forked from schacon/perl
/
configpm
executable file
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/
configpm
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#!./miniperl -w
#
# configpm
#
# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
# 2002, 2003, 2004, 2005, 2006, 2007 Larry Wall and others.
#
#
# Regenerate the files
#
# lib/Config.pm
# lib/Config_heavy.pl
# lib/Config.pod
# lib/Cross.pm (optionally)
#
#
# from the contents of the static files
#
# Porting/Glossary
# myconfig.SH
#
# and from the contents of the Configure-generated file
#
# config.sh
#
# Note that output directory is xlib/[cross-name]/ for cross-compiling
#
# It will only update Config.pm and Config_heavy.pl if the contents of
# either file would be different. Note that *both* files are updated in
# this case, since for example an extension makefile that has a dependency
# on Config.pm should trigger even if only Config_heavy.pl has changed.
sub usage { die <<EOF }
usage: $0 [ options ]
--cross=PLATFORM cross-compile for a different platform
--no-glossary don't include Porting/Glossary in lib/Config.pod
--chdir=dir change directory before writing files
EOF
use strict;
use vars qw(%Config $Config_SH_expanded);
my $how_many_common = 22;
# commonly used names to precache (and hence lookup fastest)
my %Common;
while ($how_many_common--) {
$_ = <DATA>;
chomp;
/^(\S+):\s*(\d+)$/ or die "Malformed line '$_'";
$Common{$1} = $1;
}
# Post 37589e1eefb1bd62 DynaLoader defaults to reading these at runtime.
# Ideally we're redo the data below, but Fotango's build system made it
# wonderfully easy to instrument, and no longer exists.
$Common{$_} = $_ foreach qw(dlext so);
# names of things which may need to have slashes changed to double-colons
my %Extensions = map {($_,$_)}
qw(dynamic_ext static_ext extensions known_extensions);
# The plan is that this information is used by ExtUtils::MakeMaker to generate
# Makefile dependencies, rather than hardcoding a list, which has become out
# of date. However, currently, MM_Unix.pm and MM_VMS.pm have *different* lists,
# *and* descrip_mms.template doesn't actually install all the headers.
# The "Unix" list seems to (attempt to) avoid the generated headers, which I'm
# not sure is the right thing to do. Also, not certain whether it would be
# easier to parse MANIFEST to get these (adding config.h, and potentially
# removing others), but for now, stick to a hard coded list.
# Could use a map to add ".h", but I suspect that it's easier to use literals,
# so that anyone using grep will find them
# This is the list from MM_VMS, plus pad.h, parser.h, perlsfio.h utf8.h
# which it installs. It *doesn't* install perliol.h - FIXME.
my @header_files = qw(EXTERN.h INTERN.h XSUB.h av.h config.h cop.h cv.h
embed.h embedvar.h form.h gv.h handy.h hv.h intrpvar.h
iperlsys.h keywords.h mg.h nostdio.h op.h opcode.h
pad.h parser.h patchlevel.h perl.h perlio.h perlsdio.h
perlsfio.h perlvars.h perly.h pp.h pp_proto.h proto.h
regcomp.h regexp.h regnodes.h scope.h sv.h thread.h utf8.h
util.h);
# No point in adding fakethr.h, as it no longer works
push @header_files,
$^O eq 'VMS' ? 'vmsish.h' : qw(dosish.h perliol.h time64.h unixish.h);
my $header_files = ' return qw(' . join(' ', sort @header_files) . ');';
$header_files =~ s/(?=.{64}) # If line is still overlength
(.{1,64})\ # Split at the last convenient space
/$1\n /gx;
# allowed opts as well as specifies default and initial values
my %Allowed_Opts = (
'cross' => '', # --cross=PLATFORM - crosscompiling for PLATFORM
'glossary' => 1, # --no-glossary - no glossary file inclusion,
# for compactness
'chdir' => '', # --chdir=dir - change directory before writing files
);
sub opts {
# user specified options
my %given_opts = (
# --opt=smth
(map {/^--([\-_\w]+)=(.*)$/} @ARGV),
# --opt --no-opt --noopt
(map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV),
);
my %opts = (%Allowed_Opts, %given_opts);
for my $opt (grep {!exists $Allowed_Opts{$_}} keys %given_opts) {
warn "option '$opt' is not recognized";
usage;
}
@ARGV = grep {!/^--/} @ARGV;
return %opts;
}
my %Opts = opts();
if ($Opts{chdir}) {
chdir $Opts{chdir} or die "$0: could not chdir $Opts{chdir}: $!"
}
my ($Config_SH, $Config_PM, $Config_heavy, $Config_POD);
my $Glossary = 'Porting/Glossary';
if ($Opts{cross}) {
# creating cross-platform config file
mkdir "xlib";
mkdir "xlib/$Opts{cross}";
$Config_PM = "xlib/$Opts{cross}/Config.pm";
$Config_POD = "xlib/$Opts{cross}/Config.pod";
$Config_SH = "Cross/config-$Opts{cross}.sh";
}
else {
$Config_PM = "lib/Config.pm";
$Config_POD = "lib/Config.pod";
$Config_SH = "config.sh";
}
($Config_heavy = $Config_PM) =~ s/\.pm$/_heavy.pl/;
die "Can't automatically determine name for Config_heavy.pl from '$Config_PM'"
if $Config_heavy eq $Config_PM;
my $config_txt;
my $heavy_txt;
my $from = $^O eq 'VMS' ? 'PERLSHR image' : 'binary (from libperl)';
my $env_cygwin = $^O eq 'cygwin'
? 'push @env, "CYGWIN=\"$ENV{CYGWIN}\"" if $ENV{CYGWIN};' . "\n" : "";
$heavy_txt .= sprintf <<'ENDOFBEG', $^O, $^O, $from, $^O, $env_cygwin;
# This file was created by configpm when Perl was built. Any changes
# made to this file will be lost the next time perl is built.
package Config;
use strict;
use warnings;
use vars '%%Config';
sub bincompat_options {
return split ' ', (Internals::V())[0];
}
sub non_bincompat_options {
return split ' ', (Internals::V())[1];
}
sub compile_date {
return (Internals::V())[2]
}
sub local_patches {
my (undef, undef, undef, @patches) = Internals::V();
return @patches;
}
sub _V {
die "Perl lib was built for '%s' but is being run on '$^O'"
unless "%s" eq $^O;
my ($bincompat, $non_bincompat, $date, @patches) = Internals::V();
my $opts = join ' ', sort split ' ', "$bincompat $non_bincompat";
# wrap at 76 columns.
$opts =~ s/(?=.{53})(.{1,53}) /$1\n /mg;
print Config::myconfig();
print "\nCharacteristics of this %s: \n";
print " Compile-time options: $opts\n";
if (@patches) {
print " Locally applied patches:\n";
print "\t$_\n" foreach @patches;
}
print " Built under %s\n";
print " $date\n" if defined $date;
my @env = map { "$_=\"$ENV{$_}\"" } sort grep {/^PERL/} keys %%ENV;
%s
if (@env) {
print " \%%ENV:\n";
print " $_\n" foreach @env;
}
print " \@INC:\n";
print " $_\n" foreach @INC;
}
sub header_files {
ENDOFBEG
$heavy_txt .= $header_files . "\n}\n\n";
my $export_funcs = <<'EOT';
my %Export_Cache = (myconfig => 1, config_sh => 1, config_vars => 1,
config_re => 1, compile_date => 1, local_patches => 1,
bincompat_options => 1, non_bincompat_options => 1,
header_files => 1);
EOT
my %export_ok = eval $export_funcs or die;
$config_txt .= sprintf << 'EOT', $export_funcs;
# This file was created by configpm when Perl was built. Any changes
# made to this file will be lost the next time perl is built.
# for a description of the variables, please have a look at the
# Glossary file, as written in the Porting folder, or use the url:
# http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
package Config;
use strict;
use warnings;
use vars '%%Config';
# Skip @Config::EXPORT because it only contains %%Config, which we special
# case below as it's not a function. @Config::EXPORT won't change in the
# lifetime of Perl 5.
%s
@Config::EXPORT = qw(%%Config);
@Config::EXPORT_OK = keys %%Export_Cache;
# Need to stub all the functions to make code such as print Config::config_sh
# keep working
EOT
$config_txt .= "sub $_;\n" foreach sort keys %export_ok;
my $myver = sprintf "%vd", $^V;
$config_txt .= sprintf <<'ENDOFBEG', ($myver) x 3;
# Define our own import method to avoid pulling in the full Exporter:
sub import {
shift;
@_ = @Config::EXPORT unless @_;
my @funcs = grep $_ ne '%%Config', @_;
my $export_Config = @funcs < @_ ? 1 : 0;
no strict 'refs';
my $callpkg = caller(0);
foreach my $func (@funcs) {
die qq{"$func" is not exported by the Config module\n}
unless $Export_Cache{$func};
*{$callpkg.'::'.$func} = \&{$func};
}
*{"$callpkg\::Config"} = \%%Config if $export_Config;
return;
}
die "Perl lib version (%s) doesn't match executable '$0' version ($])"
unless $^V;
$^V eq %s
or die "Perl lib version (%s) doesn't match executable '$0' version (" .
sprintf("v%%vd",$^V) . ")";
ENDOFBEG
my @non_v = ();
my @v_others = ();
my $in_v = 0;
my %Data = ();
my $quote;
my %seen_quotes;
{
my ($name, $val);
open(CONFIG_SH, $Config_SH) || die "Can't open $Config_SH: $!";
while (<CONFIG_SH>) {
next if m:^#!/bin/sh:;
# Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure.
s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/;
my($k, $v) = ($1, $2);
# grandfather PATCHLEVEL and SUBVERSION and CONFIG
if ($k) {
if ($k eq 'PERL_VERSION') {
push @v_others, "PATCHLEVEL='$v'\n";
}
elsif ($k eq 'PERL_SUBVERSION') {
push @v_others, "SUBVERSION='$v'\n";
}
elsif ($k eq 'PERL_CONFIG_SH') {
push @v_others, "CONFIG='$v'\n";
}
}
# We can delimit things in config.sh with either ' or ".
unless ($in_v or m/^(\w+)=(['"])(.*\n)/){
push(@non_v, "#$_"); # not a name='value' line
next;
}
if ($in_v) {
$val .= $_;
}
else {
$quote = $2;
($name,$val) = ($1,$3);
}
$in_v = $val !~ /$quote\n/;
next if $in_v;
s,/,::,g if $Extensions{$name};
$val =~ s/$quote\n?\z//;
my $line = "$name=$quote$val$quote\n";
push(@v_others, $line);
$seen_quotes{$quote}++;
}
close CONFIG_SH;
}
# This is somewhat grim, but I want the code for parsing config.sh here and
# now so that I can expand $Config{ivsize} and $Config{ivtype}
my $fetch_string = <<'EOT';
# Search for it in the big string
sub fetch_string {
my($self, $key) = @_;
EOT
if ($seen_quotes{'"'}) {
# We need the full ' and " code
$fetch_string .= <<'EOT';
return undef unless my ($quote_type, $value) = $Config_SH_expanded =~ /\n$key=(['"])(.*?)\1\n/s;
# If we had a double-quote, we'd better eval it so escape
# sequences and such can be interpolated. Since the incoming
# value is supposed to follow shell rules and not perl rules,
# we escape any perl variable markers
# Historically, since " 'support' was added in change 1409, the
# interpolation was done before the undef. Stick to this arguably buggy
# behaviour as we're refactoring.
if ($quote_type eq '"') {
$value =~ s/\$/\\\$/g;
$value =~ s/\@/\\\@/g;
eval "\$value = \"$value\"";
}
# So we can say "if $Config{'foo'}".
$self->{$key} = $value eq 'undef' ? undef : $value; # cache it
}
EOT
} else {
# We only have ' delimted.
$fetch_string .= <<'EOT';
return undef unless $Config_SH_expanded =~ /\n$key=\'(.*?)\'\n/s;
# So we can say "if $Config{'foo'}".
$self->{$key} = $1 eq 'undef' ? undef : $1;
}
EOT
}
eval $fetch_string;
die if $@;
# Calculation for the keys for byteorder
# This is somewhat grim, but I need to run fetch_string here.
our $Config_SH_expanded = join "\n", '', @v_others;
my $t = fetch_string ({}, 'ivtype');
my $s = fetch_string ({}, 'ivsize');
# byteorder does exist on its own but we overlay a virtual
# dynamically recomputed value.
# However, ivtype and ivsize will not vary for sane fat binaries
my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I';
my $byteorder_code;
if ($s == 4 || $s == 8) {
my $list = join ',', reverse(1..$s-1);
my $format = 'a'x$s;
$byteorder_code = <<"EOT";
my \$i = ord($s);
foreach my \$c ($list) { \$i <<= 8; \$i |= ord(\$c); }
our \$byteorder = join('', unpack('$format', pack('$f', \$i)));
EOT
} else {
$byteorder_code = "our \$byteorder = '?'x$s;\n";
}
my @need_relocation;
if (fetch_string({},'userelocatableinc')) {
foreach my $what (qw(prefixexp
archlibexp
html1direxp
html3direxp
man1direxp
man3direxp
privlibexp
scriptdirexp
sitearchexp
sitebinexp
sitehtml1direxp
sitehtml3direxp
sitelibexp
siteman1direxp
siteman3direxp
sitescriptexp
vendorarchexp
vendorbinexp
vendorhtml1direxp
vendorhtml3direxp
vendorlibexp
vendorman1direxp
vendorman3direxp
vendorscriptexp
siteprefixexp
sitelib_stem
vendorlib_stem
installarchlib
installhtml1dir
installhtml3dir
installman1dir
installman3dir
installprefix
installprefixexp
installprivlib
installscript
installsitearch
installsitebin
installsitehtml1dir
installsitehtml3dir
installsitelib
installsiteman1dir
installsiteman3dir
installsitescript
installvendorarch
installvendorbin
installvendorhtml1dir
installvendorhtml3dir
installvendorlib
installvendorman1dir
installvendorman3dir
installvendorscript
)) {
push @need_relocation, $what if fetch_string({}, $what) =~ m!^\.\.\./!;
}
}
my %need_relocation;
@need_relocation{@need_relocation} = @need_relocation;
# This can have .../ anywhere:
if (fetch_string({}, 'otherlibdirs') =~ m!\.\.\./!) {
$need_relocation{otherlibdirs} = 'otherlibdirs';
}
my $relocation_code = <<'EOT';
sub relocate_inc {
my $libdir = shift;
return $libdir unless $libdir =~ s!^\.\.\./!!;
my $prefix = $^X;
if ($prefix =~ s!/[^/]*$!!) {
while ($libdir =~ m!^\.\./!) {
# Loop while $libdir starts "../" and $prefix still has a trailing
# directory
last unless $prefix =~ s!/([^/]+)$!!;
# but bail out if the directory we picked off the end of $prefix is .
# or ..
if ($1 eq '.' or $1 eq '..') {
# Undo! This should be rare, hence code it this way rather than a
# check each time before the s!!! above.
$prefix = "$prefix/$1";
last;
}
# Remove that leading ../ and loop again
substr ($libdir, 0, 3, '');
}
$libdir = "$prefix/$libdir";
}
$libdir;
}
EOT
if (%need_relocation) {
my $relocations_in_common;
# otherlibdirs only features in the hash
foreach (keys %need_relocation) {
$relocations_in_common++ if $Common{$_};
}
if ($relocations_in_common) {
$config_txt .= $relocation_code;
} else {
$heavy_txt .= $relocation_code;
}
}
$heavy_txt .= join('', @non_v) . "\n";
# copy config summary format from the myconfig.SH script
$heavy_txt .= "our \$summary = <<'!END!';\n";
open(MYCONFIG,"<myconfig.SH") || die "open myconfig.SH failed: $!";
1 while defined($_ = <MYCONFIG>) && !/^Summary of/;
do { $heavy_txt .= $_ } until !defined($_ = <MYCONFIG>) || /^\s*$/;
close(MYCONFIG);
$heavy_txt .= "\n!END!\n" . <<'EOT';
my $summary_expanded;
sub myconfig {
return $summary_expanded if $summary_expanded;
($summary_expanded = $summary) =~ s{\$(\w+)}
{
my $c;
if ($1 eq 'git_ancestor_line') {
if ($Config::Config{git_ancestor}) {
$c= "\n Ancestor: $Config::Config{git_ancestor}";
} else {
$c= "";
}
} else {
$c = $Config::Config{$1};
}
defined($c) ? $c : 'undef'
}ge;
$summary_expanded;
}
local *_ = \my $a;
$_ = <<'!END!';
EOT
$heavy_txt .= join('', sort @v_others) . "!END!\n";
# Only need the dynamic byteorder code in Config.pm if 'byteorder' is one of
# the precached keys
if ($Common{byteorder}) {
$config_txt .= $byteorder_code;
} else {
$heavy_txt .= $byteorder_code;
}
if (@need_relocation) {
$heavy_txt .= 'foreach my $what (qw(' . join (' ', @need_relocation) .
")) {\n" . <<'EOT';
s/^($what=)(['"])(.*?)\2/$1 . $2 . relocate_inc($3) . $2/me;
}
EOT
# Currently it only makes sense to do the ... relocation on Unix, so there's
# no need to emulate the "which separator for this platform" logic in perl.c -
# ':' will always be applicable
if ($need_relocation{otherlibdirs}) {
$heavy_txt .= << 'EOT';
s{^(otherlibdirs=)(['"])(.*?)\2}
{$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me;
EOT
}
}
$heavy_txt .= <<'EOT';
s/(byteorder=)(['"]).*?\2/$1$2$Config::byteorder$2/m;
my $config_sh_len = length $_;
our $Config_SH_expanded = "\n$_" . << 'EOVIRTUAL';
EOT
foreach my $prefix (qw(ccflags ldflags)) {
my $value = fetch_string ({}, $prefix);
my $withlargefiles = fetch_string ({}, $prefix . "_uselargefiles");
if (defined $withlargefiles) {
$value =~ s/\Q$withlargefiles\E\b//;
$heavy_txt .= "${prefix}_nolargefiles='$value'\n";
}
}
foreach my $prefix (qw(libs libswanted)) {
my $value = fetch_string ({}, $prefix);
my $withlf = fetch_string ({}, 'libswanted_uselargefiles');
next unless defined $withlf;
my @lflibswanted
= split(' ', fetch_string ({}, 'libswanted_uselargefiles'));
if (@lflibswanted) {
my %lflibswanted;
@lflibswanted{@lflibswanted} = ();
if ($prefix eq 'libs') {
my @libs = grep { /^-l(.+)/ &&
not exists $lflibswanted{$1} }
split(' ', fetch_string ({}, 'libs'));
$value = join(' ', @libs);
} else {
my @libswanted = grep { not exists $lflibswanted{$_} }
split(' ', fetch_string ({}, 'libswanted'));
$value = join(' ', @libswanted);
}
}
$heavy_txt .= "${prefix}_nolargefiles='$value'\n";
}
$heavy_txt .= "EOVIRTUAL\n";
$heavy_txt .= <<'ENDOFGIT';
eval {
# do not have hairy conniptions if this isnt available
require 'Config_git.pl';
$Config_SH_expanded .= $Config::Git_Data;
1;
} or warn "Warning: failed to load Config_git.pl, something strange about this perl...\n";
ENDOFGIT
$heavy_txt .= $fetch_string;
$config_txt .= <<'ENDOFEND';
sub FETCH {
my($self, $key) = @_;
# check for cached value (which may be undef so we use exists not defined)
return exists $self->{$key} ? $self->{$key} : $self->fetch_string($key);
}
ENDOFEND
$heavy_txt .= <<'ENDOFEND';
my $prevpos = 0;
sub FIRSTKEY {
$prevpos = 0;
substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 );
}
sub NEXTKEY {
ENDOFEND
if ($seen_quotes{'"'}) {
$heavy_txt .= <<'ENDOFEND';
# Find out how the current key's quoted so we can skip to its end.
my $quote = substr($Config_SH_expanded,
index($Config_SH_expanded, "=", $prevpos)+1, 1);
my $pos = index($Config_SH_expanded, qq($quote\n), $prevpos) + 2;
ENDOFEND
} else {
# Just ' quotes, so it's much easier.
$heavy_txt .= <<'ENDOFEND';
my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2;
ENDOFEND
}
$heavy_txt .= <<'ENDOFEND';
my $len = index($Config_SH_expanded, "=", $pos) - $pos;
$prevpos = $pos;
$len > 0 ? substr($Config_SH_expanded, $pos, $len) : undef;
}
sub EXISTS {
return 1 if exists($_[0]->{$_[1]});
return(index($Config_SH_expanded, "\n$_[1]='") != -1
ENDOFEND
if ($seen_quotes{'"'}) {
$heavy_txt .= <<'ENDOFEND';
or index($Config_SH_expanded, "\n$_[1]=\"") != -1
ENDOFEND
}
$heavy_txt .= <<'ENDOFEND';
);
}
sub STORE { die "\%Config::Config is read-only\n" }
*DELETE = *CLEAR = \*STORE; # Typeglob aliasing uses less space
sub config_sh {
substr $Config_SH_expanded, 1, $config_sh_len;
}
sub config_re {
my $re = shift;
return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/,
$Config_SH_expanded;
}
sub config_vars {
# implements -V:cfgvar option (see perlrun -V:)
foreach (@_) {
# find optional leading, trailing colons; and query-spec
my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft,
# map colon-flags to print decorations
my $prfx = $notag ? '': "$qry="; # tag-prefix for print
my $lnend = $lncont ? ' ' : ";\n"; # line ending for print
# all config-vars are by definition \w only, any \W means regex
if ($qry =~ /\W/) {
my @matches = config_re($qry);
print map "$_$lnend", @matches ? @matches : "$qry: not found" if !$notag;
print map { s/\w+=//; "$_$lnend" } @matches ? @matches : "$qry: not found" if $notag;
} else {
my $v = (exists $Config::Config{$qry}) ? $Config::Config{$qry}
: 'UNKNOWN';
$v = 'undef' unless defined $v;
print "${prfx}'${v}'$lnend";
}
}
}
# Called by the real AUTOLOAD
sub launcher {
undef &AUTOLOAD;
goto \&$Config::AUTOLOAD;
}
1;
ENDOFEND
if ($^O eq 'os2') {
$config_txt .= <<'ENDOFSET';
my %preconfig;
if ($OS2::is_aout) {
my ($value, $v) = $Config_SH_expanded =~ m/^used_aout='(.*)'\s*$/m;
for (split ' ', $value) {
($v) = $Config_SH_expanded =~ m/^aout_$_='(.*)'\s*$/m;
$preconfig{$_} = $v eq 'undef' ? undef : $v;
}
}
$preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't
sub TIEHASH { bless {%preconfig} }
ENDOFSET
# Extract the name of the DLL from the makefile to avoid duplication
my ($f) = grep -r, qw(GNUMakefile Makefile);
my $dll;
if (open my $fh, '<', $f) {
while (<$fh>) {
$dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/;
}
}
$config_txt .= <<ENDOFSET if $dll;
\$preconfig{dll_name} = '$dll';
ENDOFSET
} else {
$config_txt .= <<'ENDOFSET';
sub TIEHASH {
bless $_[1], $_[0];
}
ENDOFSET
}
foreach my $key (keys %Common) {
my $value = fetch_string ({}, $key);
# Is it safe on the LHS of => ?
my $qkey = $key =~ /^[A-Za-z_][A-Za-z0-9_]*$/ ? $key : "'$key'";
if (defined $value) {
# Quote things for a '' string
$value =~ s!\\!\\\\!g;
$value =~ s!'!\\'!g;
$value = "'$value'";
if ($key eq 'otherlibdirs') {
$value = "join (':', map {relocate_inc(\$_)} split (':', $value))";
} elsif ($need_relocation{$key}) {
$value = "relocate_inc($value)";
}
} else {
$value = "undef";
}
$Common{$key} = "$qkey => $value";
}
if ($Common{byteorder}) {
$Common{byteorder} = 'byteorder => $byteorder';
}
my $fast_config = join '', map { " $_,\n" } sort values %Common;
# Sanity check needed to stop an infinite loop if Config_heavy.pl fails to
# define &launcher for some reason (eg it got truncated)
$config_txt .= sprintf <<'ENDOFTIE', $fast_config;
sub DESTROY { }
sub AUTOLOAD {
require 'Config_heavy.pl';
goto \&launcher unless $Config::AUTOLOAD =~ /launcher$/;
die "&Config::AUTOLOAD failed on $Config::AUTOLOAD";
}
# tie returns the object, so the value returned to require will be true.
tie %%Config, 'Config', {
%s};
ENDOFTIE
open(CONFIG_POD, ">$Config_POD") or die "Can't open $Config_POD: $!";
print CONFIG_POD <<'ENDOFTAIL';
=head1 NAME
Config - access Perl configuration information
=head1 SYNOPSIS
use Config;
if ($Config{usethreads}) {
print "has thread support\n"
}
use Config qw(myconfig config_sh config_vars config_re);
print myconfig();
print config_sh();
print config_re();
config_vars(qw(osname archname));
=head1 DESCRIPTION
The Config module contains all the information that was available to
the C<Configure> program at Perl build time (over 900 values).
Shell variables from the F<config.sh> file (written by Configure) are
stored in the readonly-variable C<%Config>, indexed by their names.
Values stored in config.sh as 'undef' are returned as undefined
values. The perl C<exists> function can be used to check if a
named variable exists.
For a description of the variables, please have a look at the
Glossary file, as written in the Porting folder, or use the url:
http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary
=over 4
=item myconfig()
Returns a textual summary of the major perl configuration values.
See also C<-V> in L<perlrun/Command Switches>.
=item config_sh()
Returns the entire perl configuration information in the form of the
original config.sh shell variable assignment script.
=item config_re($regex)
Like config_sh() but returns, as a list, only the config entries who's
names match the $regex.
=item config_vars(@names)
Prints to STDOUT the values of the named configuration variable. Each is
printed on a separate line in the form:
name='value';
Names which are unknown are output as C<name='UNKNOWN';>.
See also C<-V:name> in L<perlrun/Command Switches>.
=item bincompat_options()
Returns a list of C pre-processor options used when compiling this F<perl>
binary, which affect its binary compatibility with extensions.
C<bincompat_options()> and C<non_bincompat_options()> are shown together in
the output of C<perl -V> as I<Compile-time options>.
=item non_bincompat_options()
Returns a list of C pre-processor options used when compiling this F<perl>
binary, which do not affect binary compatibility with extensions.
=item compile_date()
Returns the compile date (as a string), equivalent to what is shown by
C<perl -V>
=item local_patches()
Returns a list of the names of locally applied patches, equivalent to what
is shown by C<perl -V>.
=item header_files()
Returns a list of the header files that should be used as dependencies for
XS code, for this version of Perl on this platform.
=back
=head1 EXAMPLE
Here's a more sophisticated example of using %Config:
use Config;
use strict;
my %sig_num;
my @sig_name;
unless($Config{sig_name} && $Config{sig_num}) {
die "No sigs?";
} else {
my @names = split ' ', $Config{sig_name};
@sig_num{@names} = split ' ', $Config{sig_num};
foreach (@names) {
$sig_name[$sig_num{$_}] ||= $_;
}
}
print "signal #17 = $sig_name[17]\n";
if ($sig_num{ALRM}) {
print "SIGALRM is $sig_num{ALRM}\n";
}
=head1 WARNING
Because this information is not stored within the perl executable
itself it is possible (but unlikely) that the information does not
relate to the actual perl binary which is being used to access it.
The Config module is installed into the architecture and version
specific library directory ($Config{installarchlib}) and it checks the
perl version number when loaded.
The values stored in config.sh may be either single-quoted or
double-quoted. Double-quoted strings are handy for those cases where you
need to include escape sequences in the strings. To avoid runtime variable
interpolation, any C<$> and C<@> characters are replaced by C<\$> and
C<\@>, respectively. This isn't foolproof, of course, so don't embed C<\$>
or C<\@> in double-quoted strings unless you're willing to deal with the
consequences. (The slashes will end up escaped and the C<$> or C<@> will
trigger variable interpolation)
=head1 GLOSSARY
Most C<Config> variables are determined by the C<Configure> script
on platforms supported by it (which is most UNIX platforms). Some
platforms have custom-made C<Config> variables, and may thus not have
some of the variables described below, or may have extraneous variables
specific to that particular port. See the port specific documentation
in such cases.
=cut
ENDOFTAIL
if ($Opts{glossary}) {
open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!";
}
my %seen = ();
my $text = 0;
$/ = '';
sub process {
if (s/\A(\w*)\s+\(([\w.]+)\):\s*\n(\t?)/=item C<$1>\n\nFrom F<$2>:\n\n/m) {
my $c = substr $1, 0, 1;
unless ($seen{$c}++) {
print CONFIG_POD <<EOF if $text;
=back
=cut
EOF
print CONFIG_POD <<EOF;
=head2 $c