#!./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 # # # from the contents of the static files # # Porting/Glossary # myconfig.SH # # and from the contents of the Configure-generated file # # config.sh # # # 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 <; 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, 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 hv_func.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 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); 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 /$1\n /gx; # allowed opts as well as specifies default and initial values my %Allowed_Opts = ( 'glossary' => 1, # --no-glossary - no glossary file inclusion, # for compactness 'chdir' => '', # --chdir=dir - change directory before writing files ); sub opts { # user specified options my %given_opts = ( # --opt=smth (map {/^--([\-_\w]+)=(.*)$/} @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'; $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 $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', $], $export_funcs; # This file was created by configpm when Perl was built. Any changes # made to this file will be lost the next time perl is built. # for a description of the variables, please have a look at the # Glossary file, as written in the Porting folder, or use the url: # http://perl5.git.perl.org/perl.git/blob/HEAD:/Porting/Glossary package Config; use strict; use warnings; use vars '%%Config', '$VERSION'; $VERSION = "%s"; # 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 "$0: Perl lib version (%s) doesn't match executable '$^X' version ($])" unless $^V; $^V eq %s or die sprintf "%%s: Perl lib version (%s) doesn't match executable '$^X' version (%%vd)", $0, $^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: $!"; while () { next if m:^#!/bin/sh:; # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure. s/^(\w+)=(true|\d+)\s*$/$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 ' delimited. $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 my $osname = fetch_string({}, 'osname'); my $from = $osname eq 'VMS' ? 'PERLSHR image' : 'binary (from libperl)'; my $env_cygwin = $osname eq 'cygwin' ? 'push @env, "CYGWIN=\"$ENV{CYGWIN}\"" if $ENV{CYGWIN};' . "\n" : ""; $heavy_txt .= sprintf <<'ENDOFBEG', $osname, $osname, $from, $osname, $env_cygwin; # This file was created by configpm when Perl was built. Any changes # made to this file will be lost the next time perl is built. package Config; use strict; use warnings; use vars '%%Config'; sub bincompat_options { return split ' ', (Internals::V())[0]; } sub non_bincompat_options { return split ' ', (Internals::V())[1]; } sub compile_date { return (Internals::V())[2] } sub local_patches { my (undef, undef, undef, @patches) = Internals::V(); return @patches; } sub _V { die "Perl lib was built for '%s' but is being run on '$^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"; 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,") && !/^Summary of/; do { $heavy_txt .= $_ } until !defined($_ = ) || /^\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"; } if (open(my $fh, "cflags")) { my $ccwarnflags; my $ccstdflags; while (<$fh>) { if (/^warn="(.+)"$/) { $ccwarnflags = $1; } elsif (/^stdflags="(.+)"$/) { $ccstdflags = $1; } } if (defined $ccwarnflags) { $heavy_txt .= "ccwarnflags='$ccwarnflags'\n"; } if (defined $ccstdflags) { $heavy_txt .= "ccstdflags='$ccstdflags'\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 .= < ? 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 program at Perl build time (over 900 values). Shell variables from the F 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 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. =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 $regex. =item config_vars(@names) Prints to STDOUT the values of the named configuration variable. Each is printed on a separate line in the form: name='value'; Names which are unknown are output as C. See also C<-V:name> in L. =item bincompat_options() Returns a list of C pre-processor options used when compiling this F binary, which affect its binary compatibility with extensions. C and C are shown together in the output of C as I. =item non_bincompat_options() Returns a list of C pre-processor options used when compiling this F binary, which do not affect binary compatibility with extensions. =item compile_date() Returns the compile date (as a string), equivalent to what is shown by C =item local_patches() Returns a list of the names of locally applied patches, equivalent to what is shown by C. =item header_files() Returns a list of the header files that should be used as dependencies for XS code, for this version of Perl on this platform. =back =head1 EXAMPLE Here's a more sophisticated example of using %Config: use Config; use strict; my %sig_num; my @sig_name; unless($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 variables are determined by the C script on platforms supported by it (which is most UNIX platforms). Some platforms have custom-made C 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; $/ = ''; my $errors= 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 < new paragraph s/^(? text s{([\'\"])(?=[^\'\"\s]*[./][^\'\"\s]*\1)([^\'\"\s]+)\1}(F<$2>)g; # '.o' s{([\'\"])([^\'\"\s]+)\1}(C<$2>)g; # "date" command s{\'([A-Za-z_\- *=/]+)\'}(C<$1>)g; # 'ln -s' s{ (?)xg; # /usr/local s/((?<=\s)~\w*)/F<$1>/g; # ~name s/(?/g; # UNISTD s/(? macro/g; # FILE_cnt macro s/n[\0]t/n't/g; # undo can't, won't damage } if ($Opts{glossary}) { ; # Skip the "DO NOT EDIT" ; # Skip the preamble while () { process; print CONFIG_POD; } if ($errors) { die "Errors encountered while processing $Glossary. ", "Header lines are expected to be of the form:\n", "NAME (CLASS):\n", "Maybe there is a malformed header?\n", ; } } print CONFIG_POD <<'ENDOFTAIL'; =back =head1 GIT DATA Information on the git commit from which the current perl binary was compiled can be found in the variable C<$Config::Git_Data>. The variable is a structured string that looks something like this: git_commit_id='ea0c2dbd5f5ac6845ecc7ec6696415bf8e27bd52' git_describe='GitLive-blead-1076-gea0c2db' git_branch='smartmatch' git_uncommitted_changes='' git_commit_id_title='Commit id:' git_commit_date='2009-05-09 17:47:31 +0200' Its format is not guaranteed not to change over time. =head1 NOTE This module contains a good example of how to use tie to implement a cache and an example of how to make a tied variable readonly to those outside of it. =cut ENDOFTAIL close(GLOS) if $Opts{glossary}; close(CONFIG_POD); print "written $Config_POD\n"; my $orig_config_txt = ""; my $orig_heavy_txt = ""; { local $/; my $fh; $orig_config_txt = <$fh> if open $fh, "<", $Config_PM; $orig_heavy_txt = <$fh> if open $fh, "<", $Config_heavy; } if ($orig_config_txt ne $config_txt or $orig_heavy_txt ne $heavy_txt) { open CONFIG, ">", $Config_PM or die "Can't open $Config_PM: $!\n"; open CONFIG_HEAVY, ">", $Config_heavy or die "Can't open $Config_heavy: $!\n"; print CONFIG $config_txt; print CONFIG_HEAVY $heavy_txt; close(CONFIG_HEAVY); close(CONFIG); print "updated $Config_PM\n"; print "updated $Config_heavy\n"; } # Now do some simple tests on the Config.pm file we have created unshift(@INC,'lib'); require $Config_PM; require $Config_heavy; import Config; die "$0: $Config_PM not valid" unless $Config{'PERL_CONFIG_SH'} eq 'true'; die "$0: error processing $Config_PM" if defined($Config{'an impossible name'}) or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache ; die "$0: error processing $Config_PM" if eval '$Config{"cc"} = 1' or eval 'delete $Config{"cc"}' ; exit 0; # Popularity of various entries in %Config, based on a large build and test # run of code in the Fotango build system: __DATA__ path_sep: 8490 d_readlink: 7101 d_symlink: 7101 archlibexp: 4318 sitearchexp: 4305 sitelibexp: 4305 privlibexp: 4163 ldlibpthname: 4041 libpth: 2134 archname: 1591 exe_ext: 1256 scriptdir: 1155 version: 1116 useithreads: 1002 osvers: 982 osname: 851 inc_version_list: 783 dont_use_nlink: 779 intsize: 759 usevendorprefix: 642 dlsrc: 624 cc: 541 lib_ext: 520 so: 512 ld: 501 ccdlflags: 500 ldflags: 495 obj_ext: 495 cccdlflags: 493 lddlflags: 493 ar: 492 dlext: 492 libc: 492 ranlib: 492 full_ar: 491 vendorarchexp: 491 vendorlibexp: 491 installman1dir: 489 installman3dir: 489 installsitebin: 489 installsiteman1dir: 489 installsiteman3dir: 489 installvendorman1dir: 489 installvendorman3dir: 489 d_flexfnam: 474 eunicefix: 360 d_link: 347 installsitearch: 344 installscript: 341 installprivlib: 337 binexp: 336 installarchlib: 336 installprefixexp: 336 installsitelib: 336 installstyle: 336 installvendorarch: 336 installvendorbin: 336 installvendorlib: 336 man1ext: 336 man3ext: 336 sh: 336 siteprefixexp: 336 installbin: 335 usedl: 332 ccflags: 285 startperl: 232 optimize: 231 usemymalloc: 229 cpprun: 228 sharpbang: 228 perllibs: 225 usesfio: 224 usethreads: 220 perlpath: 218 extensions: 217 usesocks: 208 shellflags: 198 make: 191 d_pwage: 189 d_pwchange: 189 d_pwclass: 189 d_pwcomment: 189 d_pwexpire: 189 d_pwgecos: 189 d_pwpasswd: 189 d_pwquota: 189 gccversion: 189 libs: 186 useshrplib: 186 cppflags: 185 ptrsize: 185 shrpenv: 185 static_ext: 185 use5005threads: 185 uselargefiles: 185 alignbytes: 184 byteorder: 184 ccversion: 184 config_args: 184 cppminus: 184