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1 | # $Id: Embed.pm,v 1.1.1.1 2002/01/16 19:27:19 schwern Exp $ |
2 | require 5.002; | |
3 | ||
4 | package ExtUtils::Embed; | |
5 | require Exporter; | |
6 | require FileHandle; | |
7 | use Config; | |
8 | use Getopt::Std; | |
9 | use File::Spec; | |
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 | ||
21 | $VERSION = 1.2506_01; | |
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 | ||
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 $val; | |
44 | } | |
45 | } | |
46 | ||
47 | sub xsinit { | |
48 | my($file, $std, $mods) = @_; | |
49 | my($fh,@mods,%seen); | |
50 | $file ||= "perlxsi.c"; | |
51 | my $xsinit_proto = "pTHX"; | |
52 | ||
53 | if (@_) { | |
54 | @mods = @$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(); | |
75 | print $fh "EXTERN_C void xs_init ($xsinit_proto);\n\n"; | |
76 | print $fh &xsi_protos(@mods); | |
77 | ||
78 | print $fh "\nEXTERN_C void\nxs_init($xsinit_proto)\n{\n"; | |
79 | print $fh &xsi_body(@mods); | |
80 | print $fh "}\n"; | |
81 | ||
82 | } | |
83 | ||
84 | sub xsi_header { | |
85 | return <<EOF; | |
86 | #include <EXTERN.h> | |
87 | #include <perl.h> | |
88 | ||
89 | EOF | |
90 | } | |
91 | ||
92 | sub xsi_protos { | |
93 | my(@exts) = @_; | |
94 | my(@retval,%seen); | |
95 | my $boot_proto = "pTHX_ CV* cv"; | |
96 | foreach $_ (@exts){ | |
97 | my($pname) = canon('/', $_); | |
98 | my($mname, $cname); | |
99 | ($mname = $pname) =~ s!/!::!g; | |
100 | ($cname = $pname) =~ s!/!__!g; | |
101 | my($ccode) = "EXTERN_C void boot_${cname} ($boot_proto);\n"; | |
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'); | |
112 | push(@retval, "\tchar *file = __FILE__;\n"); | |
113 | push(@retval, "\tdXSUB_SYS;\n") if $] > 5.002; | |
114 | push(@retval, "\n"); | |
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 _escape { | |
143 | my $arg = shift; | |
144 | $$arg =~ s/([\(\)])/\\$1/g; | |
145 | } | |
146 | ||
147 | sub _ldflags { | |
148 | my $ldflags = $Config{ldflags}; | |
149 | _escape(\$ldflags); | |
150 | return $ldflags; | |
151 | } | |
152 | ||
153 | sub _ccflags { | |
154 | my $ccflags = $Config{ccflags}; | |
155 | _escape(\$ccflags); | |
156 | return $ccflags; | |
157 | } | |
158 | ||
159 | sub _ccdlflags { | |
160 | my $ccdlflags = $Config{ccdlflags}; | |
161 | _escape(\$ccdlflags); | |
162 | return $ccdlflags; | |
163 | } | |
164 | ||
165 | sub ldopts { | |
166 | require ExtUtils::MakeMaker; | |
167 | require ExtUtils::Liblist; | |
168 | my($std,$mods,$link_args,$path) = @_; | |
169 | my(@mods,@link_args,@argv); | |
170 | my($dllib,$config_libs,@potential_libs,@path); | |
171 | local($") = ' ' unless $" eq ' '; | |
172 | if (scalar @_) { | |
173 | @link_args = @$link_args if $link_args; | |
174 | @mods = @$mods if $mods; | |
175 | } | |
176 | else { | |
177 | @argv = @ARGV; | |
178 | #hmm | |
179 | while($_ = shift @argv) { | |
180 | /^-std$/ && do { $std = 1; next; }; | |
181 | /^--$/ && do { @link_args = @argv; last; }; | |
182 | /^-I(.*)/ && do { $path = $1 || shift @argv; next; }; | |
183 | push(@mods, $_); | |
184 | } | |
185 | } | |
186 | $std = 1 unless scalar @link_args; | |
187 | my $sep = $Config{path_sep} || ':'; | |
188 | @path = $path ? split(/\Q$sep/, $path) : @INC; | |
189 | ||
190 | push(@potential_libs, @link_args) if scalar @link_args; | |
191 | # makemaker includes std libs on windows by default | |
192 | if ($^O ne 'MSWin32' and defined($std)) { | |
193 | push(@potential_libs, $Config{perllibs}); | |
194 | } | |
195 | ||
196 | push(@mods, static_ext()) if $std; | |
197 | ||
198 | my($mod,@ns,$root,$sub,$extra,$archive,@archives); | |
199 | print STDERR "Searching (@path) for archives\n" if $Verbose; | |
200 | foreach $mod (@mods) { | |
201 | @ns = split(/::|\/|\\/, $mod); | |
202 | $sub = $ns[-1]; | |
203 | $root = File::Spec->catdir(@ns); | |
204 | ||
205 | print STDERR "searching for '$sub${lib_ext}'\n" if $Verbose; | |
206 | foreach (@path) { | |
207 | next unless -e ($archive = File::Spec->catdir($_,"auto",$root,"$sub$lib_ext")); | |
208 | push @archives, $archive; | |
209 | if(-e ($extra = File::Spec->catdir($_,"auto",$root,"extralibs.ld"))) { | |
210 | local(*FH); | |
211 | if(open(FH, $extra)) { | |
212 | my($libs) = <FH>; chomp $libs; | |
213 | push @potential_libs, split /\s+/, $libs; | |
214 | } | |
215 | else { | |
216 | warn "Couldn't open '$extra'"; | |
217 | } | |
218 | } | |
219 | last; | |
220 | } | |
221 | } | |
222 | #print STDERR "\@potential_libs = @potential_libs\n"; | |
223 | ||
224 | my $libperl; | |
225 | if ($^O eq 'MSWin32') { | |
226 | $libperl = $Config{libperl}; | |
227 | } | |
228 | else { | |
229 | $libperl = (grep(/^-l\w*perl\w*$/, @link_args))[0] || "-lperl"; | |
230 | } | |
231 | ||
232 | my $lpath = File::Spec->catdir($Config{archlibexp}, 'CORE'); | |
233 | $lpath = qq["$lpath"] if $^O eq 'MSWin32'; | |
234 | my($extralibs, $bsloadlibs, $ldloadlibs, $ld_run_path) = | |
235 | MM->ext(join ' ', "-L$lpath", $libperl, @potential_libs); | |
236 | ||
237 | my $ld_or_bs = $bsloadlibs || $ldloadlibs; | |
238 | print STDERR "bs: $bsloadlibs ** ld: $ldloadlibs" if $Verbose; | |
239 | my $ccdlflags = _ccdlflags(); | |
240 | my $ldflags = _ldflags(); | |
241 | my $linkage = "$ccdlflags $ldflags @archives $ld_or_bs"; | |
242 | print STDERR "ldopts: '$linkage'\n" if $Verbose; | |
243 | ||
244 | return $linkage if scalar @_; | |
245 | my_return("$linkage\n"); | |
246 | } | |
247 | ||
248 | sub ccflags { | |
249 | my $ccflags = _ccflags(); | |
250 | my_return(" $ccflags "); | |
251 | } | |
252 | ||
253 | sub ccdlflags { | |
254 | my $ccdlflags = _ccdlflags(); | |
255 | my_return(" $ccdlflags "); | |
256 | } | |
257 | ||
258 | sub perl_inc { | |
259 | my $dir = File::Spec->catdir($Config{archlibexp}, 'CORE'); | |
260 | $dir = qq["$dir"] if $^O eq 'MSWin32'; | |
261 | my_return(" -I$dir "); | |
262 | } | |
263 | ||
264 | sub ccopts { | |
265 | ccflags . perl_inc; | |
266 | } | |
267 | ||
268 | sub canon { | |
269 | my($as, @ext) = @_; | |
270 | foreach(@ext) { | |
271 | # might be X::Y or lib/auto/X/Y/Y.a | |
272 | next if s!::!/!g; | |
273 | s:^(lib|ext)/(auto/)?::; | |
274 | s:/\w+\.\w+$::; | |
275 | } | |
276 | grep(s:/:$as:, @ext) if ($as ne '/'); | |
277 | @ext; | |
278 | } | |
279 | ||
280 | __END__ | |
281 | ||
282 | =head1 NAME | |
283 | ||
284 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications | |
285 | ||
286 | =head1 SYNOPSIS | |
287 | ||
288 | ||
289 | perl -MExtUtils::Embed -e xsinit | |
290 | perl -MExtUtils::Embed -e ccopts | |
291 | perl -MExtUtils::Embed -e ldopts | |
292 | ||
293 | =head1 DESCRIPTION | |
294 | ||
295 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter | |
296 | and extensions in your C/C++ applications. | |
297 | Typically, an application B<Makefile> will invoke ExtUtils::Embed | |
298 | functions while building your application. | |
299 | ||
300 | =head1 @EXPORT | |
301 | ||
302 | ExtUtils::Embed exports the following functions: | |
303 | ||
304 | xsinit(), ldopts(), ccopts(), perl_inc(), ccflags(), | |
305 | ccdlflags(), xsi_header(), xsi_protos(), xsi_body() | |
306 | ||
307 | =head1 FUNCTIONS | |
308 | ||
309 | =over 4 | |
310 | ||
311 | =item xsinit() | |
312 | ||
313 | Generate C/C++ code for the XS initializer function. | |
314 | ||
315 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`> | |
316 | the following options are recognized: | |
317 | ||
318 | B<-o> E<lt>output filenameE<gt> (Defaults to B<perlxsi.c>) | |
319 | ||
320 | B<-o STDOUT> will print to STDOUT. | |
321 | ||
322 | B<-std> (Write code for extensions that are linked with the current Perl.) | |
323 | ||
324 | Any additional arguments are expected to be names of modules | |
325 | to generate code for. | |
326 | ||
327 | When invoked with parameters the following are accepted and optional: | |
328 | ||
329 | C<xsinit($filename,$std,[@modules])> | |
330 | ||
331 | Where, | |
332 | ||
333 | B<$filename> is equivalent to the B<-o> option. | |
334 | ||
335 | B<$std> is boolean, equivalent to the B<-std> option. | |
336 | ||
337 | B<[@modules]> is an array ref, same as additional arguments mentioned above. | |
338 | ||
339 | =item Examples | |
340 | ||
341 | ||
342 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket | |
343 | ||
344 | ||
345 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function | |
346 | to the C B<boot_Socket> function and writes it to a file named F<xsinit.c>. | |
347 | ||
348 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly. | |
349 | ||
350 | perl -MExtUtils::Embed -e xsinit | |
351 | ||
352 | ||
353 | This will generate code for linking with B<DynaLoader> and | |
354 | each static extension found in B<$Config{static_ext}>. | |
355 | The code is written to the default file name B<perlxsi.c>. | |
356 | ||
357 | ||
358 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle | |
359 | ||
360 | ||
361 | Here, code is written for all the currently linked extensions along with code | |
362 | for B<DBI> and B<DBD::Oracle>. | |
363 | ||
364 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any | |
365 | other extensions. | |
366 | ||
367 | =item ldopts() | |
368 | ||
369 | Output arguments for linking the Perl library and extensions to your | |
370 | application. | |
371 | ||
372 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`> | |
373 | the following options are recognized: | |
374 | ||
375 | B<-std> | |
376 | ||
377 | Output arguments for linking the Perl library and any extensions linked | |
378 | with the current Perl. | |
379 | ||
380 | B<-I> E<lt>path1:path2E<gt> | |
381 | ||
382 | Search path for ModuleName.a archives. | |
383 | Default path is B<@INC>. | |
384 | Library archives are expected to be found as | |
385 | B</some/path/auto/ModuleName/ModuleName.a> | |
386 | For example, when looking for B<Socket.a> relative to a search path, | |
387 | we should find B<auto/Socket/Socket.a> | |
388 | ||
389 | When looking for B<DBD::Oracle> relative to a search path, | |
390 | we should find B<auto/DBD/Oracle/Oracle.a> | |
391 | ||
392 | Keep in mind that you can always supply B</my/own/path/ModuleName.a> | |
393 | as an additional linker argument. | |
394 | ||
395 | B<--> E<lt>list of linker argsE<gt> | |
396 | ||
397 | Additional linker arguments to be considered. | |
398 | ||
399 | Any additional arguments found before the B<--> token | |
400 | are expected to be names of modules to generate code for. | |
401 | ||
402 | When invoked with parameters the following are accepted and optional: | |
403 | ||
404 | C<ldopts($std,[@modules],[@link_args],$path)> | |
405 | ||
406 | Where: | |
407 | ||
408 | B<$std> is boolean, equivalent to the B<-std> option. | |
409 | ||
410 | B<[@modules]> is equivalent to additional arguments found before the B<--> token. | |
411 | ||
412 | B<[@link_args]> is equivalent to arguments found after the B<--> token. | |
413 | ||
414 | B<$path> is equivalent to the B<-I> option. | |
415 | ||
416 | In addition, when ldopts is called with parameters, it will return the argument string | |
417 | rather than print it to STDOUT. | |
418 | ||
419 | =item Examples | |
420 | ||
421 | ||
422 | perl -MExtUtils::Embed -e ldopts | |
423 | ||
424 | ||
425 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and | |
426 | extensions found in B<$Config{static_ext}>. This includes libraries | |
427 | found in B<$Config{libs}> and the first ModuleName.a library | |
428 | for each extension that is found by searching B<@INC> or the path | |
429 | specified by the B<-I> option. | |
430 | In addition, when ModuleName.a is found, additional linker arguments | |
431 | are picked up from the B<extralibs.ld> file in the same directory. | |
432 | ||
433 | ||
434 | perl -MExtUtils::Embed -e ldopts -- -std Socket | |
435 | ||
436 | ||
437 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension. | |
438 | ||
439 | ||
440 | perl -MExtUtils::Embed -e ldopts -- DynaLoader | |
441 | ||
442 | ||
443 | This will print arguments for linking with just the B<DynaLoader> extension | |
444 | and B<libperl.a>. | |
445 | ||
446 | ||
447 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql | |
448 | ||
449 | ||
450 | Any arguments after the second '--' token are additional linker | |
451 | arguments that will be examined for potential conflict. If there is no | |
452 | conflict, the additional arguments will be part of the output. | |
453 | ||
454 | ||
455 | =item perl_inc() | |
456 | ||
457 | For including perl header files this function simply prints: | |
458 | ||
459 | -I$Config{archlibexp}/CORE | |
460 | ||
461 | So, rather than having to say: | |
462 | ||
463 | perl -MConfig -e 'print "-I$Config{archlibexp}/CORE"' | |
464 | ||
465 | Just say: | |
466 | ||
467 | perl -MExtUtils::Embed -e perl_inc | |
468 | ||
469 | =item ccflags(), ccdlflags() | |
470 | ||
471 | These functions simply print $Config{ccflags} and $Config{ccdlflags} | |
472 | ||
473 | =item ccopts() | |
474 | ||
475 | This function combines perl_inc(), ccflags() and ccdlflags() into one. | |
476 | ||
477 | =item xsi_header() | |
478 | ||
479 | This function simply returns a string defining the same B<EXTERN_C> macro as | |
480 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>. | |
481 | ||
482 | =item xsi_protos(@modules) | |
483 | ||
484 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules. | |
485 | ||
486 | =item xsi_body(@modules) | |
487 | ||
488 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap> | |
489 | function to B<boot_ModuleName> for each @modules. | |
490 | ||
491 | B<xsinit()> uses the xsi_* functions to generate most of its code. | |
492 | ||
493 | =back | |
494 | ||
495 | =head1 EXAMPLES | |
496 | ||
497 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications | |
498 | with embedded perl, see L<perlembed>. | |
499 | ||
500 | =head1 SEE ALSO | |
501 | ||
502 | L<perlembed> | |
503 | ||
504 | =head1 AUTHOR | |
505 | ||
506 | Doug MacEachern E<lt>F<dougm@osf.org>E<gt> | |
507 | ||
508 | Based on ideas from Tim Bunce E<lt>F<Tim.Bunce@ig.co.uk>E<gt> and | |
509 | B<minimod.pl> by Andreas Koenig E<lt>F<k@anna.in-berlin.de>E<gt> and Tim Bunce. | |
510 | ||
511 | =cut | |
512 |