| 1 | package ExtUtils::Mkbootstrap; |
| 2 | |
| 3 | $VERSION = 1.15; |
| 4 | |
| 5 | use Config; |
| 6 | use Exporter; |
| 7 | @ISA=('Exporter'); |
| 8 | @EXPORT='&Mkbootstrap'; |
| 9 | |
| 10 | sub Mkbootstrap { |
| 11 | my($baseext, @bsloadlibs)=@_; |
| 12 | @bsloadlibs = grep($_, @bsloadlibs); # strip empty libs |
| 13 | |
| 14 | print STDOUT " bsloadlibs=@bsloadlibs\n" if $Verbose; |
| 15 | |
| 16 | # We need DynaLoader here because we and/or the *_BS file may |
| 17 | # call dl_findfile(). We don't say `use' here because when |
| 18 | # first building perl extensions the DynaLoader will not have |
| 19 | # been built when MakeMaker gets first used. |
| 20 | require DynaLoader; |
| 21 | |
| 22 | rename "$baseext.bs", "$baseext.bso" |
| 23 | if -s "$baseext.bs"; |
| 24 | |
| 25 | if (-f "${baseext}_BS"){ |
| 26 | $_ = "${baseext}_BS"; |
| 27 | package DynaLoader; # execute code as if in DynaLoader |
| 28 | local($osname, $dlsrc) = (); # avoid warnings |
| 29 | ($osname, $dlsrc) = @Config::Config{qw(osname dlsrc)}; |
| 30 | $bscode = ""; |
| 31 | unshift @INC, "."; |
| 32 | require $_; |
| 33 | shift @INC; |
| 34 | } |
| 35 | |
| 36 | if ($Config{'dlsrc'} =~ /^dl_dld/){ |
| 37 | package DynaLoader; |
| 38 | push(@dl_resolve_using, dl_findfile('-lc')); |
| 39 | } |
| 40 | |
| 41 | my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using); |
| 42 | my($method) = ''; |
| 43 | if (@all){ |
| 44 | open BS, ">$baseext.bs" |
| 45 | or die "Unable to open $baseext.bs: $!"; |
| 46 | print STDOUT "Writing $baseext.bs\n"; |
| 47 | print STDOUT " containing: @all" if $Verbose; |
| 48 | print BS "# $baseext DynaLoader bootstrap file for $^O architecture.\n"; |
| 49 | print BS "# Do not edit this file, changes will be lost.\n"; |
| 50 | print BS "# This file was automatically generated by the\n"; |
| 51 | print BS "# Mkbootstrap routine in ExtUtils::Mkbootstrap (v$VERSION).\n"; |
| 52 | print BS "\@DynaLoader::dl_resolve_using = "; |
| 53 | # If @all contains names in the form -lxxx or -Lxxx then it's asking for |
| 54 | # runtime library location so we automatically add a call to dl_findfile() |
| 55 | if (" @all" =~ m/ -[lLR]/){ |
| 56 | print BS " dl_findfile(qw(\n @all\n ));\n"; |
| 57 | }else{ |
| 58 | print BS " qw(@all);\n"; |
| 59 | } |
| 60 | # write extra code if *_BS says so |
| 61 | print BS $DynaLoader::bscode if $DynaLoader::bscode; |
| 62 | print BS "\n1;\n"; |
| 63 | close BS; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | 1; |
| 68 | |
| 69 | __END__ |
| 70 | |
| 71 | =head1 NAME |
| 72 | |
| 73 | ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader |
| 74 | |
| 75 | =head1 SYNOPSIS |
| 76 | |
| 77 | C<Mkbootstrap> |
| 78 | |
| 79 | =head1 DESCRIPTION |
| 80 | |
| 81 | Mkbootstrap typically gets called from an extension Makefile. |
| 82 | |
| 83 | There is no C<*.bs> file supplied with the extension. Instead, there may |
| 84 | be a C<*_BS> file which has code for the special cases, like posix for |
| 85 | berkeley db on the NeXT. |
| 86 | |
| 87 | This file will get parsed, and produce a maybe empty |
| 88 | C<@DynaLoader::dl_resolve_using> array for the current architecture. |
| 89 | That will be extended by $BSLOADLIBS, which was computed by |
| 90 | ExtUtils::Liblist::ext(). If this array still is empty, we do nothing, |
| 91 | else we write a .bs file with an C<@DynaLoader::dl_resolve_using> |
| 92 | array. |
| 93 | |
| 94 | The C<*_BS> file can put some code into the generated C<*.bs> file by |
| 95 | placing it in C<$bscode>. This is a handy 'escape' mechanism that may |
| 96 | prove useful in complex situations. |
| 97 | |
| 98 | If @DynaLoader::dl_resolve_using contains C<-L*> or C<-l*> entries then |
| 99 | Mkbootstrap will automatically add a dl_findfile() call to the |
| 100 | generated C<*.bs> file. |
| 101 | |
| 102 | =cut |