104 lines
3.0 KiB
Perl
104 lines
3.0 KiB
Perl
package ExtUtils::Mkbootstrap;
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$VERSION = substr q$Revision: 1.13 $, 10;
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# $Date: 1996/09/03 17:04:43 $
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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 a
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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
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