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| package ExtUtils::Mkbootstrap; | |
| use strict; | |
| use warnings; | |
| our $VERSION = '7.62'; | |
| $VERSION =~ tr/_//d; | |
| require Exporter; | |
| our @ISA = ('Exporter'); | |
| our @EXPORT = ('&Mkbootstrap'); | |
| use Config; | |
| our $Verbose = 0; | |
| sub Mkbootstrap { | |
| my($baseext, @bsloadlibs)=@_; | |
| @bsloadlibs = grep($_, @bsloadlibs); # strip empty libs | |
| print " bsloadlibs=@bsloadlibs\n" if $Verbose; | |
| # We need DynaLoader here because we and/or the *_BS file may | |
| # call dl_findfile(). We don't say `use' here because when | |
| # first building perl extensions the DynaLoader will not have | |
| # been built when MakeMaker gets first used. | |
| require DynaLoader; | |
| rename "$baseext.bs", "$baseext.bso" | |
| if -s "$baseext.bs"; | |
| if (-f "${baseext}_BS"){ | |
| $_ = "${baseext}_BS"; | |
| package DynaLoader; # execute code as if in DynaLoader | |
| no strict 'vars'; | |
| local($osname, $dlsrc) = (); # avoid warnings | |
| ($osname, $dlsrc) = @Config::Config{qw(osname dlsrc)}; | |
| $bscode = ""; | |
| unshift @INC, "."; | |
| require $_; | |
| shift @INC; | |
| } | |
| if ($Config{'dlsrc'} =~ /^dl_dld/){ | |
| package DynaLoader; | |
| no strict 'vars'; | |
| push(@dl_resolve_using, dl_findfile('-lc')); | |
| } | |
| my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using); | |
| my($method) = ''; | |
| if (@all || (defined $DynaLoader::bscode && length $DynaLoader::bscode)){ | |
| open my $bs, ">", "$baseext.bs" | |
| or die "Unable to open $baseext.bs: $!"; | |
| print "Writing $baseext.bs\n"; | |
| print " containing: @all" if $Verbose; | |
| print $bs "# $baseext DynaLoader bootstrap file for $^O architecture.\n"; | |
| print $bs "# Do not edit this file, changes will be lost.\n"; | |
| print $bs "# This file was automatically generated by the\n"; | |
| print $bs "# Mkbootstrap routine in ExtUtils::Mkbootstrap (v$VERSION).\n"; | |
| if (@all) { | |
| print $bs "\@DynaLoader::dl_resolve_using = "; | |
| # If @all contains names in the form -lxxx or -Lxxx then it's asking for | |
| # runtime library location so we automatically add a call to dl_findfile() | |
| if (" @all" =~ m/ -[lLR]/){ | |
| print $bs " dl_findfile(qw(\n @all\n ));\n"; | |
| } else { | |
| print $bs " qw(@all);\n"; | |
| } | |
| } | |
| # write extra code if *_BS says so | |
| print $bs $DynaLoader::bscode if $DynaLoader::bscode; | |
| print $bs "\n1;\n"; | |
| close $bs; | |
| } | |
| } | |
| 1; | |
| __END__ | |
| =head1 NAME | |
| ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader | |
| =head1 SYNOPSIS | |
| Mkbootstrap | |
| =head1 DESCRIPTION | |
| Mkbootstrap typically gets called from an extension Makefile. | |
| There is no C<*.bs> file supplied with the extension. Instead, there may | |
| be a C<*_BS> file which has code for the special cases, like posix for | |
| berkeley db on the NeXT. | |
| This file will get parsed, and produce a maybe empty | |
| C<@DynaLoader::dl_resolve_using> array for the current architecture. | |
| That will be extended by $BSLOADLIBS, which was computed by | |
| ExtUtils::Liblist::ext(). If this array still is empty, we do nothing, | |
| else we write a .bs file with an C<@DynaLoader::dl_resolve_using> | |
| array. | |
| The C<*_BS> file can put some code into the generated C<*.bs> file by | |
| placing it in C<$bscode>. This is a handy 'escape' mechanism that may | |
| prove useful in complex situations. | |
| If @DynaLoader::dl_resolve_using contains C<-L*> or C<-l*> entries then | |
| Mkbootstrap will automatically add a dl_findfile() call to the | |
| generated C<*.bs> file. | |
| =cut | |