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1 | # $Id: Embed.pm,v 1.2501 $ |
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2 | require 5.002; |
3 | |
4 | package ExtUtils::Embed; |
5 | require Exporter; |
6 | require FileHandle; |
7 | use Config; |
8 | use Getopt::Std; |
9bbedd82 |
9 | use File::Spec; |
a2c6f8f1 |
10 | |
11 | #Only when we need them |
12 | #require ExtUtils::MakeMaker; |
13 | #require ExtUtils::Liblist; |
14 | |
15 | use vars qw(@ISA @EXPORT $VERSION |
16 | @Extensions $Verbose $lib_ext |
17 | $opt_o $opt_s |
18 | ); |
19 | use strict; |
20 | |
88d01e8d |
21 | $VERSION = sprintf("%d.%02d", q$Revision: 1.2506_00 $ =~ /(\d+)\.(\d+)/); |
a2c6f8f1 |
22 | |
23 | @ISA = qw(Exporter); |
24 | @EXPORT = qw(&xsinit &ldopts |
25 | &ccopts &ccflags &ccdlflags &perl_inc |
26 | &xsi_header &xsi_protos &xsi_body); |
27 | |
28 | #let's have Miniperl borrow from us instead |
29 | #require ExtUtils::Miniperl; |
30 | #*canon = \&ExtUtils::Miniperl::canon; |
31 | |
32 | $Verbose = 0; |
33 | $lib_ext = $Config{lib_ext} || '.a'; |
34 | |
7e24002c |
35 | sub is_cmd { $0 eq '-e' } |
36 | |
37 | sub my_return { |
38 | my $val = shift; |
39 | if(is_cmd) { |
40 | print $val; |
41 | } |
42 | else { |
43 | return $val; |
44 | } |
45 | } |
46 | |
a2c6f8f1 |
47 | sub xsinit { |
48 | my($file, $std, $mods) = @_; |
49 | my($fh,@mods,%seen); |
50 | $file ||= "perlxsi.c"; |
acfe0abc |
51 | my $xsinit_proto = "pTHX"; |
a2c6f8f1 |
52 | |
53 | if (@_) { |
54 | @mods = @$mods if $mods; |
55 | } |
56 | else { |
57 | getopts('o:s:'); |
58 | $file = $opt_o if defined $opt_o; |
59 | $std = $opt_s if defined $opt_s; |
60 | @mods = @ARGV; |
61 | } |
62 | $std = 1 unless scalar @mods; |
63 | |
64 | if ($file eq "STDOUT") { |
65 | $fh = \*STDOUT; |
66 | } |
67 | else { |
68 | $fh = new FileHandle "> $file"; |
69 | } |
70 | |
71 | push(@mods, static_ext()) if defined $std; |
72 | @mods = grep(!$seen{$_}++, @mods); |
73 | |
74 | print $fh &xsi_header(); |
20ce7b12 |
75 | print $fh "EXTERN_C void xs_init ($xsinit_proto);\n\n"; |
a2c6f8f1 |
76 | print $fh &xsi_protos(@mods); |
77 | |
8bdb6b78 |
78 | print $fh "\nEXTERN_C void\nxs_init($xsinit_proto)\n{\n"; |
a2c6f8f1 |
79 | print $fh &xsi_body(@mods); |
80 | print $fh "}\n"; |
81 | |
82 | } |
83 | |
84 | sub xsi_header { |
85 | return <<EOF; |
a2c6f8f1 |
86 | #include <EXTERN.h> |
87 | #include <perl.h> |
a2c6f8f1 |
88 | |
89 | EOF |
90 | } |
91 | |
92 | sub xsi_protos { |
93 | my(@exts) = @_; |
94 | my(@retval,%seen); |
acfe0abc |
95 | my $boot_proto = "pTHX_ CV* cv"; |
a2c6f8f1 |
96 | foreach $_ (@exts){ |
97 | my($pname) = canon('/', $_); |
98 | my($mname, $cname); |
99 | ($mname = $pname) =~ s!/!::!g; |
100 | ($cname = $pname) =~ s!/!__!g; |
20ce7b12 |
101 | my($ccode) = "EXTERN_C void boot_${cname} ($boot_proto);\n"; |
a2c6f8f1 |
102 | next if $seen{$ccode}++; |
103 | push(@retval, $ccode); |
104 | } |
105 | return join '', @retval; |
106 | } |
107 | |
108 | sub xsi_body { |
109 | my(@exts) = @_; |
110 | my($pname,@retval,%seen); |
111 | my($dl) = canon('/','DynaLoader'); |
a3c8358c |
112 | push(@retval, "\tchar *file = __FILE__;\n"); |
a2c6f8f1 |
113 | push(@retval, "\tdXSUB_SYS;\n") if $] > 5.002; |
a3c8358c |
114 | push(@retval, "\n"); |
a2c6f8f1 |
115 | |
116 | foreach $_ (@exts){ |
117 | my($pname) = canon('/', $_); |
118 | my($mname, $cname, $ccode); |
119 | ($mname = $pname) =~ s!/!::!g; |
120 | ($cname = $pname) =~ s!/!__!g; |
121 | if ($pname eq $dl){ |
122 | # Must NOT install 'DynaLoader::boot_DynaLoader' as 'bootstrap'! |
123 | # boot_DynaLoader is called directly in DynaLoader.pm |
124 | $ccode = "\t/* DynaLoader is a special case */\n\tnewXS(\"${mname}::boot_${cname}\", boot_${cname}, file);\n"; |
125 | push(@retval, $ccode) unless $seen{$ccode}++; |
126 | } else { |
127 | $ccode = "\tnewXS(\"${mname}::bootstrap\", boot_${cname}, file);\n"; |
128 | push(@retval, $ccode) unless $seen{$ccode}++; |
129 | } |
130 | } |
131 | return join '', @retval; |
132 | } |
133 | |
134 | sub static_ext { |
135 | unless (scalar @Extensions) { |
136 | @Extensions = sort split /\s+/, $Config{static_ext}; |
137 | unshift @Extensions, qw(DynaLoader); |
138 | } |
139 | @Extensions; |
140 | } |
141 | |
142 | sub ldopts { |
143 | require ExtUtils::MakeMaker; |
144 | require ExtUtils::Liblist; |
145 | my($std,$mods,$link_args,$path) = @_; |
146 | my(@mods,@link_args,@argv); |
147 | my($dllib,$config_libs,@potential_libs,@path); |
148 | local($") = ' ' unless $" eq ' '; |
a2c6f8f1 |
149 | if (scalar @_) { |
150 | @link_args = @$link_args if $link_args; |
151 | @mods = @$mods if $mods; |
152 | } |
153 | else { |
154 | @argv = @ARGV; |
155 | #hmm |
156 | while($_ = shift @argv) { |
157 | /^-std$/ && do { $std = 1; next; }; |
158 | /^--$/ && do { @link_args = @argv; last; }; |
159 | /^-I(.*)/ && do { $path = $1 || shift @argv; next; }; |
160 | push(@mods, $_); |
161 | } |
162 | } |
163 | $std = 1 unless scalar @link_args; |
9bbedd82 |
164 | my $sep = $Config{path_sep} || ':'; |
165 | @path = $path ? split(/\Q$sep/, $path) : @INC; |
a2c6f8f1 |
166 | |
167 | push(@potential_libs, @link_args) if scalar @link_args; |
9bbedd82 |
168 | # makemaker includes std libs on windows by default |
169 | if ($^O ne 'MSWin32' and defined($std)) { |
170 | push(@potential_libs, $Config{perllibs}); |
171 | } |
a2c6f8f1 |
172 | |
173 | push(@mods, static_ext()) if $std; |
174 | |
175 | my($mod,@ns,$root,$sub,$extra,$archive,@archives); |
176 | print STDERR "Searching (@path) for archives\n" if $Verbose; |
177 | foreach $mod (@mods) { |
3ab83790 |
178 | @ns = split(/::|\/|\\/, $mod); |
a2c6f8f1 |
179 | $sub = $ns[-1]; |
56c2fb36 |
180 | $root = File::Spec->catdir(@ns); |
a2c6f8f1 |
181 | |
182 | print STDERR "searching for '$sub${lib_ext}'\n" if $Verbose; |
183 | foreach (@path) { |
56c2fb36 |
184 | next unless -e ($archive = File::Spec->catdir($_,"auto",$root,"$sub$lib_ext")); |
a2c6f8f1 |
185 | push @archives, $archive; |
56c2fb36 |
186 | if(-e ($extra = File::Spec->catdir($_,"auto",$root,"extralibs.ld"))) { |
a2c6f8f1 |
187 | local(*FH); |
188 | if(open(FH, $extra)) { |
189 | my($libs) = <FH>; chomp $libs; |
190 | push @potential_libs, split /\s+/, $libs; |
191 | } |
192 | else { |
193 | warn "Couldn't open '$extra'"; |
194 | } |
195 | } |
196 | last; |
197 | } |
198 | } |
199 | #print STDERR "\@potential_libs = @potential_libs\n"; |
200 | |
9bbedd82 |
201 | my $libperl; |
202 | if ($^O eq 'MSWin32') { |
203 | $libperl = $Config{libperl}; |
204 | } |
205 | else { |
206 | $libperl = (grep(/^-l\w*perl\w*$/, @link_args))[0] || "-lperl"; |
207 | } |
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208 | |
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209 | my $lpath = File::Spec->catdir($Config{archlibexp}, 'CORE'); |
210 | $lpath = qq["$lpath"] if $^O eq 'MSWin32'; |
a2c6f8f1 |
211 | my($extralibs, $bsloadlibs, $ldloadlibs, $ld_run_path) = |
5de3f0da |
212 | MM->ext(join ' ', "-L$lpath", $libperl, @potential_libs); |
a2c6f8f1 |
213 | |
214 | my $ld_or_bs = $bsloadlibs || $ldloadlibs; |
215 | print STDERR "bs: $bsloadlibs ** ld: $ldloadlibs" if $Verbose; |
f86702cc |
216 | my $linkage = "$Config{ccdlflags} $Config{ldflags} @archives $ld_or_bs"; |
a2c6f8f1 |
217 | print STDERR "ldopts: '$linkage'\n" if $Verbose; |
218 | |
219 | return $linkage if scalar @_; |
7e24002c |
220 | my_return("$linkage\n"); |
a2c6f8f1 |
221 | } |
222 | |
223 | sub ccflags { |
7e24002c |
224 | my_return(" $Config{ccflags} "); |
a2c6f8f1 |
225 | } |
226 | |
227 | sub ccdlflags { |
7e24002c |
228 | my_return(" $Config{ccdlflags} "); |
a2c6f8f1 |
229 | } |
230 | |
231 | sub perl_inc { |
9bbedd82 |
232 | my $dir = File::Spec->catdir($Config{archlibexp}, 'CORE'); |
233 | $dir = qq["$dir"] if $^O eq 'MSWin32'; |
234 | my_return(" -I$dir "); |
a2c6f8f1 |
235 | } |
236 | |
237 | sub ccopts { |
7e24002c |
238 | ccflags . perl_inc; |
a2c6f8f1 |
239 | } |
240 | |
241 | sub canon { |
242 | my($as, @ext) = @_; |
243 | foreach(@ext) { |
244 | # might be X::Y or lib/auto/X/Y/Y.a |
245 | next if s!::!/!g; |
246 | s:^(lib|ext)/(auto/)?::; |
247 | s:/\w+\.\w+$::; |
248 | } |
249 | grep(s:/:$as:, @ext) if ($as ne '/'); |
250 | @ext; |
251 | } |
252 | |
253 | __END__ |
254 | |
255 | =head1 NAME |
256 | |
257 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications |
258 | |
259 | =head1 SYNOPSIS |
260 | |
261 | |
262 | perl -MExtUtils::Embed -e xsinit |
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263 | perl -MExtUtils::Embed -e ccopts |
a2c6f8f1 |
264 | perl -MExtUtils::Embed -e ldopts |
265 | |
266 | =head1 DESCRIPTION |
267 | |
268 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter |
269 | and extensions in your C/C++ applications. |
270 | Typically, an application B<Makefile> will invoke ExtUtils::Embed |
271 | functions while building your application. |
272 | |
273 | =head1 @EXPORT |
274 | |
275 | ExtUtils::Embed exports the following functions: |
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276 | |
4e864201 |
277 | xsinit(), ldopts(), ccopts(), perl_inc(), ccflags(), |
278 | ccdlflags(), xsi_header(), xsi_protos(), xsi_body() |
a2c6f8f1 |
279 | |
280 | =head1 FUNCTIONS |
281 | |
bbc7dcd2 |
282 | =over 4 |
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283 | |
a2c6f8f1 |
284 | =item xsinit() |
285 | |
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286 | Generate C/C++ code for the XS initializer function. |
a2c6f8f1 |
287 | |
288 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`> |
289 | the following options are recognized: |
290 | |
4e864201 |
291 | B<-o> E<lt>output filenameE<gt> (Defaults to B<perlxsi.c>) |
a2c6f8f1 |
292 | |
293 | B<-o STDOUT> will print to STDOUT. |
294 | |
295 | B<-std> (Write code for extensions that are linked with the current Perl.) |
296 | |
297 | Any additional arguments are expected to be names of modules |
298 | to generate code for. |
299 | |
300 | When invoked with parameters the following are accepted and optional: |
301 | |
302 | C<xsinit($filename,$std,[@modules])> |
303 | |
304 | Where, |
305 | |
306 | B<$filename> is equivalent to the B<-o> option. |
307 | |
308 | B<$std> is boolean, equivalent to the B<-std> option. |
309 | |
310 | B<[@modules]> is an array ref, same as additional arguments mentioned above. |
311 | |
312 | =item Examples |
313 | |
a6006777 |
314 | |
a2c6f8f1 |
315 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket |
316 | |
317 | |
318 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function |
a7665c5e |
319 | to the C B<boot_Socket> function and writes it to a file named F<xsinit.c>. |
a2c6f8f1 |
320 | |
321 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly. |
322 | |
323 | perl -MExtUtils::Embed -e xsinit |
324 | |
325 | |
326 | This will generate code for linking with B<DynaLoader> and |
327 | each static extension found in B<$Config{static_ext}>. |
328 | The code is written to the default file name B<perlxsi.c>. |
329 | |
330 | |
331 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle |
332 | |
333 | |
334 | Here, code is written for all the currently linked extensions along with code |
335 | for B<DBI> and B<DBD::Oracle>. |
336 | |
337 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any |
338 | other extensions. |
339 | |
340 | =item ldopts() |
341 | |
342 | Output arguments for linking the Perl library and extensions to your |
343 | application. |
344 | |
345 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`> |
346 | the following options are recognized: |
347 | |
348 | B<-std> |
349 | |
350 | Output arguments for linking the Perl library and any extensions linked |
351 | with the current Perl. |
352 | |
4e864201 |
353 | B<-I> E<lt>path1:path2E<gt> |
a2c6f8f1 |
354 | |
355 | Search path for ModuleName.a archives. |
356 | Default path is B<@INC>. |
357 | Library archives are expected to be found as |
358 | B</some/path/auto/ModuleName/ModuleName.a> |
359 | For example, when looking for B<Socket.a> relative to a search path, |
360 | we should find B<auto/Socket/Socket.a> |
361 | |
362 | When looking for B<DBD::Oracle> relative to a search path, |
363 | we should find B<auto/DBD/Oracle/Oracle.a> |
364 | |
a7665c5e |
365 | Keep in mind that you can always supply B</my/own/path/ModuleName.a> |
a2c6f8f1 |
366 | as an additional linker argument. |
367 | |
4e864201 |
368 | B<--> E<lt>list of linker argsE<gt> |
a2c6f8f1 |
369 | |
370 | Additional linker arguments to be considered. |
371 | |
372 | Any additional arguments found before the B<--> token |
373 | are expected to be names of modules to generate code for. |
374 | |
375 | When invoked with parameters the following are accepted and optional: |
376 | |
377 | C<ldopts($std,[@modules],[@link_args],$path)> |
378 | |
a7665c5e |
379 | Where: |
a2c6f8f1 |
380 | |
381 | B<$std> is boolean, equivalent to the B<-std> option. |
382 | |
383 | B<[@modules]> is equivalent to additional arguments found before the B<--> token. |
384 | |
385 | B<[@link_args]> is equivalent to arguments found after the B<--> token. |
386 | |
387 | B<$path> is equivalent to the B<-I> option. |
388 | |
389 | In addition, when ldopts is called with parameters, it will return the argument string |
390 | rather than print it to STDOUT. |
391 | |
392 | =item Examples |
393 | |
394 | |
395 | perl -MExtUtils::Embed -e ldopts |
396 | |
397 | |
398 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and |
399 | extensions found in B<$Config{static_ext}>. This includes libraries |
400 | found in B<$Config{libs}> and the first ModuleName.a library |
401 | for each extension that is found by searching B<@INC> or the path |
de592821 |
402 | specified by the B<-I> option. |
a2c6f8f1 |
403 | In addition, when ModuleName.a is found, additional linker arguments |
404 | are picked up from the B<extralibs.ld> file in the same directory. |
405 | |
406 | |
407 | perl -MExtUtils::Embed -e ldopts -- -std Socket |
a6006777 |
408 | |
a2c6f8f1 |
409 | |
410 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension. |
411 | |
412 | |
413 | perl -MExtUtils::Embed -e ldopts -- DynaLoader |
414 | |
415 | |
416 | This will print arguments for linking with just the B<DynaLoader> extension |
417 | and B<libperl.a>. |
418 | |
419 | |
420 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql |
421 | |
422 | |
423 | Any arguments after the second '--' token are additional linker |
424 | arguments that will be examined for potential conflict. If there is no |
425 | conflict, the additional arguments will be part of the output. |
426 | |
427 | |
428 | =item perl_inc() |
429 | |
430 | For including perl header files this function simply prints: |
431 | |
36477c24 |
432 | -I$Config{archlibexp}/CORE |
a2c6f8f1 |
433 | |
434 | So, rather than having to say: |
435 | |
36477c24 |
436 | perl -MConfig -e 'print "-I$Config{archlibexp}/CORE"' |
a2c6f8f1 |
437 | |
438 | Just say: |
439 | |
440 | perl -MExtUtils::Embed -e perl_inc |
441 | |
442 | =item ccflags(), ccdlflags() |
443 | |
444 | These functions simply print $Config{ccflags} and $Config{ccdlflags} |
445 | |
446 | =item ccopts() |
447 | |
448 | This function combines perl_inc(), ccflags() and ccdlflags() into one. |
449 | |
450 | =item xsi_header() |
451 | |
452 | This function simply returns a string defining the same B<EXTERN_C> macro as |
453 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>. |
454 | |
455 | =item xsi_protos(@modules) |
456 | |
457 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules. |
458 | |
459 | =item xsi_body(@modules) |
460 | |
461 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap> |
462 | function to B<boot_ModuleName> for each @modules. |
463 | |
022735b4 |
464 | B<xsinit()> uses the xsi_* functions to generate most of its code. |
a2c6f8f1 |
465 | |
2ae324a7 |
466 | =back |
467 | |
a2c6f8f1 |
468 | =head1 EXAMPLES |
469 | |
470 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications |
0325b4c4 |
471 | with embedded perl, see L<perlembed>. |
a6006777 |
472 | |
a2c6f8f1 |
473 | =head1 SEE ALSO |
474 | |
4e864201 |
475 | L<perlembed> |
a2c6f8f1 |
476 | |
477 | =head1 AUTHOR |
478 | |
4e864201 |
479 | Doug MacEachern E<lt>F<dougm@osf.org>E<gt> |
a2c6f8f1 |
480 | |
4e864201 |
481 | Based on ideas from Tim Bunce E<lt>F<Tim.Bunce@ig.co.uk>E<gt> and |
482 | B<minimod.pl> by Andreas Koenig E<lt>F<k@anna.in-berlin.de>E<gt> and Tim Bunce. |
a2c6f8f1 |
483 | |
484 | =cut |
485 | |