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1 | package ExtUtils::Mkbootstrap; |
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2 | |
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3 | # There's just too much Dynaloader incest here to turn on strict vars. |
4 | use strict 'refs'; |
5 | |
6 | use vars qw($VERSION @ISA @EXPORT); |
7 | $VERSION = '1.17'; |
8 | |
9 | require Exporter; |
10 | @ISA = ('Exporter'); |
11 | @EXPORT = ('&Mkbootstrap'); |
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12 | |
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13 | use Config; |
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14 | |
15 | use vars qw($Verbose); |
16 | |
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17 | |
18 | sub Mkbootstrap { |
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19 | my($baseext, @bsloadlibs)=@_; |
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20 | @bsloadlibs = grep($_, @bsloadlibs); # strip empty libs |
21 | |
22 | print STDOUT " bsloadlibs=@bsloadlibs\n" if $Verbose; |
23 | |
24 | # We need DynaLoader here because we and/or the *_BS file may |
25 | # call dl_findfile(). We don't say `use' here because when |
26 | # first building perl extensions the DynaLoader will not have |
27 | # been built when MakeMaker gets first used. |
28 | require DynaLoader; |
29 | |
30 | rename "$baseext.bs", "$baseext.bso" |
31 | if -s "$baseext.bs"; |
32 | |
33 | if (-f "${baseext}_BS"){ |
34 | $_ = "${baseext}_BS"; |
35 | package DynaLoader; # execute code as if in DynaLoader |
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36 | local($osname, $dlsrc) = (); # avoid warnings |
37 | ($osname, $dlsrc) = @Config::Config{qw(osname dlsrc)}; |
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38 | $bscode = ""; |
39 | unshift @INC, "."; |
40 | require $_; |
41 | shift @INC; |
42 | } |
43 | |
44 | if ($Config{'dlsrc'} =~ /^dl_dld/){ |
45 | package DynaLoader; |
46 | push(@dl_resolve_using, dl_findfile('-lc')); |
47 | } |
48 | |
49 | my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using); |
50 | my($method) = ''; |
51 | if (@all){ |
52 | open BS, ">$baseext.bs" |
53 | or die "Unable to open $baseext.bs: $!"; |
54 | print STDOUT "Writing $baseext.bs\n"; |
55 | print STDOUT " containing: @all" if $Verbose; |
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56 | print BS "# $baseext DynaLoader bootstrap file for $^O architecture.\n"; |
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57 | print BS "# Do not edit this file, changes will be lost.\n"; |
58 | print BS "# This file was automatically generated by the\n"; |
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59 | print BS "# Mkbootstrap routine in ExtUtils::Mkbootstrap (v$VERSION).\n"; |
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60 | print BS "\@DynaLoader::dl_resolve_using = "; |
61 | # If @all contains names in the form -lxxx or -Lxxx then it's asking for |
62 | # runtime library location so we automatically add a call to dl_findfile() |
63 | if (" @all" =~ m/ -[lLR]/){ |
64 | print BS " dl_findfile(qw(\n @all\n ));\n"; |
65 | }else{ |
66 | print BS " qw(@all);\n"; |
67 | } |
68 | # write extra code if *_BS says so |
69 | print BS $DynaLoader::bscode if $DynaLoader::bscode; |
70 | print BS "\n1;\n"; |
71 | close BS; |
72 | } |
73 | } |
74 | |
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75 | 1; |
76 | |
77 | __END__ |
78 | |
79 | =head1 NAME |
80 | |
81 | ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader |
82 | |
83 | =head1 SYNOPSIS |
84 | |
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85 | C<Mkbootstrap> |
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86 | |
87 | =head1 DESCRIPTION |
88 | |
89 | Mkbootstrap typically gets called from an extension Makefile. |
90 | |
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91 | There is no C<*.bs> file supplied with the extension. Instead, there may |
92 | be a C<*_BS> file which has code for the special cases, like posix for |
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93 | berkeley db on the NeXT. |
94 | |
95 | This file will get parsed, and produce a maybe empty |
96 | C<@DynaLoader::dl_resolve_using> array for the current architecture. |
97 | That will be extended by $BSLOADLIBS, which was computed by |
98 | ExtUtils::Liblist::ext(). If this array still is empty, we do nothing, |
99 | else we write a .bs file with an C<@DynaLoader::dl_resolve_using> |
100 | array. |
101 | |
102 | The C<*_BS> file can put some code into the generated C<*.bs> file by |
103 | placing it in C<$bscode>. This is a handy 'escape' mechanism that may |
104 | prove useful in complex situations. |
105 | |
106 | If @DynaLoader::dl_resolve_using contains C<-L*> or C<-l*> entries then |
107 | Mkbootstrap will automatically add a dl_findfile() call to the |
108 | generated C<*.bs> file. |
109 | |
110 | =cut |