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1 | # $Id: Embed.pm,v 1.2501 $ |
a2c6f8f1 |
2 | require 5.002; |
3 | |
4 | package ExtUtils::Embed; |
5 | require Exporter; |
6 | require FileHandle; |
7 | use Config; |
8 | use Getopt::Std; |
9 | |
10 | #Only when we need them |
11 | #require ExtUtils::MakeMaker; |
12 | #require ExtUtils::Liblist; |
13 | |
14 | use vars qw(@ISA @EXPORT $VERSION |
15 | @Extensions $Verbose $lib_ext |
16 | $opt_o $opt_s |
17 | ); |
18 | use strict; |
19 | |
7e24002c |
20 | $VERSION = sprintf("%d.%02d", q$Revision: 1.2505 $ =~ /(\d+)\.(\d+)/); |
a2c6f8f1 |
21 | |
22 | @ISA = qw(Exporter); |
23 | @EXPORT = qw(&xsinit &ldopts |
24 | &ccopts &ccflags &ccdlflags &perl_inc |
25 | &xsi_header &xsi_protos &xsi_body); |
26 | |
27 | #let's have Miniperl borrow from us instead |
28 | #require ExtUtils::Miniperl; |
29 | #*canon = \&ExtUtils::Miniperl::canon; |
30 | |
31 | $Verbose = 0; |
32 | $lib_ext = $Config{lib_ext} || '.a'; |
33 | |
7e24002c |
34 | sub is_cmd { $0 eq '-e' } |
35 | |
36 | sub my_return { |
37 | my $val = shift; |
38 | if(is_cmd) { |
39 | print $val; |
40 | } |
41 | else { |
42 | return $val; |
43 | } |
44 | } |
45 | |
8bdb6b78 |
46 | sub is_perl_object { |
47 | $Config{ccflags} =~ /-DPERL_OBJECT/; |
48 | } |
49 | |
a2c6f8f1 |
50 | sub xsinit { |
51 | my($file, $std, $mods) = @_; |
52 | my($fh,@mods,%seen); |
53 | $file ||= "perlxsi.c"; |
0cb96387 |
54 | my $xsinit_proto = "pTHXo"; |
a2c6f8f1 |
55 | |
56 | if (@_) { |
57 | @mods = @$mods if $mods; |
58 | } |
59 | else { |
60 | getopts('o:s:'); |
61 | $file = $opt_o if defined $opt_o; |
62 | $std = $opt_s if defined $opt_s; |
63 | @mods = @ARGV; |
64 | } |
65 | $std = 1 unless scalar @mods; |
66 | |
67 | if ($file eq "STDOUT") { |
68 | $fh = \*STDOUT; |
69 | } |
70 | else { |
71 | $fh = new FileHandle "> $file"; |
72 | } |
73 | |
74 | push(@mods, static_ext()) if defined $std; |
75 | @mods = grep(!$seen{$_}++, @mods); |
76 | |
77 | print $fh &xsi_header(); |
20ce7b12 |
78 | print $fh "EXTERN_C void xs_init ($xsinit_proto);\n\n"; |
a2c6f8f1 |
79 | print $fh &xsi_protos(@mods); |
80 | |
8bdb6b78 |
81 | print $fh "\nEXTERN_C void\nxs_init($xsinit_proto)\n{\n"; |
a2c6f8f1 |
82 | print $fh &xsi_body(@mods); |
83 | print $fh "}\n"; |
84 | |
85 | } |
86 | |
87 | sub xsi_header { |
88 | return <<EOF; |
8bdb6b78 |
89 | #if defined(__cplusplus) && !defined(PERL_OBJECT) |
90 | #define is_cplusplus |
91 | #endif |
92 | |
93 | #ifdef is_cplusplus |
a2c6f8f1 |
94 | extern "C" { |
95 | #endif |
96 | |
97 | #include <EXTERN.h> |
98 | #include <perl.h> |
8bdb6b78 |
99 | #ifdef PERL_OBJECT |
100 | #define NO_XSLOCKS |
101 | #include <XSUB.h> |
102 | #include "win32iop.h" |
103 | #include <fcntl.h> |
104 | #include <perlhost.h> |
105 | #endif |
106 | #ifdef is_cplusplus |
a2c6f8f1 |
107 | } |
108 | # ifndef EXTERN_C |
109 | # define EXTERN_C extern "C" |
110 | # endif |
111 | #else |
112 | # ifndef EXTERN_C |
113 | # define EXTERN_C extern |
114 | # endif |
115 | #endif |
116 | |
117 | EOF |
118 | } |
119 | |
120 | sub xsi_protos { |
121 | my(@exts) = @_; |
122 | my(@retval,%seen); |
0cb96387 |
123 | my $boot_proto = "pTHXo_ CV* cv"; |
a2c6f8f1 |
124 | foreach $_ (@exts){ |
125 | my($pname) = canon('/', $_); |
126 | my($mname, $cname); |
127 | ($mname = $pname) =~ s!/!::!g; |
128 | ($cname = $pname) =~ s!/!__!g; |
20ce7b12 |
129 | my($ccode) = "EXTERN_C void boot_${cname} ($boot_proto);\n"; |
a2c6f8f1 |
130 | next if $seen{$ccode}++; |
131 | push(@retval, $ccode); |
132 | } |
133 | return join '', @retval; |
134 | } |
135 | |
136 | sub xsi_body { |
137 | my(@exts) = @_; |
138 | my($pname,@retval,%seen); |
139 | my($dl) = canon('/','DynaLoader'); |
a3c8358c |
140 | push(@retval, "\tchar *file = __FILE__;\n"); |
a2c6f8f1 |
141 | push(@retval, "\tdXSUB_SYS;\n") if $] > 5.002; |
a3c8358c |
142 | push(@retval, "\n"); |
a2c6f8f1 |
143 | |
144 | foreach $_ (@exts){ |
145 | my($pname) = canon('/', $_); |
146 | my($mname, $cname, $ccode); |
147 | ($mname = $pname) =~ s!/!::!g; |
148 | ($cname = $pname) =~ s!/!__!g; |
149 | if ($pname eq $dl){ |
150 | # Must NOT install 'DynaLoader::boot_DynaLoader' as 'bootstrap'! |
151 | # boot_DynaLoader is called directly in DynaLoader.pm |
152 | $ccode = "\t/* DynaLoader is a special case */\n\tnewXS(\"${mname}::boot_${cname}\", boot_${cname}, file);\n"; |
153 | push(@retval, $ccode) unless $seen{$ccode}++; |
154 | } else { |
155 | $ccode = "\tnewXS(\"${mname}::bootstrap\", boot_${cname}, file);\n"; |
156 | push(@retval, $ccode) unless $seen{$ccode}++; |
157 | } |
158 | } |
159 | return join '', @retval; |
160 | } |
161 | |
162 | sub static_ext { |
163 | unless (scalar @Extensions) { |
164 | @Extensions = sort split /\s+/, $Config{static_ext}; |
165 | unshift @Extensions, qw(DynaLoader); |
166 | } |
167 | @Extensions; |
168 | } |
169 | |
170 | sub ldopts { |
171 | require ExtUtils::MakeMaker; |
172 | require ExtUtils::Liblist; |
173 | my($std,$mods,$link_args,$path) = @_; |
174 | my(@mods,@link_args,@argv); |
175 | my($dllib,$config_libs,@potential_libs,@path); |
176 | local($") = ' ' unless $" eq ' '; |
177 | my $MM = bless {} => 'MY'; |
178 | if (scalar @_) { |
179 | @link_args = @$link_args if $link_args; |
180 | @mods = @$mods if $mods; |
181 | } |
182 | else { |
183 | @argv = @ARGV; |
184 | #hmm |
185 | while($_ = shift @argv) { |
186 | /^-std$/ && do { $std = 1; next; }; |
187 | /^--$/ && do { @link_args = @argv; last; }; |
188 | /^-I(.*)/ && do { $path = $1 || shift @argv; next; }; |
189 | push(@mods, $_); |
190 | } |
191 | } |
192 | $std = 1 unless scalar @link_args; |
193 | @path = $path ? split(/:/, $path) : @INC; |
194 | |
195 | push(@potential_libs, @link_args) if scalar @link_args; |
9c839522 |
196 | push(@potential_libs, $Config{perllibs}) if defined $std; |
a2c6f8f1 |
197 | |
198 | push(@mods, static_ext()) if $std; |
199 | |
200 | my($mod,@ns,$root,$sub,$extra,$archive,@archives); |
201 | print STDERR "Searching (@path) for archives\n" if $Verbose; |
202 | foreach $mod (@mods) { |
3ab83790 |
203 | @ns = split(/::|\/|\\/, $mod); |
a2c6f8f1 |
204 | $sub = $ns[-1]; |
205 | $root = $MM->catdir(@ns); |
206 | |
207 | print STDERR "searching for '$sub${lib_ext}'\n" if $Verbose; |
208 | foreach (@path) { |
209 | next unless -e ($archive = $MM->catdir($_,"auto",$root,"$sub$lib_ext")); |
210 | push @archives, $archive; |
211 | if(-e ($extra = $MM->catdir($_,"auto",$root,"extralibs.ld"))) { |
212 | local(*FH); |
213 | if(open(FH, $extra)) { |
214 | my($libs) = <FH>; chomp $libs; |
215 | push @potential_libs, split /\s+/, $libs; |
216 | } |
217 | else { |
218 | warn "Couldn't open '$extra'"; |
219 | } |
220 | } |
221 | last; |
222 | } |
223 | } |
224 | #print STDERR "\@potential_libs = @potential_libs\n"; |
225 | |
2d5bef1d |
226 | my $libperl = (grep(/^-l\w*perl\w*$/, @link_args))[0] || "-lperl"; |
af248097 |
227 | |
a2c6f8f1 |
228 | my($extralibs, $bsloadlibs, $ldloadlibs, $ld_run_path) = |
229 | $MM->ext(join ' ', |
af248097 |
230 | $MM->catdir("-L$Config{archlibexp}", "CORE"), " $libperl", |
a2c6f8f1 |
231 | @potential_libs); |
232 | |
233 | my $ld_or_bs = $bsloadlibs || $ldloadlibs; |
234 | print STDERR "bs: $bsloadlibs ** ld: $ldloadlibs" if $Verbose; |
f86702cc |
235 | my $linkage = "$Config{ccdlflags} $Config{ldflags} @archives $ld_or_bs"; |
a2c6f8f1 |
236 | print STDERR "ldopts: '$linkage'\n" if $Verbose; |
237 | |
238 | return $linkage if scalar @_; |
7e24002c |
239 | my_return("$linkage\n"); |
a2c6f8f1 |
240 | } |
241 | |
242 | sub ccflags { |
7e24002c |
243 | my_return(" $Config{ccflags} "); |
a2c6f8f1 |
244 | } |
245 | |
246 | sub ccdlflags { |
7e24002c |
247 | my_return(" $Config{ccdlflags} "); |
a2c6f8f1 |
248 | } |
249 | |
250 | sub perl_inc { |
7e24002c |
251 | my_return(" -I$Config{archlibexp}/CORE "); |
a2c6f8f1 |
252 | } |
253 | |
254 | sub ccopts { |
7e24002c |
255 | ccflags . perl_inc; |
a2c6f8f1 |
256 | } |
257 | |
258 | sub canon { |
259 | my($as, @ext) = @_; |
260 | foreach(@ext) { |
261 | # might be X::Y or lib/auto/X/Y/Y.a |
262 | next if s!::!/!g; |
263 | s:^(lib|ext)/(auto/)?::; |
264 | s:/\w+\.\w+$::; |
265 | } |
266 | grep(s:/:$as:, @ext) if ($as ne '/'); |
267 | @ext; |
268 | } |
269 | |
270 | __END__ |
271 | |
272 | =head1 NAME |
273 | |
274 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications |
275 | |
276 | =head1 SYNOPSIS |
277 | |
278 | |
279 | perl -MExtUtils::Embed -e xsinit |
280 | perl -MExtUtils::Embed -e ldopts |
281 | |
282 | =head1 DESCRIPTION |
283 | |
284 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter |
285 | and extensions in your C/C++ applications. |
286 | Typically, an application B<Makefile> will invoke ExtUtils::Embed |
287 | functions while building your application. |
288 | |
289 | =head1 @EXPORT |
290 | |
291 | ExtUtils::Embed exports the following functions: |
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292 | |
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293 | xsinit(), ldopts(), ccopts(), perl_inc(), ccflags(), |
294 | ccdlflags(), xsi_header(), xsi_protos(), xsi_body() |
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295 | |
296 | =head1 FUNCTIONS |
297 | |
bbc7dcd2 |
298 | =over 4 |
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299 | |
a2c6f8f1 |
300 | =item xsinit() |
301 | |
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302 | Generate C/C++ code for the XS initializer function. |
a2c6f8f1 |
303 | |
304 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`> |
305 | the following options are recognized: |
306 | |
4e864201 |
307 | B<-o> E<lt>output filenameE<gt> (Defaults to B<perlxsi.c>) |
a2c6f8f1 |
308 | |
309 | B<-o STDOUT> will print to STDOUT. |
310 | |
311 | B<-std> (Write code for extensions that are linked with the current Perl.) |
312 | |
313 | Any additional arguments are expected to be names of modules |
314 | to generate code for. |
315 | |
316 | When invoked with parameters the following are accepted and optional: |
317 | |
318 | C<xsinit($filename,$std,[@modules])> |
319 | |
320 | Where, |
321 | |
322 | B<$filename> is equivalent to the B<-o> option. |
323 | |
324 | B<$std> is boolean, equivalent to the B<-std> option. |
325 | |
326 | B<[@modules]> is an array ref, same as additional arguments mentioned above. |
327 | |
328 | =item Examples |
329 | |
a6006777 |
330 | |
a2c6f8f1 |
331 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket |
332 | |
333 | |
334 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function |
a7665c5e |
335 | to the C B<boot_Socket> function and writes it to a file named F<xsinit.c>. |
a2c6f8f1 |
336 | |
337 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly. |
338 | |
339 | perl -MExtUtils::Embed -e xsinit |
340 | |
341 | |
342 | This will generate code for linking with B<DynaLoader> and |
343 | each static extension found in B<$Config{static_ext}>. |
344 | The code is written to the default file name B<perlxsi.c>. |
345 | |
346 | |
347 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle |
348 | |
349 | |
350 | Here, code is written for all the currently linked extensions along with code |
351 | for B<DBI> and B<DBD::Oracle>. |
352 | |
353 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any |
354 | other extensions. |
355 | |
356 | =item ldopts() |
357 | |
358 | Output arguments for linking the Perl library and extensions to your |
359 | application. |
360 | |
361 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`> |
362 | the following options are recognized: |
363 | |
364 | B<-std> |
365 | |
366 | Output arguments for linking the Perl library and any extensions linked |
367 | with the current Perl. |
368 | |
4e864201 |
369 | B<-I> E<lt>path1:path2E<gt> |
a2c6f8f1 |
370 | |
371 | Search path for ModuleName.a archives. |
372 | Default path is B<@INC>. |
373 | Library archives are expected to be found as |
374 | B</some/path/auto/ModuleName/ModuleName.a> |
375 | For example, when looking for B<Socket.a> relative to a search path, |
376 | we should find B<auto/Socket/Socket.a> |
377 | |
378 | When looking for B<DBD::Oracle> relative to a search path, |
379 | we should find B<auto/DBD/Oracle/Oracle.a> |
380 | |
a7665c5e |
381 | Keep in mind that you can always supply B</my/own/path/ModuleName.a> |
a2c6f8f1 |
382 | as an additional linker argument. |
383 | |
4e864201 |
384 | B<--> E<lt>list of linker argsE<gt> |
a2c6f8f1 |
385 | |
386 | Additional linker arguments to be considered. |
387 | |
388 | Any additional arguments found before the B<--> token |
389 | are expected to be names of modules to generate code for. |
390 | |
391 | When invoked with parameters the following are accepted and optional: |
392 | |
393 | C<ldopts($std,[@modules],[@link_args],$path)> |
394 | |
a7665c5e |
395 | Where: |
a2c6f8f1 |
396 | |
397 | B<$std> is boolean, equivalent to the B<-std> option. |
398 | |
399 | B<[@modules]> is equivalent to additional arguments found before the B<--> token. |
400 | |
401 | B<[@link_args]> is equivalent to arguments found after the B<--> token. |
402 | |
403 | B<$path> is equivalent to the B<-I> option. |
404 | |
405 | In addition, when ldopts is called with parameters, it will return the argument string |
406 | rather than print it to STDOUT. |
407 | |
408 | =item Examples |
409 | |
410 | |
411 | perl -MExtUtils::Embed -e ldopts |
412 | |
413 | |
414 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and |
415 | extensions found in B<$Config{static_ext}>. This includes libraries |
416 | found in B<$Config{libs}> and the first ModuleName.a library |
417 | for each extension that is found by searching B<@INC> or the path |
de592821 |
418 | specified by the B<-I> option. |
a2c6f8f1 |
419 | In addition, when ModuleName.a is found, additional linker arguments |
420 | are picked up from the B<extralibs.ld> file in the same directory. |
421 | |
422 | |
423 | perl -MExtUtils::Embed -e ldopts -- -std Socket |
a6006777 |
424 | |
a2c6f8f1 |
425 | |
426 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension. |
427 | |
428 | |
429 | perl -MExtUtils::Embed -e ldopts -- DynaLoader |
430 | |
431 | |
432 | This will print arguments for linking with just the B<DynaLoader> extension |
433 | and B<libperl.a>. |
434 | |
435 | |
436 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql |
437 | |
438 | |
439 | Any arguments after the second '--' token are additional linker |
440 | arguments that will be examined for potential conflict. If there is no |
441 | conflict, the additional arguments will be part of the output. |
442 | |
443 | |
444 | =item perl_inc() |
445 | |
446 | For including perl header files this function simply prints: |
447 | |
36477c24 |
448 | -I$Config{archlibexp}/CORE |
a2c6f8f1 |
449 | |
450 | So, rather than having to say: |
451 | |
36477c24 |
452 | perl -MConfig -e 'print "-I$Config{archlibexp}/CORE"' |
a2c6f8f1 |
453 | |
454 | Just say: |
455 | |
456 | perl -MExtUtils::Embed -e perl_inc |
457 | |
458 | =item ccflags(), ccdlflags() |
459 | |
460 | These functions simply print $Config{ccflags} and $Config{ccdlflags} |
461 | |
462 | =item ccopts() |
463 | |
464 | This function combines perl_inc(), ccflags() and ccdlflags() into one. |
465 | |
466 | =item xsi_header() |
467 | |
468 | This function simply returns a string defining the same B<EXTERN_C> macro as |
469 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>. |
470 | |
471 | =item xsi_protos(@modules) |
472 | |
473 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules. |
474 | |
475 | =item xsi_body(@modules) |
476 | |
477 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap> |
478 | function to B<boot_ModuleName> for each @modules. |
479 | |
480 | B<xsinit()> uses the xsi_* functions to generate most of it's code. |
481 | |
2ae324a7 |
482 | =back |
483 | |
a2c6f8f1 |
484 | =head1 EXAMPLES |
485 | |
486 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications |
0325b4c4 |
487 | with embedded perl, see L<perlembed>. |
a6006777 |
488 | |
a2c6f8f1 |
489 | =head1 SEE ALSO |
490 | |
4e864201 |
491 | L<perlembed> |
a2c6f8f1 |
492 | |
493 | =head1 AUTHOR |
494 | |
4e864201 |
495 | Doug MacEachern E<lt>F<dougm@osf.org>E<gt> |
a2c6f8f1 |
496 | |
4e864201 |
497 | Based on ideas from Tim Bunce E<lt>F<Tim.Bunce@ig.co.uk>E<gt> and |
498 | B<minimod.pl> by Andreas Koenig E<lt>F<k@anna.in-berlin.de>E<gt> and Tim Bunce. |
a2c6f8f1 |
499 | |
500 | =cut |
501 | |