autoconf/bin/autoscan.in
Akim Demaille 83afb4f7ce * autoscan.pl: Be ready to handle AC_CHECK_TYPES requests.
Quote properly the output.
Remove useless backslashes.
2000-08-01 11:12:12 +00:00

417 lines
10 KiB
Plaintext

#! @PERL@ -w
# autoscan - Create configure.scan (a preliminary configure.in) for a package.
# Copyright (C) 1994, 99, 2000 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 2, 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
# Written by David MacKenzie <djm@gnu.ai.mit.edu>.
require "find.pl";
use Getopt::Long;
$datadir = $ENV{"AC_MACRODIR"} || "@datadir@";
($me = $0) =~ s,.*/,,;
$verbose = 0;
# Reference these variables to pacify perl -w.
undef %identifiers_macros;
undef %makevars_macros;
undef %programs_macros;
&parse_args;
&init_tables;
&find('.');
&scan_files;
&output;
exit 0;
# Display usage (--help).
sub print_usage
{
print "Usage: $0 [OPTION] ... [SRCDIR]
Examine source files in the directory tree rooted at SRCDIR, or the
current directory if none is given. Search the source files for
common portability problems and create a file `configure.scan' which
is a preliminary `configure.in' for that package.
-h, --help print this help, then exit
-V, --version print version number, then exit
-v, --verbose verbosely report processing
Library directories:
-A, --autoconf-dir=ACDIR Autoconf's files location (rarely needed)
-l, --localdir=DIR location of `aclocal.m4' and `acconfig.h'
Report bugs to <bug-autoconf\@gnu.org>.\n";
exit 0;
}
# Display version (--version).
sub print_version
{
print "autoscan (GNU @PACKAGE@) @VERSION@
Written by David J. MacKenzie.
Copyright (C) 1994, 99, 2000 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
exit 0;
}
# Process any command line arguments.
sub parse_args
{
Getopt::Long::Configure ("bundling");
Getopt::Long::GetOptions ("A|autoconf-dir|m|macrodir=s" => \$datadir,
"h|help" => \&print_usage,
"V|version" => \&print_version,
"v|verbose+" => \$verbose)
or exit 1;
die "$me: too many arguments
Try `$me --help' for more information.\n"
if (@ARGV > 1);
($srcdir) = @ARGV;
$srcdir = "."
if !defined($srcdir);
print "srcdir=$srcdir\n" if $verbose;
chdir $srcdir || die "$me: cannot cd to $srcdir: $!\n";
open (CONF, ">configure.scan") ||
die "$me: cannot create configure.scan: $!\n";
}
# Put values in the tables of what to do with each token.
sub init_tables
{
local($kind, $word, $macro);
# Initialize a table of C keywords (to ignore).
# Taken from K&R 1st edition p. 180.
# ANSI C, GNU C, and C++ keywords can introduce portability problems,
# so don't ignore them.
foreach $word ('int', 'char', 'float', 'double', 'struct', 'union',
'long', 'short', 'unsigned', 'auto', 'extern', 'register',
'typedef', 'static', 'goto', 'return', 'sizeof', 'break',
'continue', 'if', 'else', 'for', 'do', 'while', 'switch',
'case', 'default') {
$c_keywords{$word} = 0;
}
# 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.in files.
foreach $kind ('functions', 'headers', 'identifiers', 'programs',
'makevars') {
open(TABLE, "<$datadir/ac$kind") ||
die "$me: cannot open $datadir/ac$kind: $!\n";
while (<TABLE>) {
next if /^\s*$/ || /^\s*#/; # Ignore blank lines and comments.
($word, $macro) = split;
eval "\$$kind" . "_macros{\$word} = \$macro";
}
close(TABLE);
}
}
# Collect names of various kinds of files in the package.
# Called by &find on each file.
sub wanted
{
if (/^.*\.[chlymC]$/ || /^.*\.cc$/) {
$name =~ s?^\./??; push(@cfiles, $name);
}
elsif (/^[Mm]akefile$/ || /^[Mm]akefile\.in$/ || /^GNUmakefile$/) {
$name =~ s?^\./??; push(@makefiles, $name);
}
elsif (/^.*\.sh$/) {
$name =~ s?^\./??; push(@shfiles, $name);
}
}
# Read through the files and collect lists of tokens in them
# that might create nonportabilities.
sub scan_files
{
$initfile = $cfiles[0]; # Pick one at random.
if ($verbose) {
print "cfiles:", join(" ", @cfiles), "\n";
print "makefiles:", join(" ", @makefiles), "\n";
print "shfiles:", join(" ", @shfiles), "\n";
}
foreach $file (@cfiles) {
$programs{"cc"}++;
&scan_c_file($file);
}
foreach $file (@makefiles) {
&scan_makefile($file);
}
foreach $file (@shfiles) {
&scan_sh_file($file);
}
}
sub scan_c_file
{
local($file) = @_;
local($in_comment) = 0; # Nonzero if in a multiline comment.
open(CFILE, "<$file") || die "$me: cannot open $file: $!\n";
while (<CFILE>) {
# Strip out comments, approximately.
# Ending on this line.
if ($in_comment && m,\*/,) {
s,.*\*/,,;
$in_comment = 0;
}
# All on one line.
s,/\*.*\*/,,g;
# Starting on this line.
if (m,/\*,) {
$in_comment = 1;
}
# Continuing on this line.
next if $in_comment;
# Preprocessor directives.
if (/^\s*\#\s*include\s*<([^>]*)>/) {
$headers{$1}++;
}
# Ignore other preprocessor directives.
next if /^\s*\#/;
# Remove string and character constants.
s,\"[^\"]*\",,g;
s,\'[^\']*\',,g;
# Tokens in the code.
# Maybe we should ignore function definitions (in column 0)?
while (s/\W([a-zA-Z_]\w*)\s*\(/ /) {
$functions{$1}++ if !defined($c_keywords{$1});
}
while (s/\W([a-zA-Z_]\w*)\W/ /) {
$identifiers{$1}++ if !defined($c_keywords{$1});
}
}
close(CFILE);
if ($verbose) {
local($word);
print "\n$file functions:\n";
foreach $word (sort keys %functions) {
print "$word $functions{$word}\n";
}
print "\n$file identifiers:\n";
foreach $word (sort keys %identifiers) {
print "$word $identifiers{$word}\n";
}
print "\n$file headers:\n";
foreach $word (sort keys %headers) {
print "$word $headers{$word}\n";
}
}
}
sub scan_makefile
{
local($file) = @_;
open(MFILE, "<$file") || die "$me: cannot open $file: $!\n";
while (<MFILE>) {
# Strip out comments and variable references.
s/#.*//;
s/\$\([^\)]*\)//g;
s/\${[^\}]*}//g;
s/@[^@]*@//g;
# Variable assignments.
while (s/\W([a-zA-Z_]\w*)\s*=/ /) {
$makevars{$1}++;
}
# Libraries.
while (s/\W-l([a-zA-Z_]\w*)\W/ /) {
$libraries{$1}++;
}
# Tokens in the code.
while (s/\W([a-zA-Z_]\w*)\W/ /) {
$programs{$1}++;
}
}
close(MFILE);
if ($verbose) {
local($word);
print "\n$file makevars:\n";
foreach $word (sort keys %makevars) {
print "$word $makevars{$word}\n";
}
print "\n$file libraries:\n";
foreach $word (sort keys %libraries) {
print "$word $libraries{$word}\n";
}
print "\n$file programs:\n";
foreach $word (sort keys %programs) {
print "$word $programs{$word}\n";
}
}
}
sub scan_sh_file
{
local($file) = @_;
open(MFILE, "<$file") || die "$me: cannot open $file: $!\n";
while (<MFILE>) {
# Strip out comments and variable references.
s/#.*//;
s/\${[^\}]*}//g;
s/@[^@]*@//g;
# Tokens in the code.
while (s/\W([a-zA-Z_]\w*)\W/ /) {
$programs{$1}++;
}
}
close(MFILE);
if ($verbose) {
local($word);
print "\n$file programs:\n";
foreach $word (sort keys %programs) {
print "$word $programs{$word}\n";
}
}
}
# Print a configure.in.
sub output
{
local (%unique_makefiles);
print CONF "# Process this file with autoconf to produce a configure script.\n";
print CONF "AC_INIT($initfile)\n";
&output_programs;
&output_headers;
&output_identifiers;
&output_functions;
# Change DIR/Makefile.in to DIR/Makefile.
foreach $_ (@makefiles) {
s/\.in$//;
$unique_makefiles{$_}++;
}
print CONF "\nAC_OUTPUT([", join("\n ", keys(%unique_makefiles)), "])\n";
close CONF;
}
# Print Autoconf macro $1 if it's not undef and hasn't been printed already.
sub print_unique
{
local($macro) = @_;
if (defined($macro) && !defined($printed{$macro})) {
print CONF "$macro\n";
$printed{$macro} = 1;
}
}
sub output_programs
{
local ($word);
print CONF "\n# Checks for programs.\n";
foreach $word (sort keys %programs) {
&print_unique($programs_macros{$word});
}
foreach $word (sort keys %makevars) {
&print_unique($makevars_macros{$word});
}
print CONF "\n# Checks for libraries.\n";
foreach $word (sort keys %libraries) {
print CONF "# FIXME: Replace `main' with a function in `-l$word':\n";
print CONF "AC_CHECK_LIB([$word], [main])\n";
}
}
sub output_headers
{
local ($word);
print CONF "\n# Checks for header files.\n";
foreach $word (sort keys %headers) {
if (defined($headers_macros{$word}) &&
$headers_macros{$word} eq 'AC_CHECK_HEADERS') {
push(@have_headers, $word);
} else {
&print_unique($headers_macros{$word});
}
}
print CONF "AC_CHECK_HEADERS([" . join(' ', sort(@have_headers)) . "])\n"
if defined(@have_headers);
}
sub output_identifiers
{
local ($word);
print CONF "\n# Checks for typedefs, structures, and compiler characteristics.\n";
foreach $word (sort keys %identifiers) {
if (defined ($identifiers_macros{$word}) &&
$identifiers_macros{$word} eq 'AC_CHECK_TYPES') {
push (@have_types, $word);
} else {
&print_unique ($identifiers_macros{$word});
}
}
print CONF "AC_CHECK_TYPES([" . join(', ', sort(@have_types)) . "])\n"
if defined (@have_types);
}
sub output_functions
{
local ($word);
print CONF "\n# Checks for library functions.\n";
foreach $word (sort keys %functions) {
if (defined($functions_macros{$word}) &&
$functions_macros{$word} eq 'AC_CHECK_FUNCS') {
push(@have_funcs, $word);
} else {
&print_unique($functions_macros{$word});
}
}
print CONF "AC_CHECK_FUNCS([" . join(' ', sort(@have_funcs)) . "])\n"
if defined(@have_funcs);
}