_file ("acconfig.h?");
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if ($config_h_top || $config_h_bot || $acconfig_h)
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{
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my $msg = << "END";
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Using auxiliary files such as \`acconfig.h\', \`config.h.bot\'
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and \`config.h.top\', to define templates for \`config.h.in\'
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is deprecated and discouraged.
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Using the third argument of \`AC_DEFINE\' and
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\`AC_DEFINE_UNQUOTED\' allows to define a template without
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\`acconfig.h\':
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AC_DEFINE([NEED_MAIN], 1,
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[Define if a function \`main\' is needed.])
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More sophisticated templates can also be produced, see the
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documentation.
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END
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$msg =~ s/^ /WARNING: /gm;
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print STDERR $msg;
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}
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# Set up autoconf.
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$autoconf .= " --include=$autoconf_dir --include=$localdir";
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$autoconf .= ' --verbose' if $verbose;
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$autoconf .= ' --debug' if $debug;
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# ----------------------- #
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# Real work starts here. #
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# ----------------------- #
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# Source what the traces are trying to tell us.
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verbose "$me: running $autoconf to trace from $ARGV[0]";
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xsystem ("$autoconf "
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. " --trace AC_CONFIG_HEADERS:'\$\$config_h ||= \"\$1\";'"
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. " --trace AH_OUTPUT:'\$\$verbatim{\$1} = \"\\\n\$2\";'"
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. " --trace AC_DEFINE_TRACE_LITERAL:'\$\$symbol{\"\$1\"} = 1;'"
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. " $ARGV[0] >$tmp/traces.pl");
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local (%verbatim, %symbol);
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do "$tmp/traces.pl";
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warn "couldn't parse $tmp/traces.pl: $@" if $@;
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die "$me: error: AC_CONFIG_HEADERS not found in $ARGV[0]\n"
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unless $config_h;
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# We template only the first CONFIG_HEADER.
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$config_h =~ s/ .*//;
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# Support "outfile[:infile]", defaulting infile="outfile.in".
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($config_h, $config_h_in) = split (':', $config_h, 2);
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$config_h_in ||= "$config_h.in";
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my $out = new IO::File (">$tmp/config.hin");
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# Don't write "do not edit" -- it will get copied into the
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# config.h, which it's ok to edit.
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print $out "/* $config_h_in. Generated from $ARGV[0] by autoheader. */\n";
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# Dump the top.
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# test -r $config_h.top && cat $config_h.top >>$tmp/config.hin
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#
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# # Dump `acconfig.h' but its bottom.
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# test -r $localdir/acconfig.h &&
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# sed '/@BOTTOM@/,$d;s/@TOP@//' $localdir/acconfig.h >>$tmp/config.hin
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# Dump the templates from `configure.ac'.
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foreach (sort keys %verbatim)
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{
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print $out "$verbatim{$_}\n";
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}
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$out->close;
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# # Handle the case where @BOTTOM@ is the first line of acconfig.h.
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# test -r $localdir/acconfig.h &&
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# grep @BOTTOM@ $localdir/acconfig.h >/dev/null &&
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# sed -n '/@BOTTOM@/,${/@BOTTOM@/!p;}' $localdir/acconfig.h >>$tmp/config.hin
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# test -f $config_h.bot && cat $config_h.bot >>$tmp/config.hin
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# # Check that all the symbols have a template.
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# $verbose $me: checking completeness of the template >&2
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# # Regexp for a white space.
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# w='[ ]'
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# if test -n "$syms"; then
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# for sym in $syms; do
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# if egrep "^#$w*[a-z]*$w$w*$sym($w*|$w.*)$" $tmp/config.hin >/dev/null; then
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# : # All is well.
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# else
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# echo "$me: No template for symbol \`$sym'" >&2
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# status=1
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# fi
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# done
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# fi
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if (compare ("$tmp/config.hin", "$config_h_in") == 0)
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{
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# File didn't change, so don't update its mod time.
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print STDERR "$me: `$config_h_in' is unchanged\n"
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}
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else
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{
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# Back up and install the new one.
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if (-f $config_h_in)
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{
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move ("$config_h_in", "$config_h_in$SIMPLE_BACKUP_SUFFIX")
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or die "$me: cannot not backup $config_h_in: $!\n";
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}
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move ("$tmp/config.hin", "$config_h_in")
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or die "$me: cannot not update $config_h_in: $!\n";
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# print STDERR "$me: `$config_h_in' is updated\n";
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}
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__END__
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(exit $status); exit $status
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