| 1 | # $Id: Embed.pm,v 1.22 1997/01/30 00:37:09 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: 1.22 $ =~ /(\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{archlibexp}", "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{ccdlflags} $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{archlibexp}/CORE "; |
| 226 | } |
| 227 | |
| 228 | sub ccopts { |
| 229 | ccflags; |
| 230 | perl_inc; |
| 231 | } |
| 232 | |
| 233 | sub canon { |
| 234 | my($as, @ext) = @_; |
| 235 | foreach(@ext) { |
| 236 | # might be X::Y or lib/auto/X/Y/Y.a |
| 237 | next if s!::!/!g; |
| 238 | s:^(lib|ext)/(auto/)?::; |
| 239 | s:/\w+\.\w+$::; |
| 240 | } |
| 241 | grep(s:/:$as:, @ext) if ($as ne '/'); |
| 242 | @ext; |
| 243 | } |
| 244 | |
| 245 | __END__ |
| 246 | |
| 247 | =head1 NAME |
| 248 | |
| 249 | ExtUtils::Embed - Utilities for embedding Perl in C/C++ applications |
| 250 | |
| 251 | =head1 SYNOPSIS |
| 252 | |
| 253 | |
| 254 | perl -MExtUtils::Embed -e xsinit |
| 255 | perl -MExtUtils::Embed -e ldopts |
| 256 | |
| 257 | =head1 DESCRIPTION |
| 258 | |
| 259 | ExtUtils::Embed provides utility functions for embedding a Perl interpreter |
| 260 | and extensions in your C/C++ applications. |
| 261 | Typically, an application B<Makefile> will invoke ExtUtils::Embed |
| 262 | functions while building your application. |
| 263 | |
| 264 | =head1 @EXPORT |
| 265 | |
| 266 | ExtUtils::Embed exports the following functions: |
| 267 | |
| 268 | xsinit(), ldopts(), ccopts(), perl_inc(), ccflags(), |
| 269 | ccdlflags(), xsi_header(), xsi_protos(), xsi_body() |
| 270 | |
| 271 | =head1 FUNCTIONS |
| 272 | |
| 273 | =item xsinit() |
| 274 | |
| 275 | Generate C/C++ code for the XS initializer function. |
| 276 | |
| 277 | When invoked as C<`perl -MExtUtils::Embed -e xsinit --`> |
| 278 | the following options are recognized: |
| 279 | |
| 280 | B<-o> E<lt>output filenameE<gt> (Defaults to B<perlxsi.c>) |
| 281 | |
| 282 | B<-o STDOUT> will print to STDOUT. |
| 283 | |
| 284 | B<-std> (Write code for extensions that are linked with the current Perl.) |
| 285 | |
| 286 | Any additional arguments are expected to be names of modules |
| 287 | to generate code for. |
| 288 | |
| 289 | When invoked with parameters the following are accepted and optional: |
| 290 | |
| 291 | C<xsinit($filename,$std,[@modules])> |
| 292 | |
| 293 | Where, |
| 294 | |
| 295 | B<$filename> is equivalent to the B<-o> option. |
| 296 | |
| 297 | B<$std> is boolean, equivalent to the B<-std> option. |
| 298 | |
| 299 | B<[@modules]> is an array ref, same as additional arguments mentioned above. |
| 300 | |
| 301 | =item Examples |
| 302 | |
| 303 | |
| 304 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c Socket |
| 305 | |
| 306 | |
| 307 | This will generate code with an B<xs_init> function that glues the perl B<Socket::bootstrap> function |
| 308 | to the C B<boot_Socket> function and writes it to a file named "xsinit.c". |
| 309 | |
| 310 | Note that B<DynaLoader> is a special case where it must call B<boot_DynaLoader> directly. |
| 311 | |
| 312 | perl -MExtUtils::Embed -e xsinit |
| 313 | |
| 314 | |
| 315 | This will generate code for linking with B<DynaLoader> and |
| 316 | each static extension found in B<$Config{static_ext}>. |
| 317 | The code is written to the default file name B<perlxsi.c>. |
| 318 | |
| 319 | |
| 320 | perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI DBD::Oracle |
| 321 | |
| 322 | |
| 323 | Here, code is written for all the currently linked extensions along with code |
| 324 | for B<DBI> and B<DBD::Oracle>. |
| 325 | |
| 326 | If you have a working B<DynaLoader> then there is rarely any need to statically link in any |
| 327 | other extensions. |
| 328 | |
| 329 | =item ldopts() |
| 330 | |
| 331 | Output arguments for linking the Perl library and extensions to your |
| 332 | application. |
| 333 | |
| 334 | When invoked as C<`perl -MExtUtils::Embed -e ldopts --`> |
| 335 | the following options are recognized: |
| 336 | |
| 337 | B<-std> |
| 338 | |
| 339 | Output arguments for linking the Perl library and any extensions linked |
| 340 | with the current Perl. |
| 341 | |
| 342 | B<-I> E<lt>path1:path2E<gt> |
| 343 | |
| 344 | Search path for ModuleName.a archives. |
| 345 | Default path is B<@INC>. |
| 346 | Library archives are expected to be found as |
| 347 | B</some/path/auto/ModuleName/ModuleName.a> |
| 348 | For example, when looking for B<Socket.a> relative to a search path, |
| 349 | we should find B<auto/Socket/Socket.a> |
| 350 | |
| 351 | When looking for B<DBD::Oracle> relative to a search path, |
| 352 | we should find B<auto/DBD/Oracle/Oracle.a> |
| 353 | |
| 354 | Keep in mind, you can always supply B</my/own/path/ModuleName.a> |
| 355 | as an additional linker argument. |
| 356 | |
| 357 | B<--> E<lt>list of linker argsE<gt> |
| 358 | |
| 359 | Additional linker arguments to be considered. |
| 360 | |
| 361 | Any additional arguments found before the B<--> token |
| 362 | are expected to be names of modules to generate code for. |
| 363 | |
| 364 | When invoked with parameters the following are accepted and optional: |
| 365 | |
| 366 | C<ldopts($std,[@modules],[@link_args],$path)> |
| 367 | |
| 368 | Where, |
| 369 | |
| 370 | B<$std> is boolean, equivalent to the B<-std> option. |
| 371 | |
| 372 | B<[@modules]> is equivalent to additional arguments found before the B<--> token. |
| 373 | |
| 374 | B<[@link_args]> is equivalent to arguments found after the B<--> token. |
| 375 | |
| 376 | B<$path> is equivalent to the B<-I> option. |
| 377 | |
| 378 | In addition, when ldopts is called with parameters, it will return the argument string |
| 379 | rather than print it to STDOUT. |
| 380 | |
| 381 | =item Examples |
| 382 | |
| 383 | |
| 384 | perl -MExtUtils::Embed -e ldopts |
| 385 | |
| 386 | |
| 387 | This will print arguments for linking with B<libperl.a>, B<DynaLoader> and |
| 388 | extensions found in B<$Config{static_ext}>. This includes libraries |
| 389 | found in B<$Config{libs}> and the first ModuleName.a library |
| 390 | for each extension that is found by searching B<@INC> or the path |
| 391 | specifed by the B<-I> option. |
| 392 | In addition, when ModuleName.a is found, additional linker arguments |
| 393 | are picked up from the B<extralibs.ld> file in the same directory. |
| 394 | |
| 395 | |
| 396 | perl -MExtUtils::Embed -e ldopts -- -std Socket |
| 397 | |
| 398 | |
| 399 | This will do the same as the above example, along with printing additional arguments for linking with the B<Socket> extension. |
| 400 | |
| 401 | |
| 402 | perl -MExtUtils::Embed -e ldopts -- DynaLoader |
| 403 | |
| 404 | |
| 405 | This will print arguments for linking with just the B<DynaLoader> extension |
| 406 | and B<libperl.a>. |
| 407 | |
| 408 | |
| 409 | perl -MExtUtils::Embed -e ldopts -- -std Msql -- -L/usr/msql/lib -lmsql |
| 410 | |
| 411 | |
| 412 | Any arguments after the second '--' token are additional linker |
| 413 | arguments that will be examined for potential conflict. If there is no |
| 414 | conflict, the additional arguments will be part of the output. |
| 415 | |
| 416 | |
| 417 | =item perl_inc() |
| 418 | |
| 419 | For including perl header files this function simply prints: |
| 420 | |
| 421 | -I$Config{archlibexp}/CORE |
| 422 | |
| 423 | So, rather than having to say: |
| 424 | |
| 425 | perl -MConfig -e 'print "-I$Config{archlibexp}/CORE"' |
| 426 | |
| 427 | Just say: |
| 428 | |
| 429 | perl -MExtUtils::Embed -e perl_inc |
| 430 | |
| 431 | =item ccflags(), ccdlflags() |
| 432 | |
| 433 | These functions simply print $Config{ccflags} and $Config{ccdlflags} |
| 434 | |
| 435 | =item ccopts() |
| 436 | |
| 437 | This function combines perl_inc(), ccflags() and ccdlflags() into one. |
| 438 | |
| 439 | =item xsi_header() |
| 440 | |
| 441 | This function simply returns a string defining the same B<EXTERN_C> macro as |
| 442 | B<perlmain.c> along with #including B<perl.h> and B<EXTERN.h>. |
| 443 | |
| 444 | =item xsi_protos(@modules) |
| 445 | |
| 446 | This function returns a string of B<boot_$ModuleName> prototypes for each @modules. |
| 447 | |
| 448 | =item xsi_body(@modules) |
| 449 | |
| 450 | This function returns a string of calls to B<newXS()> that glue the module B<bootstrap> |
| 451 | function to B<boot_ModuleName> for each @modules. |
| 452 | |
| 453 | B<xsinit()> uses the xsi_* functions to generate most of it's code. |
| 454 | |
| 455 | =head1 EXAMPLES |
| 456 | |
| 457 | For examples on how to use B<ExtUtils::Embed> for building C/C++ applications |
| 458 | with embedded perl, see the eg/ directory and L<perlembed>. |
| 459 | |
| 460 | =head1 SEE ALSO |
| 461 | |
| 462 | L<perlembed> |
| 463 | |
| 464 | =head1 AUTHOR |
| 465 | |
| 466 | Doug MacEachern E<lt>F<dougm@osf.org>E<gt> |
| 467 | |
| 468 | Based on ideas from Tim Bunce E<lt>F<Tim.Bunce@ig.co.uk>E<gt> and |
| 469 | B<minimod.pl> by Andreas Koenig E<lt>F<k@anna.in-berlin.de>E<gt> and Tim Bunce. |
| 470 | |
| 471 | =cut |
| 472 | |