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1 | # $Id: Embed.pm,v 1.17 1996/07/02 13:48:17 dougm Exp $ |
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 | |
20 | $VERSION = sprintf("%d.%02d", q$Revision: 1.17 $ =~ /(\d+)\.(\d+)/); |
21 | #for the namespace change |
22 | $Devel::embed::VERSION = "99.99"; |
23 | |
24 | sub Version { $VERSION; } |
25 | |
26 | @ISA = qw(Exporter); |
27 | @EXPORT = qw(&xsinit &ldopts |
28 | &ccopts &ccflags &ccdlflags &perl_inc |
29 | &xsi_header &xsi_protos &xsi_body); |
30 | |
31 | #let's have Miniperl borrow from us instead |
32 | #require ExtUtils::Miniperl; |
33 | #*canon = \&ExtUtils::Miniperl::canon; |
34 | |
35 | $Verbose = 0; |
36 | $lib_ext = $Config{lib_ext} || '.a'; |
37 | |
38 | sub xsinit { |
39 | my($file, $std, $mods) = @_; |
40 | my($fh,@mods,%seen); |
41 | $file ||= "perlxsi.c"; |
42 | |
43 | if (@_) { |
44 | @mods = @$mods if $mods; |
45 | } |
46 | else { |
47 | getopts('o:s:'); |
48 | $file = $opt_o if defined $opt_o; |
49 | $std = $opt_s if defined $opt_s; |
50 | @mods = @ARGV; |
51 | } |
52 | $std = 1 unless scalar @mods; |
53 | |
54 | if ($file eq "STDOUT") { |
55 | $fh = \*STDOUT; |
56 | } |
57 | else { |
58 | $fh = new FileHandle "> $file"; |
59 | } |
60 | |
61 | push(@mods, static_ext()) if defined $std; |
62 | @mods = grep(!$seen{$_}++, @mods); |
63 | |
64 | print $fh &xsi_header(); |
65 | print $fh "EXTERN_C void xs_init _((void));\n\n"; |
66 | print $fh &xsi_protos(@mods); |
67 | |
68 | print $fh "\nEXTERN_C void\nxs_init()\n{\n"; |
69 | print $fh &xsi_body(@mods); |
70 | print $fh "}\n"; |
71 | |
72 | } |
73 | |
74 | sub xsi_header { |
75 | return <<EOF; |
76 | #ifdef __cplusplus |
77 | extern "C" { |
78 | #endif |
79 | |
80 | #include <EXTERN.h> |
81 | #include <perl.h> |
82 | |
83 | #ifdef __cplusplus |
84 | } |
85 | # ifndef EXTERN_C |
86 | # define EXTERN_C extern "C" |
87 | # endif |
88 | #else |
89 | # ifndef EXTERN_C |
90 | # define EXTERN_C extern |
91 | # endif |
92 | #endif |
93 | |
94 | EOF |
95 | } |
96 | |
97 | sub xsi_protos { |
98 | my(@exts) = @_; |
99 | my(@retval,%seen); |
100 | |
101 | foreach $_ (@exts){ |
102 | my($pname) = canon('/', $_); |
103 | my($mname, $cname); |
104 | ($mname = $pname) =~ s!/!::!g; |
105 | ($cname = $pname) =~ s!/!__!g; |
106 | my($ccode) = "EXTERN_C void boot_${cname} _((CV* cv));\n"; |
107 | next if $seen{$ccode}++; |
108 | push(@retval, $ccode); |
109 | } |
110 | return join '', @retval; |
111 | } |
112 | |
113 | sub xsi_body { |
114 | my(@exts) = @_; |
115 | my($pname,@retval,%seen); |
116 | my($dl) = canon('/','DynaLoader'); |
117 | push(@retval, "\tdXSUB_SYS;\n") if $] > 5.002; |
118 | push(@retval, "\tchar *file = __FILE__;\n\n"); |
119 | |
120 | foreach $_ (@exts){ |
121 | my($pname) = canon('/', $_); |
122 | my($mname, $cname, $ccode); |
123 | ($mname = $pname) =~ s!/!::!g; |
124 | ($cname = $pname) =~ s!/!__!g; |
125 | if ($pname eq $dl){ |
126 | # Must NOT install 'DynaLoader::boot_DynaLoader' as 'bootstrap'! |
127 | # boot_DynaLoader is called directly in DynaLoader.pm |
128 | $ccode = "\t/* DynaLoader is a special case */\n\tnewXS(\"${mname}::boot_${cname}\", boot_${cname}, file);\n"; |
129 | push(@retval, $ccode) unless $seen{$ccode}++; |
130 | } else { |
131 | $ccode = "\tnewXS(\"${mname}::bootstrap\", boot_${cname}, file);\n"; |
132 | push(@retval, $ccode) unless $seen{$ccode}++; |
133 | } |
134 | } |
135 | return join '', @retval; |
136 | } |
137 | |
138 | sub static_ext { |
139 | unless (scalar @Extensions) { |
140 | @Extensions = sort split /\s+/, $Config{static_ext}; |
141 | unshift @Extensions, qw(DynaLoader); |
142 | } |
143 | @Extensions; |
144 | } |
145 | |
146 | sub ldopts { |
147 | require ExtUtils::MakeMaker; |
148 | require ExtUtils::Liblist; |
149 | my($std,$mods,$link_args,$path) = @_; |
150 | my(@mods,@link_args,@argv); |
151 | my($dllib,$config_libs,@potential_libs,@path); |
152 | local($") = ' ' unless $" eq ' '; |
153 | my $MM = bless {} => 'MY'; |
154 | if (scalar @_) { |
155 | @link_args = @$link_args if $link_args; |
156 | @mods = @$mods if $mods; |
157 | } |
158 | else { |
159 | @argv = @ARGV; |
160 | #hmm |
161 | while($_ = shift @argv) { |
162 | /^-std$/ && do { $std = 1; next; }; |
163 | /^--$/ && do { @link_args = @argv; last; }; |
164 | /^-I(.*)/ && do { $path = $1 || shift @argv; next; }; |
165 | push(@mods, $_); |
166 | } |
167 | } |
168 | $std = 1 unless scalar @link_args; |
169 | @path = $path ? split(/:/, $path) : @INC; |
170 | |
171 | push(@potential_libs, @link_args) if scalar @link_args; |
172 | push(@potential_libs, $Config{libs}) if defined $std; |
173 | |
174 | push(@mods, static_ext()) if $std; |
175 | |
176 | my($mod,@ns,$root,$sub,$extra,$archive,@archives); |
177 | print STDERR "Searching (@path) for archives\n" if $Verbose; |
178 | foreach $mod (@mods) { |
179 | @ns = split('::', $mod); |
180 | $sub = $ns[-1]; |
181 | $root = $MM->catdir(@ns); |
182 | |
183 | print STDERR "searching for '$sub${lib_ext}'\n" if $Verbose; |
184 | foreach (@path) { |
185 | next unless -e ($archive = $MM->catdir($_,"auto",$root,"$sub$lib_ext")); |
186 | push @archives, $archive; |
187 | if(-e ($extra = $MM->catdir($_,"auto",$root,"extralibs.ld"))) { |
188 | local(*FH); |
189 | if(open(FH, $extra)) { |
190 | my($libs) = <FH>; chomp $libs; |
191 | push @potential_libs, split /\s+/, $libs; |
192 | } |
193 | else { |
194 | warn "Couldn't open '$extra'"; |
195 | } |
196 | } |
197 | last; |
198 | } |
199 | } |
200 | #print STDERR "\@potential_libs = @potential_libs\n"; |
201 | |
202 | my($extralibs, $bsloadlibs, $ldloadlibs, $ld_run_path) = |
203 | $MM->ext(join ' ', |
204 | $MM->catdir("-L$Config{archlib}", "CORE"), " -lperl", |
205 | @potential_libs); |
206 | |
207 | my $ld_or_bs = $bsloadlibs || $ldloadlibs; |
208 | print STDERR "bs: $bsloadlibs ** ld: $ldloadlibs" if $Verbose; |
209 | my $linkage = "$Config{ldflags} @archives $ld_or_bs"; |
210 | print STDERR "ldopts: '$linkage'\n" if $Verbose; |
211 | |
212 | return $linkage if scalar @_; |
213 | print "$linkage\n"; |
214 | } |
215 | |
216 | sub ccflags { |
217 | print " $Config{ccflags} "; |
218 | } |
219 | |
220 | sub ccdlflags { |
221 | print " $Config{ccdlflags} "; |
222 | } |
223 | |
224 | sub perl_inc { |
225 | print " -I $Config{archlib}/CORE "; |
226 | } |
227 | |
228 | sub ccopts { |
229 | ccflags; |
230 | ccdlflags; |
231 | perl_inc; |
232 | } |
233 | |
234 | sub canon { |
235 | my($as, @ext) = @_; |
236 | foreach(@ext) { |
237 | # might be X::Y or lib/auto/X/Y/Y.a |
238 | next if s!::!/!g; |
239 | s:^(lib|ext)/(auto/)?::; |
240 | s:/\w+\.\w+$::; |
241 | } |
242 | grep(s:/:$as:, @ext) if ($as ne '/'); |
243 | @ext; |
244 | } |
245 | |
246 | __END__ |
247 | |
248 | =head1 NAME |
249 | |
250 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications |
251 | |
252 | =head1 SYNOPSIS |
253 | |
254 | |
255 | perl -MExtUtils::Embed -e xsinit |
256 | perl -MExtUtils::Embed -e ldopts |
257 | |
258 | =head1 DESCRIPTION |
259 | |
260 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter |
261 | and extensions in your C/C++ applications. |
262 | Typically, an application B<Makefile> will invoke ExtUtils::Embed |
263 | functions while building your application. |
264 | |
265 | =head1 @EXPORT |
266 | |
267 | ExtUtils::Embed exports the following functions: |
268 | |
269 | L<xsinit()>, L<ldopts()>, L<ccopts()>, L<perl_inc()>, L<ccflags()>, |
270 | L<ccdlflags()>, L<xsi_header()>, L<xsi_protos()>, L<xsi_body()> |
271 | |
272 | =head1 FUNCTIONS |
273 | |
274 | =item xsinit() |
275 | |
276 | Generate C/C++ code for the XS intializer function. |
277 | |
278 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`> |
279 | the following options are recognized: |
280 | |
281 | B<-o> <output filename> (Defaults to B<perlxsi.c>) |
282 | |
283 | B<-o STDOUT> will print to STDOUT. |
284 | |
285 | B<-std> (Write code for extensions that are linked with the current Perl.) |
286 | |
287 | Any additional arguments are expected to be names of modules |
288 | to generate code for. |
289 | |
290 | When invoked with parameters the following are accepted and optional: |
291 | |
292 | C<xsinit($filename,$std,[@modules])> |
293 | |
294 | Where, |
295 | |
296 | B<$filename> is equivalent to the B<-o> option. |
297 | |
298 | B<$std> is boolean, equivalent to the B<-std> option. |
299 | |
300 | B<[@modules]> is an array ref, same as additional arguments mentioned above. |
301 | |
302 | =item Examples |
303 | |
304 | |
305 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket |
306 | |
307 | |
308 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function |
309 | to the C B<boot_Socket> function and writes it to a file named "xsinit.c". |
310 | |
311 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly. |
312 | |
313 | perl -MExtUtils::Embed -e xsinit |
314 | |
315 | |
316 | This will generate code for linking with B<DynaLoader> and |
317 | each static extension found in B<$Config{static_ext}>. |
318 | The code is written to the default file name B<perlxsi.c>. |
319 | |
320 | |
321 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle |
322 | |
323 | |
324 | Here, code is written for all the currently linked extensions along with code |
325 | for B<DBI> and B<DBD::Oracle>. |
326 | |
327 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any |
328 | other extensions. |
329 | |
330 | =item ldopts() |
331 | |
332 | Output arguments for linking the Perl library and extensions to your |
333 | application. |
334 | |
335 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`> |
336 | the following options are recognized: |
337 | |
338 | B<-std> |
339 | |
340 | Output arguments for linking the Perl library and any extensions linked |
341 | with the current Perl. |
342 | |
343 | B<-I> <path1:path2> |
344 | |
345 | Search path for ModuleName.a archives. |
346 | Default path is B<@INC>. |
347 | Library archives are expected to be found as |
348 | B</some/path/auto/ModuleName/ModuleName.a> |
349 | For example, when looking for B<Socket.a> relative to a search path, |
350 | we should find B<auto/Socket/Socket.a> |
351 | |
352 | When looking for B<DBD::Oracle> relative to a search path, |
353 | we should find B<auto/DBD/Oracle/Oracle.a> |
354 | |
355 | Keep in mind, you can always supply B</my/own/path/ModuleName.a> |
356 | as an additional linker argument. |
357 | |
358 | B<--> <list of linker args> |
359 | |
360 | Additional linker arguments to be considered. |
361 | |
362 | Any additional arguments found before the B<--> token |
363 | are expected to be names of modules to generate code for. |
364 | |
365 | When invoked with parameters the following are accepted and optional: |
366 | |
367 | C<ldopts($std,[@modules],[@link_args],$path)> |
368 | |
369 | Where, |
370 | |
371 | B<$std> is boolean, equivalent to the B<-std> option. |
372 | |
373 | B<[@modules]> is equivalent to additional arguments found before the B<--> token. |
374 | |
375 | B<[@link_args]> is equivalent to arguments found after the B<--> token. |
376 | |
377 | B<$path> is equivalent to the B<-I> option. |
378 | |
379 | In addition, when ldopts is called with parameters, it will return the argument string |
380 | rather than print it to STDOUT. |
381 | |
382 | =item Examples |
383 | |
384 | |
385 | perl -MExtUtils::Embed -e ldopts |
386 | |
387 | |
388 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and |
389 | extensions found in B<$Config{static_ext}>. This includes libraries |
390 | found in B<$Config{libs}> and the first ModuleName.a library |
391 | for each extension that is found by searching B<@INC> or the path |
392 | specifed by the B<-I> option. |
393 | In addition, when ModuleName.a is found, additional linker arguments |
394 | are picked up from the B<extralibs.ld> file in the same directory. |
395 | |
396 | |
397 | perl -MExtUtils::Embed -e ldopts -- -std Socket |
398 | |
399 | |
400 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension. |
401 | |
402 | |
403 | perl -MExtUtils::Embed -e ldopts -- DynaLoader |
404 | |
405 | |
406 | This will print arguments for linking with just the B<DynaLoader> extension |
407 | and B<libperl.a>. |
408 | |
409 | |
410 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql |
411 | |
412 | |
413 | Any arguments after the second '--' token are additional linker |
414 | arguments that will be examined for potential conflict. If there is no |
415 | conflict, the additional arguments will be part of the output. |
416 | |
417 | |
418 | =item perl_inc() |
419 | |
420 | For including perl header files this function simply prints: |
421 | |
422 | -I $Config{archlib}/CORE |
423 | |
424 | So, rather than having to say: |
425 | |
426 | perl -MConfig -e 'print "-I $Config{archlib}/CORE"' |
427 | |
428 | Just say: |
429 | |
430 | perl -MExtUtils::Embed -e perl_inc |
431 | |
432 | =item ccflags(), ccdlflags() |
433 | |
434 | These functions simply print $Config{ccflags} and $Config{ccdlflags} |
435 | |
436 | =item ccopts() |
437 | |
438 | This function combines perl_inc(), ccflags() and ccdlflags() into one. |
439 | |
440 | =item xsi_header() |
441 | |
442 | This function simply returns a string defining the same B<EXTERN_C> macro as |
443 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>. |
444 | |
445 | =item xsi_protos(@modules) |
446 | |
447 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules. |
448 | |
449 | =item xsi_body(@modules) |
450 | |
451 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap> |
452 | function to B<boot_ModuleName> for each @modules. |
453 | |
454 | B<xsinit()> uses the xsi_* functions to generate most of it's code. |
455 | |
456 | =head1 EXAMPLES |
457 | |
458 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications |
459 | with embedded perl, see the eg/ directory and the I<perlembed> man page. |
460 | |
461 | =head1 SEE ALSO |
462 | |
463 | the I<perlembed> man page |
464 | |
465 | =head1 AUTHOR |
466 | |
467 | Doug MacEachern <dougm@osf.org> |
468 | |
469 | Based on ideas from Tim Bunce <Tim.Bunce@ig.co.uk> and |
470 | B<minimod.pl> by Andreas Koenig <k@anna.in-berlin.de> and Tim Bunce. |
471 | |
472 | =cut |
473 | |