X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=configpm;h=e5f2c088498ab5d81ed2e46f313ee0b15bcb975d;hb=2c8ddff3c182e26372c9343750c9b3c45e438ca2;hp=4bdde612de933bdde14b20eb9248b73c506ad1ff;hpb=9b22980b339b4f89c40095204779dd6542c70c64;p=p5sagit%2Fp5-mst-13.2.git diff --git a/configpm b/configpm index 4bdde61..e5f2c08 100755 --- a/configpm +++ b/configpm @@ -1,97 +1,172 @@ #!./miniperl -w -# following options are recognized: -# --no-glossary - no glossary file inclusion, for compactness -# --cross=PALTFORM - crosscompiling for PLATFORM -my %opts = ( - # %known_opts enumerates allowed opts as well as specifies default and initial values - my %known_opts = ( - 'cross' => '', - 'glossary' => 1, - ), - # options itself - my %specified_opts = ( - (map {/^--([\-_\w]+)=(.*)$/} @ARGV), # --opt=smth - (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV), # --opt --no-opt --noopt - ), +# commonly used names to put first (and hence lookup fastest) +my %Common = map {($_,$_)} + qw(archname osname osvers prefix libs libpth + dynamic_ext static_ext dlsrc so + cc ccflags cppflags + privlibexp archlibexp installprivlib installarchlib + sharpbang startsh shsharp + ); + +# names of things which may need to have slashes changed to double-colons +my %Extensions = map {($_,$_)} + qw(dynamic_ext static_ext extensions known_extensions); + +# allowed opts as well as specifies default and initial values +my %Allowed_Opts = ( + 'cross' => '', # --cross=PALTFORM - crosscompiling for PLATFORM + 'glossary' => 1, # --no-glossary - no glossary file inclusion, + # for compactness ); -die "option '$_' is not recognized" for grep {!exists $known_opts{$_}} keys %specified_opts; -@ARGV = grep {!/^--/} @ARGV; -my $config_pm; -my $glossary = $ARGV[1] || 'Porting/Glossary'; +sub opts { + # user specified options + my %given_opts = ( + # --opt=smth + (map {/^--([\-_\w]+)=(.*)$/} @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 '$opt' is not recognized"; + } + @ARGV = grep {!/^--/} @ARGV; + + return %opts; +} + + +my %Opts = opts(); -if ($opts{cross}) { +my $Config_PM; +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"; + mkdir "xlib/$Opts{cross}"; + $Config_PM = $ARGV[0] || "xlib/$Opts{cross}/Config.pm"; } else { - $config_pm = $ARGV[0] || 'lib/Config.pm'; + $Config_PM = $ARGV[0] || 'lib/Config.pm'; } -@ARGV = "./config.sh"; -# list names to put first (and hence lookup fastest) -@fast = qw(archname osname osvers prefix libs libpth - dynamic_ext static_ext extensions dlsrc so - sig_name sig_num cc ccflags cppflags - privlibexp archlibexp installprivlib installarchlib - sharpbang startsh shsharp -); - -# names of things which may need to have slashes changed to double-colons -@extensions = qw(dynamic_ext static_ext extensions known_extensions); +open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n"; +my $myver = sprintf "v%vd", $^V; -open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; -$myver = sprintf "v%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. -print CONFIG <<'ENDOFBEG_NOQ', <<"ENDOFBEG"; package Config; -use Exporter (); -@EXPORT = qw(%Config); -@EXPORT_OK = qw(myconfig config_sh config_vars); +@EXPORT = qw(%%Config); +@EXPORT_OK = qw(myconfig config_sh config_vars config_re); + +my %%Export_Cache = map {($_ => 1)} (@EXPORT, @EXPORT_OK); # 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; -} + my $pkg = shift; + @_ = @EXPORT unless @_; -ENDOFBEG_NOQ -die "Perl lib version ($myver) doesn't match executable version (\$])" - unless \$^V; + my @funcs = grep $_ ne '%%Config', @_; + my $export_Config = @funcs < @_ ? 1 : 0; -\$^V eq $myver - or die "Perl lib version ($myver) doesn't match executable version (" . - (sprintf "v%vd",\$^V) . ")"; + 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} = \&{$func}; + } -# This file was created by configpm when Perl was built. Any changes -# made to this file will be lost the next time perl is built. + *{"$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",$^V) . ")"; ENDOFBEG -@fast{@fast} = @fast; -@extensions{@extensions} = @extensions; -@non_v=(); -@v_fast=(); -@v_others=(); -$in_v = 0; +my @non_v = (); +my @v_fast = (); +my %v_fast = (); +my @v_others = (); +my $in_v = 0; +my %Data = (); + +# 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) = @_; + + my $quote_type = "'"; + my $marker = "$key="; -while (<>) { + # Check for the common case, ' delimited + my $start = index($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; + } + + my $value = substr($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\""; + } + + # So we can say "if $Config{'foo'}". + $value = undef if $value eq 'undef'; + $self->{$key} = $value; # cache it +} +EOT + +eval $fetch_string; +die if $@; + +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='$2'\n/; - my ($k,$v) = ($1,$2); + s/^(\w+)=(true|\d+)\s*$/$1='$2'\n/ or m/^(\w+)='(.*)'$/; + my($k, $v) = ($1, $2); + # grandfather PATCHLEVEL and SUBVERSION and CONFIG if ($k) { if ($k eq 'PERL_VERSION') { @@ -104,235 +179,264 @@ while (<>) { push @v_others, "CONFIG='$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; } $quote = $2; - if ($in_v) { $val .= $_; } - else { ($name,$val) = ($1,$3); } + if ($in_v) { + $val .= $_; + } + else { + ($name,$val) = ($1,$3); + } $in_v = $val !~ /$quote\n/; next if $in_v; - if ($extensions{$name}) { s,/,::,g } - if (!$fast{$name}){ push(@v_others, "$name=$quote$val"); next; } - push(@v_fast,"$name=$quote$val"); + + s,/,::,g if $Extensions{$name}; + + $val =~ s/$quote\n?\z//; + + my $line = "$name=$quote$val$quote\n"; + if (!$Common{$name}){ + push(@v_others, $line); + } + else { + push(@v_fast, $line); + $v_fast{$name} = "'$name' => $quote$val$quote"; + } } +close CONFIG_SH; -foreach(@non_v){ print CONFIG $_ } +# Calculation for the keys for byteorder +# This is somewhat grim, but I need to run fetch_string here. +our $Config_SH = join "\n", @v_fast, @v_others; -print CONFIG "\n", - "my \$config_sh = <<'!END!';\n", - join("", @v_fast, sort @v_others), - "!END!\n\n"; +my $t = fetch_string ({}, 'ivtype'); +my $s = fetch_string ({}, 'ivsize'); -# copy config summary format from the myconfig.SH script +# 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'; -print CONFIG "my \$summary = <<'!END!';\n"; +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); +my \$byteorder = join('', unpack('$format', pack('$f', \$i))); +EOT +} else { + $byteorder_code = "my \$byteorder = '?'x$s;\n"; +} + +print CONFIG @non_v, "\n"; +# copy config summary format from the myconfig.SH script +print CONFIG "our \$summary : unique = <<'!END!';\n"; open(MYCONFIG,") && !/^Summary of/; do { print CONFIG $_ } until !defined($_ = ) || /^\s*$/; close(MYCONFIG); -print CONFIG "\n!END!\n", <<'EOT'; -my $summary_expanded = 0; +# NB. as $summary is unique, we need to copy it in a lexical variable +# before expanding it, because may have been made readonly if a perl +# interpreter has been cloned. + +print CONFIG "\n!END!\n", $byteorder_code, <<'EOT'; +my $summary_expanded; sub myconfig { - return $summary if $summary_expanded; - $summary =~ s{\$(\w+)} - { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; - $summary_expanded = 1; - $summary; + return $summary_expanded if $summary_expanded; + ($summary_expanded = $summary) =~ s{\$(\w+)} + { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; + $summary_expanded; } + +local *_ = \my $a; +$_ = <<'!END!'; EOT -# ---- +print CONFIG join("", @v_fast, sort @v_others); + +print CONFIG <<'EOT'; +!END! +s/(byteorder=)(['"]).*?\2/$1$2$byteorder$2/m; +our $Config_SH : unique = $_; +EOT + +print CONFIG $fetch_string; print CONFIG <<'ENDOFEND'; -sub FETCH { - # check for cached value (which may be undef so we use exists not defined) - return $_[0]->{$_[1]} if (exists $_[0]->{$_[1]}); - - # 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 ($_[1] =~ /^((?:cc|ld)flags|libs(?:wanted)?)_nolargefiles/) { +sub fetch_virtual { + my($self, $key) = @_; + + my $value; + + if ($key =~ /^((?: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"; + my $new_key = "${1}_uselargefiles"; $value = $Config{$1}; - my $withlargefiles = $Config{$key}; - if ($key =~ /^(?:cc|ld)flags_/) { + my $withlargefiles = $Config{$new_key}; + if ($new_key =~ /^(?:cc|ld)flags_/) { $value =~ s/\Q$withlargefiles\E\b//; - } elsif ($key =~ /^libs/) { + } elsif ($new_key =~ /^libs/) { my @lflibswanted = split(' ', $Config{libswanted_uselargefiles}); if (@lflibswanted) { my %lflibswanted; @lflibswanted{@lflibswanted} = (); - if ($key =~ /^libs_/) { + if ($new_key =~ /^libs_/) { my @libs = grep { /^-l(.+)/ && not exists $lflibswanted{$1} } split(' ', $Config{libs}); $Config{libs} = join(' ', @libs); - } elsif ($key =~ /^libswanted_/) { + } elsif ($new_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; + + $self->{$key} = $value; +} + +sub FETCH { + my($self, $key) = @_; + + # check for cached value (which may be undef so we use exists not defined) + return $self->{$key} if exists $self->{$key}; + + $self->fetch_string($key); + return $self->{$key} if exists $self->{$key}; + $self->fetch_virtual($key); + + # Might not exist, in which undef is correct. + return $self->{$key}; } my $prevpos = 0; sub FIRSTKEY { $prevpos = 0; - # my($key) = $config_sh =~ m/^(.*?)=/; - substr($config_sh, 0, index($config_sh, '=') ); - # $key; + substr($Config_SH, 0, index($Config_SH, '=') ); } sub NEXTKEY { # 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; + 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; - $len > 0 ? substr($config_sh, $pos, $len) : undef; + $len > 0 ? substr($Config_SH, $pos, $len) : undef; } sub EXISTS { - # exists($_[0]->{$_[1]}) or $config_sh =~ m/^$_[1]=/m; - 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 - $_[1] =~ /^(?:(?:cc|ld)flags|libs(?:wanted)?)_nolargefiles$/; + return 1 if exists($_[0]->{$_[1]}); + + return(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 STORE { die "\%Config::Config is read-only\n" } -sub DELETE { &STORE } -sub CLEAR { &STORE } +*DELETE = \&STORE; +*CLEAR = \&STORE; sub config_sh { - $config_sh + $Config_SH } sub config_re { my $re = shift; - my @matches = grep /^$re=/, split /^/, $config_sh; - @matches ? (print @matches) : print "$re: not found\n"; + return map { chomp; $_ } grep eval{ /^(?:$re)=/ }, split /^/, $Config_SH; } sub config_vars { - foreach(@_){ - config_re($_), next if /\W/; - my $v=(exists $Config{$_}) ? $Config{$_} : 'UNKNOWN'; - $v='undef' unless defined $v; - print "$_='$v';\n"; + foreach (@_) { + my ($notag,$qry,$lncont) = m/^(:)?(.*?)(:)?$/; # flags fore and aft, + my $prfx = $notag ? '': "$qry="; # prefix for print + my $lnend = $lncont ? ' ' : ";\n"; # ending for print + + if ($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 $Config{$qry}) ? $Config{$qry} : 'UNKNOWN'; + $v = 'undef' unless defined $v; + print "${prfx}'${v}'$lnend"; + } } } ENDOFEND if ($^O eq 'os2') { - print CONFIG <<'ENDOFSET'; + print CONFIG <<'ENDOFSET'; my %preconfig; if ($OS2::is_aout) { - my ($value, $v) = $config_sh =~ m/^used_aout='(.*)'\s*$/m; + my ($value, $v) = $Config_SH =~ m/^used_aout='(.*)'\s*$/m; for (split ' ', $value) { - ($v) = $config_sh =~ m/^aout_$_='(.*)'\s*$/m; + ($v) = $Config_SH =~ m/^aout_$_='(.*)'\s*$/m; $preconfig{$_} = $v eq 'undef' ? undef : $v; } } $preconfig{d_fork} = undef unless $OS2::can_fork; # Some funny cases can't sub TIEHASH { bless {%preconfig} } ENDOFSET - # Extract the name of the DLL from the makefile to avoid duplication - my ($f) = grep -r, qw(GNUMakefile Makefile); - my $dll; - if (open my $fh, '<', $f) { - while (<$fh>) { - $dll = $1, last if /^PERL_DLL_BASE\s*=\s*(\S*)\s*$/; + # 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 < $byteorder' ; + +print CONFIG sprintf <<'ENDOFTIE', $fast_config; # avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD sub DESTROY { } -tie %Config, 'Config'; +tie %%Config, 'Config', { +%s +}; 1; -__END__ +ENDOFTIE + +open(CONFIG_POD, ">lib/Config.pod") or die "Can't open lib/Config.pod: $!"; +print CONFIG_POD <<'ENDOFTAIL'; =head1 NAME Config - access Perl configuration information @@ -340,16 +444,18 @@ Config - access Perl configuration information =head1 SYNOPSIS use Config; - if ($Config{'cc'} =~ /gcc/) { - print "built by gcc\n"; + if ($Config{usethreads}) { + print "has thread support\n" } - use Config qw(myconfig config_sh config_vars); + use Config qw(myconfig config_sh config_vars config_re); print myconfig(); print config_sh(); + print config_re(); + config_vars(qw(osname archname)); @@ -377,6 +483,11 @@ See also C<-V> in L. Returns the entire perl configuration information in the form of the original config.sh shell variable assignment script. +=item config_re($regex) + +Like config_sh() but returns, as a list, only the config entries who's +names match the $regex. + =item config_vars(@names) Prints to STDOUT the values of the named configuration variable. Each is @@ -443,8 +554,8 @@ in such cases. ENDOFTAIL -if ($opts{glossary}) { - open(GLOS, "<$glossary") or die "Can't open $glossary: $!"; +if ($Opts{glossary}) { + open(GLOS, "<$Glossary") or die "Can't open $Glossary: $!"; } %seen = (); $text = 0; @@ -454,11 +565,11 @@ 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{$c}++) { - print CONFIG <; # Skip the preamble +if ($Opts{glossary}) { + ; # Skip the "DO NOT EDIT" + ; # Skip the preamble while () { process; - print CONFIG; + print CONFIG_POD; } } -print CONFIG <<'ENDOFTAIL'; +print CONFIG_POD <<'ENDOFTAIL'; =back @@ -523,9 +635,10 @@ ENDOFTAIL close(CONFIG); close(GLOS); +close(CONFIG_POD); # Now create Cross.pm if needed -if ($opts{cross}) { +if ($Opts{cross}) { open CROSS, ">lib/Cross.pm" or die "Can not open >lib/Cross.pm: $!"; my $cross = <<'EOS'; # typical invocation: @@ -546,26 +659,25 @@ sub import { 1; EOS - $cross =~ s/\*\*\*replace-marker\*\*\*/$opts{cross}/g; + $cross =~ s/\*\*\*replace-marker\*\*\*/$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; +require $Config_PM; import Config; -die "$0: $config_pm not valid" +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{'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"}' ;