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Edit File: autoscan
#! /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: