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1 | package ExtUtils::Mksymlists; |
2 | use strict qw[ subs refs ]; |
3 | # no strict 'vars'; # until filehandles are exempted |
4 | |
5 | use Carp; |
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6 | use Exporter; |
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7 | use vars qw( @ISA @EXPORT $VERSION ); |
8 | @ISA = 'Exporter'; |
9 | @EXPORT = '&Mksymlists'; |
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10 | $VERSION = substr q$Revision: 1.13 $, 10; |
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11 | |
12 | sub Mksymlists { |
13 | my(%spec) = @_; |
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14 | my($osname) = $^O; |
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15 | |
16 | croak("Insufficient information specified to Mksymlists") |
17 | unless ( $spec{NAME} or |
18 | ($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) ); |
19 | |
20 | $spec{DL_VARS} = [] unless $spec{DL_VARS}; |
21 | ($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE}; |
22 | $spec{DL_FUNCS} = { $spec{NAME} => [] } |
23 | unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or |
24 | $spec{FUNCLIST}); |
25 | $spec{FUNCLIST} = [] unless $spec{FUNCLIST}; |
26 | if (defined $spec{DL_FUNCS}) { |
27 | my($package); |
28 | foreach $package (keys %{$spec{DL_FUNCS}}) { |
29 | my($packprefix,$sym,$bootseen); |
30 | ($packprefix = $package) =~ s/\W/_/g; |
31 | foreach $sym (@{$spec{DL_FUNCS}->{$package}}) { |
32 | if ($sym =~ /^boot_/) { |
33 | push(@{$spec{FUNCLIST}},$sym); |
34 | $bootseen++; |
35 | } |
36 | else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); } |
37 | } |
38 | push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen; |
39 | } |
40 | } |
41 | |
42 | # We'll need this if we ever add any OS which uses mod2fname |
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43 | # not as pseudo-builtin. |
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44 | # require DynaLoader; |
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45 | if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) { |
46 | $spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]); |
47 | } |
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48 | |
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49 | if ($osname eq 'aix') { _write_aix(\%spec); } |
50 | elsif ($osname eq 'VMS') { _write_vms(\%spec) } |
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51 | elsif ($osname eq 'os2') { _write_os2(\%spec) } |
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52 | else { croak("Don't know how to create linker option file for $osname\n"); } |
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53 | } |
54 | |
55 | |
56 | sub _write_aix { |
57 | my($data) = @_; |
58 | |
59 | rename "$data->{FILE}.exp", "$data->{FILE}.exp_old"; |
60 | |
61 | open(EXP,">$data->{FILE}.exp") |
62 | or croak("Can't create $data->{FILE}.exp: $!\n"); |
63 | print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}}; |
64 | print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}}; |
65 | close EXP; |
66 | } |
67 | |
68 | |
69 | sub _write_os2 { |
70 | my($data) = @_; |
71 | |
72 | if (not $data->{DLBASE}) { |
73 | ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://; |
74 | $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_'; |
75 | } |
76 | rename "$data->{FILE}.def", "$data->{FILE}_def.old"; |
77 | |
78 | open(DEF,">$data->{FILE}.def") |
79 | or croak("Can't create $data->{FILE}.def: $!\n"); |
80 | print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n"; |
81 | print DEF "CODE LOADONCALL\n"; |
82 | print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n"; |
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83 | print DEF "EXPORTS\n "; |
84 | print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}}; |
85 | print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}}; |
86 | if (%{$data->{IMPORTS}}) { |
87 | print DEF "IMPORTS\n"; |
88 | my ($name, $exp); |
89 | while (($name, $exp)= each %{$data->{IMPORTS}}) { |
90 | print DEF " $name=$exp\n"; |
91 | } |
92 | } |
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93 | close DEF; |
94 | } |
95 | |
96 | |
97 | sub _write_vms { |
98 | my($data) = @_; |
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99 | |
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100 | require Config; # a reminder for once we do $^O |
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101 | require ExtUtils::XSSymSet; |
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102 | |
103 | my($isvax) = $Config::Config{'arch'} =~ /VAX/i; |
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104 | my($set) = new ExtUtils::XSSymSet; |
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105 | my($sym); |
106 | |
107 | rename "$data->{FILE}.opt", "$data->{FILE}.opt_old"; |
108 | |
109 | open(OPT,">$data->{FILE}.opt") |
110 | or croak("Can't create $data->{FILE}.opt: $!\n"); |
111 | |
112 | # Options file declaring universal symbols |
113 | # Used when linking shareable image for dynamic extension, |
114 | # or when linking PerlShr into which we've added this package |
115 | # as a static extension |
116 | # We don't do anything to preserve order, so we won't relax |
117 | # the GSMATCH criteria for a dynamic extension |
118 | |
119 | foreach $sym (@{$data->{FUNCLIST}}) { |
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120 | my $safe = $set->addsym($sym); |
121 | if ($isvax) { print OPT "UNIVERSAL=$safe\n" } |
122 | else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; } |
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123 | } |
124 | foreach $sym (@{$data->{DL_VARS}}) { |
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125 | my $safe = $set->addsym($sym); |
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126 | print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n"; |
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127 | if ($isvax) { print OPT "UNIVERSAL=$safe\n" } |
128 | else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; } |
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129 | } |
130 | close OPT; |
131 | |
132 | # Options file specifying RTLs to which this extension must be linked. |
133 | # Eventually, the list of libraries will be supplied by a working |
134 | # extliblist routine. |
135 | open OPT,'>rtls.opt'; |
136 | print OPT "PerlShr/Share\n"; |
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137 | foreach $rtl (split(/\s+/,$Config::Config{'libs'})) { print OPT "$rtl\n"; } |
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138 | close OPT; |
139 | } |
140 | |
141 | 1; |
142 | |
143 | __END__ |
144 | |
145 | =head1 NAME |
146 | |
147 | ExtUtils::Mksymlists - write linker options files for dynamic extension |
148 | |
149 | =head1 SYNOPSIS |
150 | |
151 | use ExtUtils::Mksymlists; |
152 | Mksymlists({ NAME => $name , |
153 | DL_VARS => [ $var1, $var2, $var3 ], |
154 | DL_FUNCS => { $pkg1 => [ $func1, $func2 ], |
155 | $pkg2 => [ $func3 ] }); |
156 | |
157 | =head1 DESCRIPTION |
158 | |
159 | C<ExtUtils::Mksymlists> produces files used by the linker under some OSs |
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160 | during the creation of shared libraries for dynamic extensions. It is |
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161 | normally called from a MakeMaker-generated Makefile when the extension |
162 | is built. The linker option file is generated by calling the function |
163 | C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>. |
164 | It takes one argument, a list of key-value pairs, in which the following |
165 | keys are recognized: |
166 | |
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167 | =over |
168 | |
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169 | =item NAME |
170 | |
171 | This gives the name of the extension (I<e.g.> Tk::Canvas) for which |
172 | the linker option file will be produced. |
173 | |
174 | =item DL_FUNCS |
175 | |
176 | This is identical to the DL_FUNCS attribute available via MakeMaker, |
177 | from which it is usually taken. Its value is a reference to an |
178 | associative array, in which each key is the name of a package, and |
179 | each value is an a reference to an array of function names which |
180 | should be exported by the extension. For instance, one might say |
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181 | C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ], |
182 | Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The |
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183 | function names should be identical to those in the XSUB code; |
184 | C<Mksymlists> will alter the names written to the linker option |
185 | file to match the changes made by F<xsubpp>. In addition, if |
186 | none of the functions in a list begin with the string B<boot_>, |
187 | C<Mksymlists> will add a bootstrap function for that package, |
188 | just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is |
189 | present in the list, it is passed through unchanged.) If |
190 | DL_FUNCS is not specified, it defaults to the bootstrap |
191 | function for the extension specified in NAME. |
192 | |
193 | =item DL_VARS |
194 | |
195 | This is identical to the DL_VARS attribute available via MakeMaker, |
196 | and, like DL_FUNCS, it is usually specified via MakeMaker. Its |
197 | value is a reference to an array of variable names which should |
198 | be exported by the extension. |
199 | |
200 | =item FILE |
201 | |
202 | This key can be used to specify the name of the linker option file |
203 | (minus the OS-specific extension), if for some reason you do not |
204 | want to use the default value, which is the last word of the NAME |
205 | attribute (I<e.g.> for Tk::Canvas, FILE defaults to 'Canvas'). |
206 | |
207 | =item FUNCLIST |
208 | |
209 | This provides an alternate means to specify function names to be |
210 | exported from the extension. Its value is a reference to an |
211 | array of function names to be exported by the extension. These |
212 | names are passed through unaltered to the linker options file. |
213 | |
214 | =item DLBASE |
215 | |
216 | This item specifies the name by which the linker knows the |
217 | extension, which may be different from the name of the |
218 | extension itself (for instance, some linkers add an '_' to the |
219 | name of the extension). If it is not specified, it is derived |
220 | from the NAME attribute. It is presently used only by OS2. |
221 | |
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222 | =back |
223 | |
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224 | When calling C<Mksymlists>, one should always specify the NAME |
225 | attribute. In most cases, this is all that's necessary. In |
226 | the case of unusual extensions, however, the other attributes |
227 | can be used to provide additional information to the linker. |
228 | |
229 | =head1 AUTHOR |
230 | |
231 | Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>> |
232 | |
233 | =head1 REVISION |
234 | |
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235 | Last revised 14-Feb-1996, for Perl 5.002. |