X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/fec02dd38faf8f83471b031857d89cb76fea1ca0..f110302ff2b10c8a78f4ac9328290a9273bb7578:/configpm diff --git a/configpm b/configpm index bee74a9..86abd6d 100755 --- a/configpm +++ b/configpm @@ -1,109 +1,473 @@ #!./miniperl -w -$config_pm = $ARGV[0] || 'lib/Config.pm'; +my $config_pm = $ARGV[0] || 'lib/Config.pm'; +my $glossary = $ARGV[1] || 'Porting/Glossary'; @ARGV = "./config.sh"; # list names to put first (and hence lookup fastest) -@fast = qw(osname osvers so libpth archlib +@fast = qw(archname osname osvers prefix libs libpth + dynamic_ext static_ext extensions dlsrc so + sig_name sig_num cc ccflags cppflags + privlibexp archlibexp installprivlib installarchlib sharpbang startsh shsharp - dynamic_ext static_ext extensions dl_src - sig_name ccflags cppflags intsize); +); # names of things which may need to have slashes changed to double-colons @extensions = qw(dynamic_ext static_ext extensions known_extensions); open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; -$myver = sprintf("%.3f", $]); -print CONFIG <<"ENDOFBEG"; +$myver = sprintf "v%vd", $^V; + +print CONFIG <<'ENDOFBEG_NOQ', <<"ENDOFBEG"; package Config; -require Exporter; -\@ISA = (Exporter); -\@EXPORT = qw(%Config); +use Exporter (); +@EXPORT = qw(%Config); +@EXPORT_OK = qw(myconfig config_sh config_vars); + +# Define our own import method to avoid pulling in the full Exporter: +sub import { + my $pkg = shift; + @_ = @EXPORT unless @_; + my @func = grep {$_ ne '%Config'} @_; + local $Exporter::ExportLevel = 1; + Exporter::import('Config', @func) if @func; + return if @func == @_; + my $callpkg = caller(0); + *{"$callpkg\::Config"} = \%Config; +} -\$] == $myver or die sprintf - "Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$]; +ENDOFBEG_NOQ +die "Perl lib version ($myver) doesn't match executable version (\$])" + unless \$^V; + +\$^V eq $myver + or die "Perl lib version ($myver) doesn't match executable version (" . + (sprintf "v%vd",\$^V) . ")"; # 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. ENDOFBEG + @fast{@fast} = @fast; @extensions{@extensions} = @extensions; @non_v=(); @v_fast=(); @v_others=(); +$in_v = 0; while (<>) { next if m:^#!/bin/sh:; - # Catch CONFIG=true and PATCHLEVEL=n line from Configure. + # Catch PERL_CONFIG_SH=true and PERL_VERSION=n line from Configure. s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/; - unless (m/^(\w+)='(.*)'\s*$/){ + 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; } - $name = $1; + $quote = $2; + if ($in_v) { $val .= $_; } + else { ($name,$val) = ($1,$3); } + $in_v = $val !~ /$quote\n/; + next if $in_v; if ($extensions{$name}) { s,/,::,g } - if (!$fast{$name}){ push(@v_others, $_); next; } - push(@v_fast,$_); + if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; } + push(@v_fast,"$name=$quote$val"); } foreach(@non_v){ print CONFIG $_ } print CONFIG "\n", - "\$config_sh=<<'!END!OF!CONFIG!';\n", + "my \$config_sh = <<'!END!';\n", join("", @v_fast, sort @v_others), - "!END!OF!CONFIG!\n\n"; + "!END!\n\n"; + +# copy config summary format from the myconfig.SH script + +print CONFIG "my \$summary = <<'!END!';\n"; + +open(MYCONFIG,") && !/^Summary of/; +do { print CONFIG $_ } until !defined($_ = ) || /^\s*$/; +close(MYCONFIG); + +print CONFIG "\n!END!\n", <<'EOT'; +my $summary_expanded = 0; + +sub myconfig { + return $summary if $summary_expanded; + $summary =~ s{\$(\w+)} + { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; + $summary_expanded = 1; + $summary; +} +EOT +# ---- print CONFIG <<'ENDOFEND'; -tie %Config, Config; -sub TIEHASH { bless {} } sub FETCH { - # check for cached value (which maybe undef so we use exists not defined) + # check for cached value (which may be 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 $Config{'foo'}". + + # Search for it in the big string + my($value, $start, $marker, $quote_type); + + $quote_type = "'"; + # Virtual entries. + if ($_[1] eq 'byteorder') { + # byteorder does exist on its own but we overlay a virtual + # dynamically recomputed value. + my $t = $Config{ivtype}; + my $s = $Config{ivsize}; + my $f = $t eq 'long' ? 'L!' : $s == 8 ? 'Q': 'I'; + if ($s == 4 || $s == 8) { + my $i = 0; + foreach my $c (reverse(2..$s)) { $i |= ord($c); $i <<= 8 } + $i |= ord(1); + $value = join('', unpack('a'x$s, pack($f, $i))); + } else { + $value = '?'x$s; + } + } elsif ($_[1] =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) { + # These are purely virtual, they do not exist, but need to + # be computed on demand for largefile-incapable extensions. + my $key = "${1}_uselargefiles"; + $value = $Config{$1}; + my $withlargefiles = $Config{$key}; + if ($key =~ /^(?:cc|ld)flags_/) { + $value =~ s/\Q$withlargefiles\E\b//; + } elsif ($key =~ /^libs/) { + my @lflibswanted = split(' ', $Config{libswanted_uselargefiles}); + if (@lflibswanted) { + my %lflibswanted; + @lflibswanted{@lflibswanted} = (); + if ($key =~ /^libs_/) { + my @libs = grep { /^-l(.+)/ && + not exists $lflibswanted{$1} } + split(' ', $Config{libs}); + $Config{libs} = join(' ', @libs); + } elsif ($key =~ /^libswanted_/) { + my @libswanted = grep { not exists $lflibswanted{$_} } + split(' ', $Config{libswanted}); + $Config{libswanted} = join(' ', @libswanted); + } + } + } + } else { + $marker = "$_[1]="; + # return undef unless (($value) = $config_sh =~ m/^$_[1]='(.*)'\s*$/m); + # Check for the common case, ' delimeted + $start = index($config_sh, "\n$marker$quote_type"); + # If that failed, check for " delimited + if ($start == -1) { + $quote_type = '"'; + $start = index($config_sh, "\n$marker$quote_type"); + } + return undef if ( ($start == -1) && # in case it's first + (substr($config_sh, 0, length($marker)) ne $marker) ); + if ($start == -1) { + # It's the very first thing we found. Skip $start forward + # and figure out the quote mark after the =. + $start = length($marker) + 1; + $quote_type = substr($config_sh, $start - 1, 1); + } + else { + $start += length($marker) + 2; + } + $value = substr($config_sh, $start, + index($config_sh, "$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\""; + } + #$value = sprintf($value) if $quote_type eq '"'; + # So we can say "if $Config{'foo'}". + $value = undef if $value eq 'undef'; $_[0]->{$_[1]} = $value; # cache it return $value; } +my $prevpos = 0; + sub FIRSTKEY { $prevpos = 0; - my $key; - ($key) = $config_sh =~ m/^(.*)=/; - $key; + # my($key) = $config_sh =~ m/^(.*?)=/; + substr($config_sh, 0, index($config_sh, '=') ); + # $key; } sub NEXTKEY { - my ($pos, $len); - $pos = $prevpos; - $pos = index( $config_sh, "\n", $pos) + 1; + # Find out how the current key's quoted so we can skip to its end. + my $quote = substr($config_sh, index($config_sh, "=", $prevpos)+1, 1); + my $pos = index($config_sh, qq($quote\n), $prevpos) + 2; + my $len = index($config_sh, "=", $pos) - $pos; $prevpos = $pos; - $len = index( $config_sh, "=", $pos) - $pos; - $len > 0 ? substr( $config_sh, $pos, $len) : undef; + $len > 0 ? substr($config_sh, $pos, $len) : undef; } -sub EXISTS{ - exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; +sub EXISTS { + # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; + exists($_[0]->{$_[1]}) or + index($config_sh, "\n$_[1]='") != -1 or + substr($config_sh, 0, length($_[1])+2) eq "$_[1]='" or + index($config_sh, "\n$_[1]=\"") != -1 or + substr($config_sh, 0, length($_[1])+2) eq "$_[1]=\"" or + $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/; } -sub readonly { die "\%Config::Config is read-only\n" } +sub STORE { die "\%Config::Config is read-only\n" } +sub DELETE { &STORE } +sub CLEAR { &STORE } -sub STORE { &readonly } -sub DELETE{ &readonly } -sub CLEAR { &readonly } +sub config_sh { + $config_sh +} + +sub config_re { + my $re = shift; + my @matches = ($config_sh =~ /^$re=.*\n/mg); + @matches ? (print @matches) : print "$re: not found\n"; +} + +sub config_vars { + foreach(@_){ + config_re($_), next if /\W/; + my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; + $v='undef' unless defined $v; + print "$_='$v';\n"; + } +} -1; ENDOFEND +if ($^O eq 'os2') { + print CONFIG <<'ENDOFSET'; +my %preconfig; +if ($OS2::is_aout) { + my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; + for (split ' ', $value) { + ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; + $preconfig{$_} = $v eq 'undef' ? undef : $v; + } +} +$preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't +sub TIEHASH { bless {%preconfig} } +ENDOFSET +} else { + print CONFIG <<'ENDOFSET'; +sub TIEHASH { bless {} } +ENDOFSET +} + +print CONFIG <<'ENDOFTAIL'; + +# avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD +sub DESTROY { } + +tie %Config, 'Config'; + +1; +__END__ + +=head1 NAME + +Config - access Perl configuration information + +=head1 SYNOPSIS + + use Config; + if ($Config{'cc'} =~ /gcc/) { + print "built by gcc\n"; + } + + use Config qw(myconfig config_sh config_vars); + + print myconfig(); + + print config_sh(); + + 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_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 + +open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; +%seen = (); +$text = 0; +$/ = ''; + +sub process { + 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 < paragraphs + 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 +} + +; # Skip the preamble +while () { + process; + print CONFIG; +} + +print CONFIG <<'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); +close(GLOS); # Now do some simple tests on the Config.pm file we have created unshift(@INC,'lib'); @@ -111,11 +475,11 @@ require $config_pm; import Config; die "$0: $config_pm not valid" - unless $Config{'CONFIG'} eq 'true'; + unless $Config{'PERL_CONFIG_SH'} eq 'true'; 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"