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package ExtUtils::Mkbootstrap; |
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$VERSION = 1.15; |
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use Config; |
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use Exporter; |
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@ISA=('Exporter'); |
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@EXPORT='&Mkbootstrap'; |
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sub Mkbootstrap { |
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my($baseext, @bsloadlibs)=@_; |
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@bsloadlibs = grep($_, @bsloadlibs); # strip empty libs |
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print STDOUT " bsloadlibs=@bsloadlibs\n" if $Verbose; |
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# We need DynaLoader here because we and/or the *_BS file may |
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# call dl_findfile(). We don't say `use' here because when |
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# first building perl extensions the DynaLoader will not have |
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# been built when MakeMaker gets first used. |
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require DynaLoader; |
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rename "$baseext.bs", "$baseext.bso" |
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if -s "$baseext.bs"; |
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if (-f "${baseext}_BS"){ |
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$_ = "${baseext}_BS"; |
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package DynaLoader; # execute code as if in DynaLoader |
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local($osname, $dlsrc) = (); # avoid warnings |
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($osname, $dlsrc) = @Config::Config{qw(osname dlsrc)}; |
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$bscode = ""; |
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unshift @INC, "."; |
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require $_; |
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shift @INC; |
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} |
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if ($Config{'dlsrc'} =~ /^dl_dld/){ |
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package DynaLoader; |
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push(@dl_resolve_using, dl_findfile('-lc')); |
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} |
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my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using); |
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my($method) = ''; |
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if (@all){ |
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open BS, ">$baseext.bs" |
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or die "Unable to open $baseext.bs: $!"; |
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print STDOUT "Writing $baseext.bs\n"; |
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print STDOUT " containing: @all" if $Verbose; |
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print BS "# $baseext DynaLoader bootstrap file for $^O architecture.\n"; |
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print BS "# Do not edit this file, changes will be lost.\n"; |
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print BS "# This file was automatically generated by the\n"; |
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print BS "# Mkbootstrap routine in ExtUtils::Mkbootstrap (v$VERSION).\n"; |
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print BS "\@DynaLoader::dl_resolve_using = "; |
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# If @all contains names in the form -lxxx or -Lxxx then it's asking for |
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# runtime library location so we automatically add a call to dl_findfile() |
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if (" @all" =~ m/ -[lLR]/){ |
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print BS " dl_findfile(qw(\n @all\n ));\n"; |
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}else{ |
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print BS " qw(@all);\n"; |
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} |
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# write extra code if *_BS says so |
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print BS $DynaLoader::bscode if $DynaLoader::bscode; |
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print BS "\n1;\n"; |
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close BS; |
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} |
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} |
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1; |
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__END__ |
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=head1 NAME |
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ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader |
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=head1 SYNOPSIS |
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C<Mkbootstrap> |
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=head1 DESCRIPTION |
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Mkbootstrap typically gets called from an extension Makefile. |
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There is no C<*.bs> file supplied with the extension. Instead, there may |
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be a C<*_BS> file which has code for the special cases, like posix for |
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berkeley db on the NeXT. |
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This file will get parsed, and produce a maybe empty |
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C<@DynaLoader::dl_resolve_using> array for the current architecture. |
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That will be extended by $BSLOADLIBS, which was computed by |
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ExtUtils::Liblist::ext(). If this array still is empty, we do nothing, |
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else we write a .bs file with an C<@DynaLoader::dl_resolve_using> |
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array. |
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The C<*_BS> file can put some code into the generated C<*.bs> file by |
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placing it in C<$bscode>. This is a handy 'escape' mechanism that may |
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prove useful in complex situations. |
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If @DynaLoader::dl_resolve_using contains C<-L*> or C<-l*> entries then |
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Mkbootstrap will automatically add a dl_findfile() call to the |
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generated C<*.bs> file. |
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=cut |
