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#! /usr/bin/perl -w
# -*- perl -*-
# Generated from autoscan.in; do not edit by hand.
# autoscan - Create configure.scan (a preliminary configure.ac) for a package.
# Copyright (C) 1994, 1999-2012 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Written by David MacKenzie <djm@gnu.ai.mit.edu>.
eval 'case $# in 0) exec /usr/bin/perl -S "$0";; *) exec /usr/bin/perl -S "$0" "$@";; esac'
if 0;
BEGIN
{
my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '/usr/share/autoconf';
unshift @INC, $pkgdatadir;
# Override SHELL. On DJGPP SHELL may not be set to a shell
# that can handle redirection and quote arguments correctly,
# e.g.: COMMAND.COM. For DJGPP always use the shell that configure
# has detected.
$ENV{'SHELL'} = '/bin/sh' if ($^O eq 'dos');
}
use Autom4te::ChannelDefs;
use Autom4te::Configure_ac;
use Autom4te::General;
use Autom4te::FileUtils;
use Autom4te::XFile;
use File::Basename;
use File::Find;
use strict;
use vars qw(@cfiles @makefiles @shfiles @subdirs %printed);
# The kind of the words we are looking for.
my @kinds = qw (function header identifier program
makevar librarie);
# For each kind, the default macro.
my %generic_macro =
(
'function' => 'AC_CHECK_FUNCS',
'header' => 'AC_CHECK_HEADERS',
'identifier' => 'AC_CHECK_TYPES',
'program' => 'AC_CHECK_PROGS',
'library' => 'AC_CHECK_LIB'
);
my %kind_comment =
(
'function' => 'Checks for library functions.',
'header' => 'Checks for header files.',
'identifier' => 'Checks for typedefs, structures, and compiler characteristics.',
'program' => 'Checks for programs.',
);
# $USED{KIND}{ITEM} is the list of locations where the ITEM (of KIND) was used
# in the user package.
# For instance $USED{function}{alloca} is the list of `file:line' where
# `alloca (...)' appears.
my %used = ();
# $MACRO{KIND}{ITEM} is the list of macros to use to test ITEM.
# Initialized from lib/autoscan/*. E.g., $MACRO{function}{alloca} contains
# the singleton AC_FUNC_ALLOCA. Some require several checks.
my %macro = ();
# $NEEDED_MACROS{MACRO} is an array of locations requiring MACRO.
# E.g., $NEEDED_MACROS{AC_FUNC_ALLOC} the list of `file:line' containing
# `alloca (...)'.
my %needed_macros =
(
'AC_PREREQ' => [$me],
);
my $configure_scan = 'configure.scan';
my $log;
# Autoconf and lib files.
my $autom4te = $ENV{'AUTOM4TE'} || '/usr/bin/autom4te';
my $autoconf = "$autom4te --language=autoconf";
my @prepend_include;
my @include = ('/usr/share/autoconf');
# $help
# -----
$help = "Usage: $0 [OPTION]... [SRCDIR]
Examine source files in the directory tree rooted at SRCDIR, or the
current directory if none is given. Search the source files for
common portability problems, check for incompleteness of
`configure.ac', and create a file `$configure_scan' which is a
preliminary `configure.ac' for that package.
-h, --help print this help, then exit
-V, --version print version number, then exit
-v, --verbose verbosely report processing
-d, --debug don't remove temporary files
Library directories:
-B, --prepend-include=DIR prepend directory DIR to search path
-I, --include=DIR append directory DIR to search path
Report bugs to <bug-autoconf\@gnu.org>.
GNU Autoconf home page: <http://www.gnu.org/software/autoconf/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
";
# $version
# --------
$version = "autoscan (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by David J. MacKenzie and Akim Demaille.
";
## ------------------------ ##
## Command line interface. ##
## ------------------------ ##
# parse_args ()
# -------------
# Process any command line arguments.
sub parse_args ()
{
getopt ('I|include=s' => \@include,
'B|prepend-include=s' => \@prepend_include);
die "$me: too many arguments
Try `$me --help' for more information.\n"
if @ARGV > 1;
my $srcdir = $ARGV[0] || ".";
verb "srcdir = $srcdir";
chdir $srcdir || error "cannot cd to $srcdir: $!";
}
# init_tables ()
# --------------
# Put values in the tables of what to do with each token.
sub init_tables ()
{
# The data file format supports only one line of macros per function.
# If more than that is required for a common portability problem,
# a new Autoconf macro should probably be written for that case,
# instead of duplicating the code in lots of configure.ac files.
my $file = find_file ("autoscan/autoscan.list",
reverse (@prepend_include), @include);
my $table = new Autom4te::XFile "< " . open_quote ($file);
my $tables_are_consistent = 1;
while ($_ = $table->getline)
{
# Ignore blank lines and comments.
next
if /^\s*$/ || /^\s*\#/;
# '<kind>: <word> <macro invocation>' or...
# '<kind>: <word> warn: <message>'.
if (/^(\S+):\s+(\S+)\s+(\S.*)$/)
{
my ($kind, $word, $macro) = ($1, $2, $3);
error "$file:$.: invalid kind: $_"
unless grep { $_ eq $kind } @kinds;
push @{$macro{$kind}{$word}}, $macro;
}
else
{
error "$file:$.: invalid definition: $_";
}
}
if ($debug)
{
foreach my $kind (@kinds)
{
foreach my $word (sort keys %{$macro{$kind}})
{
print "$kind: $word: @{$macro{$kind}{$word}}\n";
}
}
}
}
# used ($KIND, $WORD, [$WHERE])
# -----------------------------
# $WORD is used as a $KIND.
sub used ($$;$)
{
my ($kind, $word, $where) = @_;
$where ||= "$File::Find::name:$.";
if (
# Check for all the libraries. But `-links' is certainly a
# `find' argument, and `-le', a `test' argument.
($kind eq 'library' && $word !~ /^(e|inks)$/)
# Other than libraries are to be checked only if listed in
# the Autoscan library files.
|| defined $macro{$kind}{$word}
)
{
push (@{$used{$kind}{$word}}, $where);
}
}
## ----------------------- ##
## Scanning source files. ##
## ----------------------- ##
# scan_c_file ($FILE-NAME)
# ------------------------
sub scan_c_file ($)
{
my ($file_name) = @_;
push @cfiles, $File::Find::name;
# Nonzero if in a multiline comment.
my $in_comment = 0;
my $file = new Autom4te::XFile "< " . open_quote ($file_name);
while ($_ = $file->getline)
{
# Strip out comments.
if ($in_comment && s,^.*?\*/,,)
{
$in_comment = 0;
}
# The whole line is inside a comment.
next if $in_comment;
# All on one line.
s,/\*.*?\*/,,g;
# Starting on this line.
if (s,/\*.*$,,)
{
$in_comment = 1;
}
# Preprocessor directives.
if (s/^\s*\#\s*//)
{
if (/^include\s*<([^>]*)>/)
{
used ('header', $1);
}
if (s/^(if|ifdef|ifndef|elif)\s+//)
{
foreach my $word (split (/\W+/))
{
used ('identifier', $word)
unless $word eq 'defined' || $word !~ /^[a-zA-Z_]/;
}
}
# Ignore other preprocessor directives.
next;
}
# Remove string and character constants.
s,\"[^\"]*\",,g;
s,\'[^\']*\',,g;
# Tokens in the code.
# Maybe we should ignore function definitions (in column 0)?
while (s/\b([a-zA-Z_]\w*)\s*\(/ /)
{
used ('function', $1);
}
while (s/\b([a-zA-Z_]\w*)\b/ /)
{
used ('identifier', $1);
}
}
$file->close;
}
# scan_makefile($MAKEFILE-NAME)
# -----------------------------
sub scan_makefile ($)
{
my ($file_name) = @_;
push @makefiles, $File::Find::name;
my $file = new Autom4te::XFile "< " . open_quote ($file_name);
while ($_ = $file->getline)
{
# Strip out comments.
s/#.*//;
# Variable assignments.
while (s/\b([a-zA-Z_]\w*)\s*=/ /)
{
used ('makevar', $1);
}
# Be sure to catch a whole word. For instance `lex$U.$(OBJEXT)'
# is a single token. Otherwise we might believe `lex' is needed.
foreach my $word (split (/\s+/))
{
# Libraries.
if ($word =~ /^-l([a-zA-Z_]\w*)$/)
{
used ('library', $1);
}
# Tokens in the code.
# We allow some additional characters, e.g., `+', since
# autoscan/programs includes `c++'.
if ($word =~ /^[a-zA-Z_][\w+]*$/)
{
used ('program', $word);
}
}
}
$file->close;
}
# scan_sh_file($SHELL-SCRIPT-NAME)
# --------------------------------
sub scan_sh_file ($)
{
my ($file_name) = @_;
push @shfiles, $File::Find::name;
my $file = new Autom4te::XFile "< " . open_quote ($file_name);
while ($_ = $file->getline)
{
# Strip out comments and variable references.
s/#.*//;
s/\${[^\}]*}//g;
s/@[^@]*@//g;
# Tokens in the code.
while (s/\b([a-zA-Z_]\w*)\b/ /)
{
used ('program', $1);
}
}
$file->close;
}
# scan_file ()
# ------------
# Called by &find on each file. $_ contains the current file name with
# the current directory of the walk through.
sub scan_file ()
{
# Wanted only if there is no corresponding FILE.in.
return
if -f "$_.in";
# Save $_ as Find::File requires it to be preserved.
local $_ = $_;
# Strip a useless leading `./'.
$File::Find::name =~ s,^\./,,;
if ($_ ne '.' and -d $_ and
-f "$_/configure.in" ||
-f "$_/configure.ac" ||
-f "$_/configure.gnu" ||
-f "$_/configure")
{
$File::Find::prune = 1;
push @subdirs, $File::Find::name;
}
if (/\.[chlym](\.in)?$/)
{
used 'program', 'cc', $File::Find::name;
scan_c_file ($_);
}
elsif (/\.(cc|cpp|cxx|CC|C|hh|hpp|hxx|HH|H|yy|ypp|ll|lpp)(\.in)?$/)
{
used 'program', 'c++', $File::Find::name;
scan_c_file ($_);
}
elsif ((/^((?:GNUm|M|m)akefile)(\.in)?$/ && ! -f "$1.am")
|| /^(?:GNUm|M|m)akefile(\.am)?$/)
{
scan_makefile ($_);
}
elsif (/\.sh(\.in)?$/)
{
scan_sh_file ($_);
}
}
# scan_files ()
# -------------
# Read through the files and collect lists of tokens in them
# that might create nonportabilities.
sub scan_files ()
{
find (\&scan_file, '.');
if ($verbose)
{
print "cfiles: @cfiles\n";
print "makefiles: @makefiles\n";
print "shfiles: @shfiles\n";
foreach my $kind (@kinds)
{
print "\n$kind:\n";
foreach my $word (sort keys %{$used{$kind}})
{
print "$word: @{$used{$kind}{$word}}\n";
}
}
}
}
## ----------------------- ##
## Output configure.scan. ##
## ----------------------- ##
# output_kind ($FILE, $KIND)
# --------------------------
sub output_kind ($$)
{
my ($file, $kind) = @_;
# Lists of words to be checked with the generic macro.
my @have;
print $file "\n# $kind_comment{$kind}\n"
if exists $kind_comment{$kind};
foreach my $word (sort keys %{$used{$kind}})
{
# Output the needed macro invocations in $configure_scan if not
# already printed, and remember these macros are needed.
foreach my $macro (@{$macro{$kind}{$word}})
{
if ($macro =~ /^warn:\s+(.*)/)
{
my $message = $1;
foreach my $location (@{$used{$kind}{$word}})
{
warn "$location: warning: $message\n";
}
}
elsif (exists $generic_macro{$kind}
&& $macro eq $generic_macro{$kind})
{
push (@have, $word);
push (@{$needed_macros{"$generic_macro{$kind}([$word])"}},
@{$used{$kind}{$word}});
}
else
{
if (! $printed{$macro})
{
print $file "$macro\n";
$printed{$macro} = 1;
}
push (@{$needed_macros{$macro}},
@{$used{$kind}{$word}});
}
}
}
print $file "$generic_macro{$kind}([" . join(' ', sort(@have)) . "])\n"
if @have;
}
# output_libraries ($FILE)
# ------------------------
sub output_libraries ($)
{
my ($file) = @_;
print $file "\n# Checks for libraries.\n";
foreach my $word (sort keys %{$used{'library'}})
{
print $file "# FIXME: Replace `main' with a function in `-l$word':\n";
print $file "AC_CHECK_LIB([$word], [main])\n";
}
}
# output ($CONFIGURE_SCAN)
# ------------------------
# Print a proto configure.ac.
sub output ($)
{
my $configure_scan = shift;
my %unique_makefiles;
my $file = new Autom4te::XFile "> " . open_quote ($configure_scan);
print $file
("# -*- Autoconf -*-\n" .
"# Process this file with autoconf to produce a configure script.\n" .
"\n" .
"AC_PREREQ([2.69])\n" .
"AC_INIT([FULL-PACKAGE-NAME], [VERSION], [BUG-REPORT-ADDRESS])\n");
if (defined $cfiles[0])
{
print $file "AC_CONFIG_SRCDIR([$cfiles[0]])\n";
print $file "AC_CONFIG_HEADERS([config.h])\n";
}
output_kind ($file, 'program');
output_kind ($file, 'makevar');
output_libraries ($file);
output_kind ($file, 'header');
output_kind ($file, 'identifier');
output_kind ($file, 'function');
print $file "\n";
if (@makefiles)
{
# Change DIR/Makefile.in to DIR/Makefile.
foreach my $m (@makefiles)
{
$m =~ s/\.(?:in|am)$//;
$unique_makefiles{$m}++;
}
print $file ("AC_CONFIG_FILES([",
join ("\n ",
sort keys %unique_makefiles), "])\n");
}
if (@subdirs)
{
print $file ("AC_CONFIG_SUBDIRS([",
join ("\n ",
sort @subdirs), "])\n");
}
print $file "AC_OUTPUT\n";
$file->close;
}
## --------------------------------------- ##
## Checking the accuracy of configure.ac. ##
## --------------------------------------- ##
# &check_configure_ac ($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)));
verb "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;
$log = new Autom4te::XFile "> " . open_quote ("$me.log");
$autoconf .= " --debug" if $debug;
$autoconf .= " --verbose" if $verbose;
$autoconf .= join (' --include=', '', map { shell_quote ($_) } @include);
$autoconf .= join (' --prepend-include=', '', map { shell_quote ($_) } @prepend_include);
my $configure_ac = find_configure_ac;
init_tables;
scan_files;
output ('configure.scan');
if (-f $configure_ac)
{
check_configure_ac ($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:
