X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/75f926282bd78abe2f394977be7dd4dc52cb21ba..bb275e7208fde6cd3835f1057d07fa69e22b40a4:/configpm diff --git a/configpm b/configpm index acce1e0..874e3f3 100755 --- a/configpm +++ b/configpm @@ -1,121 +1,988 @@ #!./miniperl -w +use strict; +use vars qw(%Config $Config_SH_expanded); -$config_pm = $ARGV[0] || 'lib/Config.pm'; -@ARGV = "./config.sh"; +my $how_many_common = 22; -# list names to put first (and hence lookup fastest) -@fast = qw(osname osvers so libpth archlib - sharpbang startsh shsharp - dynamic_ext static_ext extensions dl_src - sig_name ccflags cppflags intsize); +# commonly used names to precache (and hence lookup fastest) +my %Common; +while ($how_many_common--) { + $_ = ; + chomp; + /^(\S+):\s*(\d+)$/ or die "Malformed line '$_'"; + $Common{$1} = $1; +} + +# names of things which may need to have slashes changed to double-colons +my %Extensions = map {($_,$_)} + qw(dynamic_ext static_ext extensions known_extensions); + +# allowed opts as well as specifies default and initial values +my %Allowed_Opts = ( + 'cross' => '', # --cross=PLATFORM - crosscompiling for PLATFORM + 'glossary' => 1, # --no-glossary - no glossary file inclusion, + # for compactness + 'heavy' => '', # pathname of the Config_heavy.pl file +); + +sub opts { + # user specified options + my %given_opts = ( + # --opt=smth + (map {/^--([\-_\w]+)=(.*)$/} @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) { + die "option '$opt' is not recognized"; + } + @ARGV = grep {!/^--/} @ARGV; + + return %opts; +} + + +my %Opts = opts(); + +my ($Config_PM, $Config_heavy); +my $Glossary = $ARGV[1] || 'Porting/Glossary'; + +if ($Opts{cross}) { + # creating cross-platform config file + mkdir "xlib"; + mkdir "xlib/$Opts{cross}"; + $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm"; +} +else { + $Config_PM = $ARGV[0] || 'lib/Config.pm'; +} +if ($Opts{heavy}) { + $Config_heavy = $Opts{heavy}; +} +else { + ($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 $Config_PM; +} + +open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n"; +open CONFIG_HEAVY, ">$Config_heavy" or die "Can't open $Config_heavy: $!\n"; + +print CONFIG_HEAVY <<'ENDOFBEG'; +# This file was created by configpm when Perl was built. Any changes +# made to this file will be lost the next time perl is built. -open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; -$myver = sprintf("%.3f", $]); -print CONFIG <<"ENDOFBEG"; package Config; -require Exporter; -\@ISA = (Exporter); -\@EXPORT = qw(%Config); +use strict; +# use warnings; Pulls in Carp +# use vars pulls in Carp +ENDOFBEG -\$] == $myver or die sprintf - "Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$]; +my $myver = sprintf "%vd", $^V; +printf CONFIG <<'ENDOFBEG', ($myver) x 3; # 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; Pulls in Carp +# use vars pulls in Carp +@Config::EXPORT = qw(%%Config); +@Config::EXPORT_OK = qw(myconfig config_sh config_vars config_re); + +# Need to stub all the functions to make code such as print Config::config_sh +# keep working + +sub myconfig; +sub config_sh; +sub config_vars; +sub config_re; + +my %%Export_Cache = map {($_ => 1)} (@Config::EXPORT, @Config::EXPORT_OK); + +our %%Config; + +# Define our own import method to avoid pulling in the full Exporter: +sub import { + my $pkg = 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 sprintf qq{"%%s" is not exported by the %%s module\n}, + $func, __PACKAGE__ unless $Export_Cache{$func}; + *{$callpkg.'::'.$func} = \&{$func}; + } + + *{"$callpkg\::Config"} = \%%Config if $export_Config; + return; +} + +die "Perl lib version (%s) doesn't match executable version ($])" + unless $^V; + +$^V eq %s + or die "Perl lib version (%s) doesn't match executable version (" . + sprintf("v%%vd",$^V) . ")"; + ENDOFBEG -@fast{@fast} = @fast; -@non_v=(); -@v_fast=(); -@v_others=(); -while (<>) { +my @non_v = (); +my @v_others = (); +my $in_v = 0; +my %Data = (); + + +my %seen_quotes; +{ + my ($name, $val); + open(CONFIG_SH, 'config.sh') || die "Can't open config.sh: $!"; + while () { next if m:^#!/bin/sh:; - # Catch CONFIG=true and PATCHLEVEL=n line from Configure. - s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; - unless (m/^(\w+)='(.*)'\s*$/){ + + # 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 (!$fast{$1}){ push(@v_others, $_); next; } - push(@v_fast,$_); + my $quote = $2; + if ($in_v) { + $val .= $_; + } + else { + ($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; } -foreach(@non_v){ print CONFIG $_ } +# 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'; + my $quote_type = "'"; + my $marker = "$key="; + + # Check for the common case, ' delimited + my $start = index($Config_SH_expanded, "\n$marker$quote_type"); + # If that failed, check for " delimited + if ($start == -1) { + $quote_type = '"'; + $start = index($Config_SH_expanded, "\n$marker$quote_type"); + } +EOT +} else { + $fetch_string .= <<'EOT'; + # We only have ' delimted. + my $start = index($Config_SH_expanded, "\n$key=\'"); +EOT +} +$fetch_string .= <<'EOT'; + # Start can never be -1 now, as we've rigged the long string we're + # searching with an initial dummy newline. + return undef if $start == -1; + + $start += length($key) + 3; + +EOT +if (!$seen_quotes{'"'}) { + # Don't need the full ' and " code, or the eval expansion. + $fetch_string .= <<'EOT'; + my $value = substr($Config_SH_expanded, $start, + index($Config_SH_expanded, "'\n", $start) + - $start); +EOT +} else { + $fetch_string .= <<'EOT'; + my $value = substr($Config_SH_expanded, $start, + index($Config_SH_expanded, "$quote_type\n", $start) + - $start); + + # If we had a double-quote, we'd better eval it so escape + # sequences and such can be interpolated. Since the incoming + # value is supposed to follow shell rules and not perl rules, + # we escape any perl variable markers + if ($quote_type eq '"') { + $value =~ s/\$/\\\$/g; + $value =~ s/\@/\\\@/g; + eval "\$value = \"$value\""; + } +EOT +} +$fetch_string .= <<'EOT'; + # So we can say "if $Config{'foo'}". + $value = undef if $value eq 'undef'; + $self->{$key} = $value; # cache it +} +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 $list = join ',', reverse(2..$s); + my $format = 'a'x$s; + $byteorder_code = <<"EOT"; + +my \$i = 0; +foreach my \$c ($list) { \$i |= ord(\$c); \$i <<= 8 } +\$i |= ord(1); +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(archlibexp + privlibexp + sitearchexp + sitelibexp + sitelib_stem + vendorarchexp + vendorlibexp + vendorlib_stem)) { + 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) { + print CONFIG $relocation_code; + } else { + print CONFIG_HEAVY $relocation_code; + } +} + +print CONFIG_HEAVY @non_v, "\n"; + +# copy config summary format from the myconfig.SH script +print CONFIG_HEAVY "our \$summary = <<'!END!';\n"; +open(MYCONFIG,") && !/^Summary of/; +do { print CONFIG_HEAVY $_ } until !defined($_ = ) || /^\s*$/; +close(MYCONFIG); + +print CONFIG_HEAVY "\n!END!\n", <<'EOT'; +my $summary_expanded; + +sub myconfig { + return $summary_expanded if $summary_expanded; + ($summary_expanded = $summary) =~ s{\$(\w+)} + { my $c = $Config::Config{$1}; defined($c) ? $c : 'undef' }ge; + $summary_expanded; +} + +local *_ = \my $a; +$_ = <<'!END!'; +EOT + +print CONFIG_HEAVY 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}) { + print CONFIG $byteorder_code; +} else { + print CONFIG_HEAVY $byteorder_code; +} + +if (@need_relocation) { +print CONFIG_HEAVY '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}) { +print CONFIG_HEAVY << 'EOT'; +s{^(otherlibdirs=)(['"])(.*?)\2} + {$1 . $2 . join ':', map {relocate_inc($_)} split ':', $3 . $2}me; +EOT +} +} + +print CONFIG_HEAVY <<'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//; + print CONFIG_HEAVY "${prefix}_nolargefiles='$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')); + $value = join(' ', @libswanted); + } + } + print CONFIG_HEAVY "${prefix}_nolargefiles='$value'\n"; +} -print CONFIG "\n", - "\$config_sh=<<'!END!OF!CONFIG!';\n", - join("", @v_fast, sort @v_others), - "!END!OF!CONFIG!\n\n"; +print CONFIG_HEAVY "EOVIRTUAL\n"; +print CONFIG_HEAVY $fetch_string; print CONFIG <<'ENDOFEND'; -tie %Config, Config; -sub TIEHASH { bless {} } -sub FETCH { - # check for cached value (which maybe undef so we use exists not defined) - return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); - - my($value); # search for the item in the big $config_sh string - return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); - - $value = undef if $value eq 'undef'; # So we can say "if $Config{'foo'}". - $_[0]->{$_[1]} = $value; # cache it - return $value; -} - +sub FETCH { + my($self, $key) = @_; + + # check for cached value (which may be undef so we use exists not defined) + return $self->{$key} if exists $self->{$key}; + + return $self->fetch_string($key); +} +ENDOFEND + +print CONFIG_HEAVY <<'ENDOFEND'; + +my $prevpos = 0; + sub FIRSTKEY { $prevpos = 0; - my $key; - ($key) = $config_sh =~ m/^(.*)=/; - $key; + substr($Config_SH_expanded, 1, index($Config_SH_expanded, '=') - 1 ); } sub NEXTKEY { - my ($pos, $len); - $pos = $prevpos; - $pos = index( $config_sh, "\n", $pos) + 1; +ENDOFEND +if ($seen_quotes{'"'}) { +print CONFIG_HEAVY <<'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. +print CONFIG_HEAVY <<'ENDOFEND'; + my $pos = index($Config_SH_expanded, qq('\n), $prevpos) + 2; +ENDOFEND +} +print CONFIG_HEAVY <<'ENDOFEND'; + my $len = index($Config_SH_expanded, "=", $pos) - $pos; $prevpos = $pos; - $len = index( $config_sh, "=", $pos) - $pos; - $len > 0 ? substr( $config_sh, $pos, $len) : undef; + $len > 0 ? substr($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{'"'}) { +print CONFIG_HEAVY <<'ENDOFEND'; + or index($Config_SH_expanded, "\n$_[1]=\"") != -1 +ENDOFEND } +print CONFIG_HEAVY <<'ENDOFEND'; + ); +} + +sub STORE { die "\%Config::Config is read-only\n" } +*DELETE = \&STORE; +*CLEAR = \&STORE; + -sub EXISTS{ - exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; +sub config_sh { + substr $Config_SH_expanded, 1, $config_sh_len; } -sub readonly { die "\%Config::Config is read-only\n" } +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 = $lncont ? ' ' : ";\n"; # line ending for print -sub STORE { &readonly } -sub DELETE{ &readonly } -sub CLEAR { &readonly } + # all config-vars are by definition \w only, any \W means regex + if ($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') { + print CONFIG <<'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 = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/; + } + } + print CONFIG < ? + 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 infite loop if Config_heavy.pl fails to define +# &launcher for some reason (eg it got truncated) +print CONFIG 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, ">lib/Config.pod") or die "Can't open lib/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. + +=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 $regex. + +=item config_vars(@names) + +Prints to STDOUT the values of the named configuration variable. Each is +printed on a separate line in the form: + + name='value'; + +Names which are unknown are output as C. +See also C<-V:name> in L. + +=back + +=head1 EXAMPLE + +Here's a more sophisticated example of using %Config: + + use Config; + use strict; + + my %sig_num; + my @sig_name; + unless($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. + +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 < 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; + } +} + +print CONFIG_POD <<'ENDOFTAIL'; + +=back + +=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(CONFIG_HEAVY); close(CONFIG); +close(GLOS); +close(CONFIG_POD); + +# Now create Cross.pm if needed +if ($Opts{cross}) { + open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!"; + my $cross = <<'EOS'; +# typical invocation: +# perl -MCross Makefile.PL +# perl -MCross=wince -V:cc +package Cross; + +sub import { + my ($package,$platform) = @_; + unless (defined $platform) { + # if $platform is not specified, then use last one when + # 'configpm; was invoked with --cross option + $platform = '***replace-marker***'; + } + @INC = map {/\blib\b/?(do{local $_=$_;s/\blib\b/xlib\/$platform/;$_},$_):($_)} @INC; + $::Cross::platform = $platform; +} + +1; +EOS + $cross =~ s/\*\*\*replace-marker\*\*\*/$Opts{cross}/g; + print CROSS $cross; + close CROSS; +} # Now do some simple tests on the Config.pm file we have created unshift(@INC,'lib'); -require $config_pm; +unshift(@INC,'xlib/symbian') if $Opts{cross}; +require $Config_PM; +require $Config_heavy; import Config; -die "$0: $config_pm not valid" - unless $Config{'CONFIG'} eq 'true'; +die "$0: $Config_PM not valid" + unless $Config{'PERL_CONFIG_SH'} eq 'true'; -die "$0: error processing $config_pm" +die "$0: error processing $Config_PM" if defined($Config{'an impossible name'}) - or $Config{'CONFIG'} ne 'true' # test cache + or $Config{'PERL_CONFIG_SH'} ne 'true' # test cache ; -die "$0: error processing $config_pm" +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