X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/748a93069b3d16374a9859d1456065dd3ae11394..2a4f803ae2c2b6de1c29a5c91efdcd59411303dc:/configpm diff --git a/configpm b/configpm index 7f3ec3e..f232c9b 100755 --- a/configpm +++ b/configpm @@ -1,155 +1,674 @@ #!./miniperl -w -$config_pm = $ARGV[0] || 'lib/Config.pm'; -@ARGV = "./config.sh"; - -# list names to put first (and hence lookup fastest) -@fast = qw(osname osvers so libpth archlib - sharpbang startsh shsharp - dynamic_ext static_ext extensions dl_src - sig_name ccflags cppflags intsize); +# commonly used names to put first (and hence lookup fastest) +my %Common = map {($_,$_)} + qw(archname osname osvers prefix libs libpth + dynamic_ext static_ext dlsrc so + cc ccflags cppflags + privlibexp archlibexp installprivlib installarchlib + sharpbang startsh shsharp + ); # names of things which may need to have slashes changed to double-colons -@extensions = qw(dynamic_ext static_ext extensions known_extensions); +my %Extensions = map {($_,$_)} + qw(dynamic_ext static_ext extensions known_extensions); +# allowed opts as well as specifies default and initial values +my %Allowed_Opts = ( + 'cross' => '', # --cross=PALTFORM - crosscompiling for PLATFORM + 'glossary' => 1, # --no-glossary - no glossary file inclusion, + # for compactness +); -open CONFIG, ">$config_pm" or die "Can't open $config_pm: $!\n"; -$myver = sprintf("%.3f", $]); -print CONFIG <<"ENDOFBEG"; -package Config; -require Exporter; -\@ISA = (Exporter); -\@EXPORT = qw(%Config); +sub opts { + # user specified options + my %given_opts = ( + # --opt=smth + (map {/^--([\-_\w]+)=(.*)$/} @ARGV), + # --opt --no-opt --noopt + (map {/^no-?(.*)$/i?($1=>0):($_=>1)} map {/^--([\-_\w]+)$/} @ARGV), + ); + + my %opts = (%Allowed_Opts, %given_opts); -\$] == $myver or die sprintf - "Perl lib version ($myver) doesn't match executable version (%.3f)\\n", \$]; + 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; +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 = $ARGV[0] || 'lib/Config.pm'; +} + + +open CONFIG, ">$Config_PM" or die "Can't open $Config_PM: $!\n"; + +my $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. +package Config; +@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 @funcs = grep $_ ne '%%Config', @_; + my $export_Config = @funcs < @_ ? 1 : 0; + + 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; -@extensions{@extensions} = @extensions; -@non_v=(); -@v_fast=(); -@v_others=(); -while (<>) { +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="; + + # 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: $!"; +while () { next if m:^#!/bin/sh:; - # Catch CONFIG=true and PATCHLEVEL=n line from Configure. - s/^(\w+)=(true|\d+)\s*$/$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; } - $name = $1; - if ($extensions{$name}) { s,/,::,g } - if (!$fast{$name}){ push(@v_others, $_); next; } - push(@v_fast,$_); + $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$quote\n"; + if (!$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 $_ } +print CONFIG @non_v, "\n"; -print CONFIG "\n", - "\$config_sh=<<'!END!OF!CONFIG!';\n", - join("", @v_fast, sort @v_others), - "!END!OF!CONFIG!\n\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); +# 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", <<'EOT'; +my $summary_expanded; + +sub myconfig { + return $summary_expanded if $summary_expanded; + ($summary_expanded = $summary) =~ s{\$(\w+)} + { my $c = $Config{$1}; defined($c) ? $c : 'undef' }ge; + $summary_expanded; +} + +our $Config_SH : unique = <<'!END!'; +EOT + +print CONFIG join("", @v_fast, sort @v_others); + +print CONFIG "!END!\n", $fetch_string; print CONFIG <<'ENDOFEND'; -tie %Config, Config; -sub TIEHASH { bless {} } +sub fetch_virtual { + my($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 $new_key = "${1}_uselargefiles"; + $value = $Config{$1}; + my $withlargefiles = $Config{$new_key}; + if ($new_key =~ /^(?:cc|ld)flags_/) { + $value =~ s/\Q$withlargefiles\E\b//; + } elsif ($new_key =~ /^libs/) { + my @lflibswanted = split(' ', $Config{libswanted_uselargefiles}); + if (@lflibswanted) { + my %lflibswanted; + @lflibswanted{@lflibswanted} = (); + if ($new_key =~ /^libs_/) { + my @libs = grep { /^-l(.+)/ && + not exists $lflibswanted{$1} } + split(' ', $Config{libs}); + $Config{libs} = join(' ', @libs); + } elsif ($new_key =~ /^libswanted_/) { + my @libswanted = grep { not exists $lflibswanted{$_} } + split(' ', $Config{libswanted}); + $Config{libswanted} = join(' ', @libswanted); + } + } + } + } + + $self->{$key} = $value; +} + 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 $value; + my($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 $key; - ($key) = $config_sh =~ m/^(.*)=/; - $key; + substr($Config_SH, 0, index($Config_SH, '=') ); } sub NEXTKEY { - my ($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 { + 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 readonly { die "\%Config::Config is read-only\n" } +sub STORE { die "\%Config::Config is read-only\n" } +*DELETE = \&STORE; +*CLEAR = \&STORE; -sub myconfig { - my($output); - - $output = <<'END'; -Summary of my $package (patchlevel $PATCHLEVEL) configuration: - Platform: - osname=$osname, osver=$osvers, archname=$archname - uname='$myuname' - hint=$hint - Compiler: - cc='$cc', optimize='$optimize' - cppflags='$cppflags' - ccflags ='$ccflags' - ldflags ='$ldflags' - stdchar='$stdchar', d_stdstdio=$d_stdstdio, usevfork=$usevfork - voidflags=$voidflags, castflags=$castflags, d_casti32=$d_casti32, d_castneg=$d_castneg - intsize=$intsize, alignbytes=$alignbytes, usemymalloc=$usemymalloc, randbits=$randbits - Libraries: - so=$so - libpth=$libpth - libs=$libs - libc=$libc - Dynamic Linking: - dlsrc=$dlsrc, dlext=$dlext, d_dlsymun=$d_dlsymun - cccdlflags='$cccdlflags', ccdlflags='$ccdlflags', lddlflags='$lddlflags' - -END - $output =~ s/\$(\w+)/$Config{$1}/ge; - $output; -} - -sub STORE { &readonly } -sub DELETE{ &readonly } -sub CLEAR { &readonly } +sub config_sh { + $Config_SH +} + +sub config_re { + my $re = shift; + return map { chomp; $_ } grep /^$re=/, split /^/, $Config_SH; +} + +sub config_vars { + foreach (@_) { + if (/\W/) { + my @matches = config_re($_); + print map "$_\n", @matches ? @matches : "$_: not found"; + } else { + 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 $OS2::can_fork; # Some funny cases can't +sub TIEHASH { bless {%preconfig} } +ENDOFSET + # Extract the name of the DLL from the makefile to avoid duplication + my ($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 < $value' ; + +print CONFIG sprintf <<'ENDOFTIE', $byteorder_code, $fast_config; + +# avoid Config..Exporter..UNIVERSAL search for DESTROY then AUTOLOAD +sub DESTROY { } + +%s + +tie %%Config, 'Config', { +%s +}; + +1; +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{'cc'} =~ /gcc/) { + print "built by gcc\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: $!"; +} +%seen = (); +$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); +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; +require $Config_PM; 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"}' ;