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Revision 1.21 by root, Sat Dec 11 23:28:22 2010 UTC vs.
Revision 1.40 by root, Sun May 1 09:29:47 2011 UTC

9 staticperl configure # fetch and then configure perl 9 staticperl configure # fetch and then configure perl
10 staticperl build # configure and then build perl 10 staticperl build # configure and then build perl
11 staticperl install # build and then install perl 11 staticperl install # build and then install perl
12 staticperl clean # clean most intermediate files (restart at configure) 12 staticperl clean # clean most intermediate files (restart at configure)
13 staticperl distclean # delete everything installed by this script 13 staticperl distclean # delete everything installed by this script
14 staticperl perl ... # invoke the perlinterpreter
14 staticperl cpan # invoke CPAN shell 15 staticperl cpan # invoke CPAN shell
15 staticperl instmod path... # install unpacked modules 16 staticperl instmod path... # install unpacked modules
16 staticperl instcpan modulename... # install modules from CPAN 17 staticperl instcpan modulename... # install modules from CPAN
17 staticperl mkbundle <bundle-args...> # see documentation 18 staticperl mkbundle <bundle-args...> # see documentation
18 staticperl mkperl <bundle-args...> # see documentation 19 staticperl mkperl <bundle-args...> # see documentation
20 21
21Typical Examples: 22Typical Examples:
22 23
23 staticperl install # fetch, configure, build and install perl 24 staticperl install # fetch, configure, build and install perl
24 staticperl cpan # run interactive cpan shell 25 staticperl cpan # run interactive cpan shell
25 staticperl mkperl -M '"Config_heavy.pl"' # build a perl that supports -V 26 staticperl mkperl -MConfig_heavy.pl # build a perl that supports -V
26 staticperl mkperl -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI -MURI::http 27 staticperl mkperl -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI -MURI::http
27 # build a perl with the above modules linked in 28 # build a perl with the above modules linked in
28 staticperl mkapp myapp --boot mainprog mymodules 29 staticperl mkapp myapp --boot mainprog mymodules
29 # build a binary "myapp" from mainprog and mymodules 30 # build a binary "myapp" from mainprog and mymodules
30 31
139with creating binaries and bundle files. 140with creating binaries and bundle files.
140 141
141=head2 PHASE 1 COMMANDS: INSTALLING PERL 142=head2 PHASE 1 COMMANDS: INSTALLING PERL
142 143
143The most important command is F<install>, which does basically 144The most important command is F<install>, which does basically
144everything. The default is to download and install perl 5.12.2 and a few 145everything. The default is to download and install perl 5.12.3 and a few
145modules required by F<staticperl> itself, but all this can (and should) be 146modules required by F<staticperl> itself, but all this can (and should) be
146changed - see L<CONFIGURATION>, below. 147changed - see L<CONFIGURATION>, below.
147 148
148The command 149The command
149 150
150 staticperl install 151 staticperl install
151 152
152Is normally all you need: It installs the perl interpreter in 153is normally all you need: It installs the perl interpreter in
153F<~/.staticperl/perl>. It downloads, configures, builds and installs the 154F<~/.staticperl/perl>. It downloads, configures, builds and installs the
154perl interpreter if required. 155perl interpreter if required.
155 156
156Most of the following commands simply run one or more steps of this 157Most of the following F<staticperl> subcommands simply run one or more
157sequence. 158steps of this sequence.
159
160If it fails, then most commonly because the compiler options I selected
161are not supported by your compiler - either edit the F<staticperl> script
162yourself or create F<~/.staticperl> shell script where your set working
163C<PERL_CCFLAGS> etc. variables.
158 164
159To force recompilation or reinstallation, you need to run F<staticperl 165To force recompilation or reinstallation, you need to run F<staticperl
160distclean> first. 166distclean> first.
161 167
162=over 4 168=over 4
180 186
181=item F<staticperl install> 187=item F<staticperl install>
182 188
183Wipes the perl installation directory (usually F<~/.staticperl/perl>) and 189Wipes the perl installation directory (usually F<~/.staticperl/perl>) and
184installs the perl distribution, potentially after building it first. 190installs the perl distribution, potentially after building it first.
191
192=item F<staticperl perl> [args...]
193
194Invokes the compiled perl interpreter with the given args. Basically the
195same as starting perl directly (usually via F<~/.staticperl/bin/perl>),
196but beats typing the path sometimes.
197
198Example: check that the Gtk2 module is installed and loadable.
199
200 staticperl perl -MGtk2 -e0
185 201
186=item F<staticperl cpan> [args...] 202=item F<staticperl cpan> [args...]
187 203
188Starts an interactive CPAN shell that you can use to install further 204Starts an interactive CPAN shell that you can use to install further
189modules. Installs the perl first if necessary, but apart from that, 205modules. Installs the perl first if necessary, but apart from that,
209 225
210=item F<staticperl clean> 226=item F<staticperl clean>
211 227
212Deletes the perl source directory (and potentially cleans up other 228Deletes the perl source directory (and potentially cleans up other
213intermediate files). This can be used to clean up files only needed for 229intermediate files). This can be used to clean up files only needed for
214building perl, without removing the installed perl interpreter, or to 230building perl, without removing the installed perl interpreter.
215force a re-build from scratch.
216 231
217At the moment, it doesn't delete downloaded tarballs. 232At the moment, it doesn't delete downloaded tarballs.
233
234The exact semantics of this command will probably change.
218 235
219=item F<staticperl distclean> 236=item F<staticperl distclean>
220 237
221This wipes your complete F<~/.staticperl> directory. Be careful with this, 238This wipes your complete F<~/.staticperl> directory. Be careful with this,
222it nukes your perl download, perl sources, perl distribution and any 239it nukes your perl download, perl sources, perl distribution and any
246 263
247 # first make sure we have perl and the required modules 264 # first make sure we have perl and the required modules
248 staticperl instcpan AnyEvent::HTTPD 265 staticperl instcpan AnyEvent::HTTPD
249 266
250 # now build the perl 267 # now build the perl
251 staticperl mkperl -M'"Config_heavy.pl"' -MAnyEvent::Impl::Perl \ 268 staticperl mkperl -MConfig_heavy.pl -MAnyEvent::Impl::Perl \
252 -MAnyEvent::HTTPD -MURI::http \ 269 -MAnyEvent::HTTPD -MURI::http \
253 --add 'eg/httpd httpd.pm' 270 --add 'eg/httpd httpd.pm'
254 271
255 # finally, invoke it 272 # finally, invoke it
256 ./perl -Mhttpd 273 ./perl -Mhttpd
272 -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI::http 289 -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI::http
273 290
274 # run it 291 # run it
275 ./app 292 ./app
276 293
294Here are the three phase 2 commands:
295
296=over 4
297
298=item F<staticperl mkbundle> args...
299
300The "default" bundle command - it interprets the given bundle options and
301writes out F<bundle.h>, F<bundle.c>, F<bundle.ccopts> and F<bundle.ldopts>
302files, useful for embedding.
303
304=item F<staticperl mkperl> args...
305
306Creates a bundle just like F<staticperl mkbundle> (in fact, it's the same
307as invoking F<staticperl mkbundle --perl> args...), but then compiles and
308links a new perl interpreter that embeds the created bundle, then deletes
309all intermediate files.
310
311=item F<staticperl mkapp> filename args...
312
313Does the same as F<staticperl mkbundle> (in fact, it's the same as
314invoking F<staticperl mkbundle --app> filename args...), but then compiles
315and links a new standalone application that simply initialises the perl
316interpreter.
317
318The difference to F<staticperl mkperl> is that the standalone application
319does not act like a perl interpreter would - in fact, by default it would
320just do nothing and exit immediately, so you should specify some code to
321be executed via the F<--boot> option.
322
323=back
324
277=head3 OPTION PROCESSING 325=head3 OPTION PROCESSING
278 326
279All options can be given as arguments on the command line (typically 327All options can be given as arguments on the command line (typically
280using long (e.g. C<--verbose>) or short option (e.g. C<-v>) style). Since 328using long (e.g. C<--verbose>) or short option (e.g. C<-v>) style). Since
281specifying a lot of modules can make the command line very cumbersome, 329specifying a lot of options can make the command line very long and
282you can put all long options into a "bundle specification file" (with or 330unwieldy, you can put all long options into a "bundle specification file"
283without C<--> prefix) and specify this bundle file instead. 331(one option per line, with or without C<--> prefix) and specify this
332bundle file instead.
284 333
285For example, the command given earlier could also look like this: 334For example, the command given earlier to link a new F<perl> could also
335look like this:
286 336
287 staticperl mkperl httpd.bundle 337 staticperl mkperl httpd.bundle
288 338
289And all options could be in F<httpd.bundle>: 339With all options stored in the F<httpd.bundle> file (one option per line,
290 340everything after the option is an argument):
341
291 use "Config_heavy.pl" 342 use "Config_heavy.pl"
292 use AnyEvent::Impl::Perl 343 use AnyEvent::Impl::Perl
293 use AnyEvent::HTTPD 344 use AnyEvent::HTTPD
294 use URI::http 345 use URI::http
295 add eg/httpd httpd.pm 346 add eg/httpd httpd.pm
296 347
297All options that specify modules or files to be added are processed in the 348All options that specify modules or files to be added are processed in the
298order given on the command line (that affects the C<--use> and C<--eval> 349order given on the command line.
299options at the moment).
300 350
301=head3 PACKAGE SELECTION WORKFLOW 351=head3 BUNDLE CREATION WORKFLOW / STATICPELR MKBUNDLE OPTIONS
302 352
303F<staticperl mkbundle> has a number of options to control package 353F<staticperl mkbundle> works by first assembling a list of candidate
304selection. This section describes how they interact with each other. Also, 354files and modules to include, then filtering them by include/exclude
305since I am still a newbie w.r.t. these issues, maybe future versions of 355patterns. The remaining modules (together with their direct dependencies,
306F<staticperl> will change this, so watch out :) 356such as link libraries and L<AutoLoader> files) are then converted into
357bundle files suitable for embedding. F<staticperl mkbundle> can then
358optionally build a new perl interpreter or a standalone application.
307 359
308The idiom "in order" means "in order that they are specified on the
309commandline". If you use a bundle specification file, then the options
310will be processed as if they were given in place of the bundle file name.
311
312=over 4 360=over 4
313 361
314=item 1. apply all C<--use>, C<--eval>, C<--add>, C<--addbin> and 362=item Step 0: Generic argument processing.
315C<--incglob> options, in order.
316 363
317In addition, C<--use> and C<--eval> dependencies will be added when the 364The following options influence F<staticperl mkbundle> itself.
318options are processed.
319 365
320=item 2. apply all C<--include> and C<--exclude> options, in order.
321
322All this step does is potentially reduce the number of files already
323selected or found in phase 1.
324
325=item 3. find all modules (== F<.pm> files), gather their static archives
326(F<.a>) and AutoLoader splitfiles (F<.ix> and F<.al> files), find any
327extra libraries they need for linking (F<extralibs.ld>) and optionally
328evaluate any F<.packlist> files.
329
330This step is required to link against XS extensions and also adds files
331required for L<AutoLoader> to do it's job.
332
333=back
334
335After this, all the files selected for bundling will be read and processed
336(stripped), the bundle files will be written, and optionally a new F<perl>
337or application binary will be linked.
338
339=head3 MKBUNDLE OPTIONS
340
341=over 4 366=over 4
342 367
343=item --verbose | -v 368=item C<--verbose> | C<-v>
344 369
345Increases the verbosity level by one (the default is C<1>). 370Increases the verbosity level by one (the default is C<1>).
346 371
347=item --quiet | -q 372=item C<--quiet> | C<-q>
348 373
349Decreases the verbosity level by one. 374Decreases the verbosity level by one.
350 375
376=item any other argument
377
378Any other argument is interpreted as a bundle specification file, which
379supports all options (without extra quoting), one option per line, in the
380format C<option> or C<option argument>. They will effectively be expanded
381and processed as if they were directly written on the command line, in
382place of the file name.
383
384=back
385
386=item Step 1: gather candidate files and modules
387
388In this step, modules, perl libraries (F<.pl> files) and other files are
389selected for inclusion in the bundle. The relevant options are executed
390in order (this makes a difference mostly for C<--eval>, which can rely on
391earlier C<--use> options to have been executed).
392
393=over 4
394
395=item C<--use> F<module> | C<-M>F<module>
396
397Include the named module or perl library and trace direct
398dependencies. This is done by loading the module in a subprocess and
399tracing which other modules and files it actually loads.
400
401Example: include AnyEvent and AnyEvent::Impl::Perl.
402
403 staticperl mkbundle --use AnyEvent --use AnyEvent::Impl::Perl
404
405Sometimes you want to load old-style "perl libraries" (F<.pl> files), or
406maybe other weirdly named files. To support this, the C<--use> option
407actually tries to do what you mean, depending on the string you specify:
408
409=over 4
410
411=item a possibly valid module name, e.g. F<common::sense>, F<Carp>,
412F<Coro::Mysql>.
413
414If the string contains no quotes, no F</> and no F<.>, then C<--use>
415assumes that it is a normal module name. It will create a new package and
416evaluate a C<use module> in it, i.e. it will load the package and do a
417default import.
418
419The import step is done because many modules trigger more dependencies
420when something is imported than without.
421
422=item anything that contains F</> or F<.> characters,
423e.g. F<utf8_heavy.pl>, F<Module/private/data.pl>.
424
425The string will be quoted and passed to require, as if you used C<require
426$module>. Nothing will be imported.
427
428=item "path" or 'path', e.g. C<"utf8_heavy.pl">.
429
430If you enclose the name into single or double quotes, then the quotes will
431be removed and the resulting string will be passed to require. This syntax
432is form compatibility with older versions of staticperl and should not be
433used anymore.
434
435=back
436
437Example: C<use> AnyEvent::Socket, once using C<use> (importing the
438symbols), and once via C<require>, not importing any symbols. The first
439form is preferred as many modules load some extra dependencies when asked
440to export symbols.
441
442 staticperl mkbundle -MAnyEvent::Socket # use + import
443 staticperl mkbundle -MAnyEvent/Socket.pm # require only
444
445Example: include the required files for F<perl -V> to work in all its
446glory (F<Config.pm> is included automatically by the dependency tracker).
447
448 # shell command
449 staticperl mkbundle -MConfig_heavy.pl
450
451 # bundle specification file
452 use Config_heavy.pl
453
454The C<-M>module syntax is included as a convenience that might be easier
455to remember than C<--use> - it's the same switch as perl itself uses
456to load modules. Or maybe it confuses people. Time will tell. Or maybe
457not. Sigh.
458
459=item C<--eval> "perl code" | C<-e> "perl code"
460
461Sometimes it is easier (or necessary) to specify dependencies using perl
462code, or maybe one of the modules you use need a special use statement. In
463that case, you can use C<--eval> to execute some perl snippet or set some
464variables or whatever you need. All files C<require>'d or C<use>'d while
465executing the snippet are included in the final bundle.
466
467Keep in mind that F<mkbundle> will not import any symbols from the modules
468named by the C<--use> option, so do not expect the symbols from modules
469you C<--use>'d earlier on the command line to be available.
470
471Example: force L<AnyEvent> to detect a backend and therefore include it
472in the final bundle.
473
474 staticperl mkbundle --eval 'use AnyEvent; AnyEvent::detect'
475
476 # or like this
477 staticperl mkbundle -MAnyEvent --eval 'AnyEvent::detect'
478
479Example: use a separate "bootstrap" script that C<use>'s lots of modules
480and also include this in the final bundle, to be executed automatically
481when the interpreter is initialised.
482
483 staticperl mkbundle --eval 'do "bootstrap"' --boot bootstrap
484
485=item C<--boot> F<filename>
486
487Include the given file in the bundle and arrange for it to be
488executed (using C<require>) before the main program when the new perl
489is initialised. This can be used to modify C<@INC> or do similar
490modifications before the perl interpreter executes scripts given on the
491command line (or via C<-e>). This works even in an embedded interpreter -
492the file will be executed during interpreter initialisation in that case.
493
494=item C<--incglob> pattern
495
496This goes through all standard library directories and tries to match any
497F<.pm> and F<.pl> files against the extended glob pattern (see below). If
498a file matches, it is added. The pattern is matched against the full path
499of the file (sans the library directory prefix), e.g. F<Sys/Syslog.pm>.
500
501This is very useful to include "everything":
502
503 --incglob '*'
504
505It is also useful for including perl libraries, or trees of those, such as
506the unicode database files needed by some perl built-ins, the regex engine
507and other modules.
508
509 --incglob '/unicore/**.pl'
510
511=item C<--add> F<file> | C<--add> "F<file> alias"
512
513Adds the given (perl) file into the bundle (and optionally call it
514"alias"). The F<file> is either an absolute path or a path relative to the
515current directory. If an alias is specified, then this is the name it will
516use for C<@INC> searches, otherwise the path F<file> will be used as the
517internal name.
518
519This switch is used to include extra files into the bundle.
520
521Example: embed the file F<httpd> in the current directory as F<httpd.pm>
522when creating the bundle.
523
524 staticperl mkperl --add "httpd httpd.pm"
525
526 # can be accessed via "use httpd"
527
528Example: add a file F<initcode> from the current directory.
529
530 staticperl mkperl --add 'initcode &initcode'
531
532 # can be accessed via "do '&initcode'"
533
534Example: add local files as extra modules in the bundle.
535
536 # specification file
537 add file1 myfiles/file1.pm
538 add file2 myfiles/file2.pm
539 add file3 myfiles/file3.pl
540
541 # then later, in perl, use
542 use myfiles::file1;
543 require myfiles::file2;
544 my $res = do "myfiles/file3.pl";
545
546=item C<--binadd> F<file> | C<--add> "F<file> alias"
547
548Just like C<--add>, except that it treats the file as binary and adds it
549without any postprocessing (perl files might get stripped to reduce their
550size).
551
552If you specify an alias you should probably add a C<&> prefix to avoid
553clashing with embedded perl files (whose paths never start with C<&>),
554and/or use a special directory prefix, such as C<&res/name>.
555
556You can later get a copy of these files by calling C<staticperl::find
557"alias">.
558
559An alternative way to embed binary files is to convert them to perl and
560use C<do> to get the contents - this method is a bit cumbersome, but works
561both inside and outside of a staticperl bundle:
562
563 # a "binary" file, call it "bindata.pl"
564 <<'SOME_MARKER'
565 binary data NOT containing SOME_MARKER
566 SOME_MARKER
567
568 # load the binary
569 chomp (my $data = do "bindata.pl");
570
571=back
572
573=item Step 2: filter all files using C<--include> and C<--exclude> options.
574
575After all candidate files and modules are added, they are I<filtered>
576by a combination of C<--include> and C<--exclude> patterns (there is an
577implicit C<--include *> at the end, so if no filters are specified, all
578files are included).
579
580All that this step does is potentially reduce the number of files that are
581to be included - no new files are added during this step.
582
583=over 4
584
585=item C<--include> pattern | C<-i> pattern | C<--exclude> pattern | C<-x> pattern
586
587These specify an include or exclude pattern to be applied to the candidate
588file list. An include makes sure that the given files will be part of the
589resulting file set, an exclude will exclude remaining files. The patterns
590are "extended glob patterns" (see below).
591
592The patterns are applied "in order" - files included via earlier
593C<--include> specifications cannot be removed by any following
594C<--exclude>, and likewise, and file excluded by an earlier C<--exclude>
595cannot be added by any following C<--include>.
596
597For example, to include everything except C<Devel> modules, but still
598include F<Devel::PPPort>, you could use this:
599
600 --incglob '*' -i '/Devel/PPPort.pm' -x '/Devel/**'
601
602=back
603
604=item Step 3: add any extra or "hidden" dependencies.
605
606F<staticperl> currently knows about three extra types of depdendencies
607that are added automatically. Only one (F<.packlist> files) is currently
608optional and can be influenced, the others are always included:
609
610=over 4
611
612=item C<--usepacklists>
613
614Read F<.packlist> files for each distribution that happens to match a
615module name you specified. Sounds weird, and it is, so expect semantics to
616change somehow in the future.
617
618The idea is that most CPAN distributions have a F<.pm> file that matches
619the name of the distribution (which is rather reasonable after all).
620
621If this switch is enabled, then if any of the F<.pm> files that have been
622selected match an install distribution, then all F<.pm>, F<.pl>, F<.al>
623and F<.ix> files installed by this distribution are also included.
624
625For example, using this switch, when the L<URI> module is specified, then
626all L<URI> submodules that have been installed via the CPAN distribution
627are included as well, so you don't have to manually specify them.
628
629=item L<AutoLoader> splitfiles
630
631Some modules use L<AutoLoader> - less commonly (hopefully) used functions
632are split into separate F<.al> files, and an index (F<.ix>) file contains
633the prototypes.
634
635Both F<.ix> and F<.al> files will be detected automatically and added to
636the bundle.
637
638=item link libraries (F<.a> files)
639
640Modules using XS (or any other non-perl language extension compiled at
641installation time) will have a static archive (typically F<.a>). These
642will automatically be added to the linker options in F<bundle.ldopts>.
643
644Should F<staticperl> find a dynamic link library (typically F<.so>) it
645will warn about it - obviously this shouldn't happen unless you use
646F<staticperl> on the wrong perl, or one (probably wrongly) configured to
647use dynamic loading.
648
649=item extra libraries (F<extralibs.ld>)
650
651Some modules need linking against external libraries - these are found in
652F<extralibs.ld> and added to F<bundle.ldopts>.
653
654=back
655
656=item Step 4: write bundle files and optionally link a program
657
658At this point, the select files will be read, processed (stripped) and
659finally the bundle files get written to disk, and F<staticperl mkbundle>
660is normally finished. Optionally, it can go a step further and either link
661a new F<perl> binary with all selected modules and files inside, or build
662a standalone application.
663
664Both the contents of the bundle files and any extra linking is controlled
665by these options:
666
667=over 4
668
351=item --strip none|pod|ppi 669=item C<--strip> C<none>|C<pod>|C<ppi>
352 670
353Specify the stripping method applied to reduce the file of the perl 671Specify the stripping method applied to reduce the file of the perl
354sources included. 672sources included.
355 673
356The default is C<pod>, which uses the L<Pod::Strip> module to remove all 674The default is C<pod>, which uses the L<Pod::Strip> module to remove all
367Last not least, if you need accurate line numbers in error messages, 685Last not least, if you need accurate line numbers in error messages,
368or in the unlikely case where C<pod> is too slow, or some module gets 686or in the unlikely case where C<pod> is too slow, or some module gets
369mistreated, you can specify C<none> to not mangle included perl sources in 687mistreated, you can specify C<none> to not mangle included perl sources in
370any way. 688any way.
371 689
372=item --perl 690=item C<--perl>
373 691
374After writing out the bundle files, try to link a new perl interpreter. It 692After writing out the bundle files, try to link a new perl interpreter. It
375will be called F<perl> and will be left in the current working 693will be called F<perl> and will be left in the current working
376directory. The bundle files will be removed. 694directory. The bundle files will be removed.
377 695
378This switch is automatically used when F<staticperl> is invoked with the 696This switch is automatically used when F<staticperl> is invoked with the
379C<mkperl> command (instead of C<mkbundle>): 697C<mkperl> command instead of C<mkbundle>.
380 698
381 # build a new ./perl with only common::sense in it - very small :) 699Example: build a new F<./perl> binary with only L<common::sense> inside -
700it will be even smaller than the standard perl interpreter as none of the
701modules of the base distribution (such as L<Fcntl>) will be included.
702
382 staticperl mkperl -Mcommon::sense 703 staticperl mkperl -Mcommon::sense
383 704
384=item --app name 705=item C<--app> F<name>
385 706
386After writing out the bundle files, try to link a new standalone 707After writing out the bundle files, try to link a new standalone
387program. It will be called C<name>, and the bundle files get removed after 708program. It will be called C<name>, and the bundle files get removed after
388linking it. 709linking it.
710
711This switch is automatically used when F<staticperl> is invoked with the
712C<mkapp> command instead of C<mkbundle>.
389 713
390The difference to the (mutually exclusive) C<--perl> option is that the 714The difference to the (mutually exclusive) C<--perl> option is that the
391binary created by this option will not try to act as a perl interpreter - 715binary created by this option will not try to act as a perl interpreter -
392instead it will simply initialise the perl interpreter, clean it up and 716instead it will simply initialise the perl interpreter, clean it up and
393exit. 717exit.
394 718
395This switch is automatically used when F<staticperl> is invoked with the 719This means that, by default, it will do nothing but burn a few CPU cycles
396C<mkapp> command (instead of C<mkbundle>):
397
398To let it do something useful you I<must> add some boot code, e.g. with 720- for it to do something useful you I<must> add some boot code, e.g. with
399the C<--boot> option. 721the C<--boot> option.
400 722
401Example: create a standalone perl binary that will execute F<appfile> when 723Example: create a standalone perl binary called F<./myexe> that will
402it is started. 724execute F<appfile> when it is started.
403 725
404 staticperl mkbundle --app myexe --boot appfile 726 staticperl mkbundle --app myexe --boot appfile
405 727
406=item --use module | -Mmodule 728=item C<--ignore-env>
407 729
408Include the named module and all direct dependencies. This is done by 730Generates extra code to unset some environment variables before
409C<require>'ing the module in a subprocess and tracing which other modules 731initialising/running perl. Perl supports a lot of environment variables
410and files it actually loads. If the module uses L<AutoLoader>, then all 732that might alter execution in ways that might be undesirablre for
411splitfiles will be included as well. 733standalone applications, and this option removes those known to cause
734trouble.
412 735
413Example: include AnyEvent and AnyEvent::Impl::Perl. 736Specifically, these are removed:
414 737
415 staticperl mkbundle --use AnyEvent --use AnyEvent::Impl::Perl 738C<PERL_HASH_SEED_DEBUG> and C<PERL_DEBUG_MSTATS> can cause underaible
739output, C<PERL5OPT>, C<PERL_DESTRUCT_LEVEL>, C<PERL_HASH_SEED> and
740C<PERL_SIGNALS> can alter execution significantly, and C<PERL_UNICODE>,
741C<PERLIO_DEBUG> and C<PERLIO> can affect input and output.
416 742
417Sometimes you want to load old-style "perl libraries" (F<.pl> files), or 743The variables C<PERL_LIB> and C<PERL5_LIB> are always ignored because the
418maybe other weirdly named files. To do that, you need to quote the name in 744startup code used by F<staticperl> overrides C<@INC> in all cases.
419single or double quotes. When given on the command line, you probably need
420to quote once more to avoid your shell interpreting it. Common cases that
421need this are F<Config_heavy.pl> and F<utf8_heavy.pl>.
422 745
423Example: include the required files for F<perl -V> to work in all its 746This option will not make your program more secure (unless you are
424glory (F<Config.pm> is included automatically by this). 747running with elevated privileges), but it will reduce the surprise effect
748when a user has these environment variables set and doesn't expect your
749standalone program to act like a perl interpreter.
425 750
426 # bourne shell
427 staticperl mkbundle --use '"Config_heavy.pl"'
428
429 # bundle specification file
430 use "Config_heavy.pl"
431
432The C<-Mmodule> syntax is included as an alias that might be easier to
433remember than C<use>. Or maybe it confuses people. Time will tell. Or
434maybe not. Argh.
435
436=item --eval "perl code" | -e "perl code"
437
438Sometimes it is easier (or necessary) to specify dependencies using perl
439code, or maybe one of the modules you use need a special use statement. In
440that case, you can use C<eval> to execute some perl snippet or set some
441variables or whatever you need. All files C<require>'d or C<use>'d in the
442script are included in the final bundle.
443
444Keep in mind that F<mkbundle> will only C<require> the modules named
445by the C<--use> option, so do not expect the symbols from modules you
446C<--use>'d earlier on the command line to be available.
447
448Example: force L<AnyEvent> to detect a backend and therefore include it
449in the final bundle.
450
451 staticperl mkbundle --eval 'use AnyEvent; AnyEvent::detect'
452
453 # or like this
454 staticperl mkbundle -MAnyEvent --eval 'use AnyEvent; AnyEvent::detect'
455
456Example: use a separate "bootstrap" script that C<use>'s lots of modules
457and include this in the final bundle, to be executed automatically.
458
459 staticperl mkbundle --eval 'do "bootstrap"' --boot bootstrap
460
461=item --boot filename
462
463Include the given file in the bundle and arrange for it to be executed
464(using a C<require>) before anything else when the new perl is
465initialised. This can be used to modify C<@INC> or anything else before
466the perl interpreter executes scripts given on the command line (or via
467C<-e>). This works even in an embedded interpreter.
468
469=item --usepacklist
470
471Read F<.packlist> files for each distribution that happens to match a
472module name you specified. Sounds weird, and it is, so expect semantics to
473change somehow in the future.
474
475The idea is that most CPAN distributions have a F<.pm> file that matches
476the name of the distribution (which is rather reasonable after all).
477
478If this switch is enabled, then if any of the F<.pm> files that have been
479selected match an install distribution, then all F<.pm>, F<.pl>, F<.al>
480and F<.ix> files installed by this distribution are also included.
481
482For example, using this switch, when the L<URI> module is specified, then
483all L<URI> submodules that have been installed via the CPAN distribution
484are included as well, so you don't have to manually specify them.
485
486=item --incglob pattern
487
488This goes through all library directories and tries to match any F<.pm>
489and F<.pl> files against the extended glob pattern (see below). If a file
490matches, it is added. This switch will automatically detect L<AutoLoader>
491files and the required link libraries for XS modules, but it will I<not>
492scan the file for dependencies (at the moment).
493
494This is mainly useful to include "everything":
495
496 --incglob '*'
497
498Or to include perl libraries, or trees of those, such as the unicode
499database files needed by many other modules:
500
501 --incglob '/unicore/**.pl'
502
503=item --add file | --add "file alias"
504
505Adds the given (perl) file into the bundle (and optionally call it
506"alias"). This is useful to include any custom files into the bundle.
507
508Example: embed the file F<httpd> as F<httpd.pm> when creating the bundle.
509
510 staticperl mkperl --add "httpd httpd.pm"
511
512It is also a great way to add any custom modules:
513
514 # specification file
515 add file1 myfiles/file1
516 add file2 myfiles/file2
517 add file3 myfiles/file3
518
519=item --binadd file | --add "file alias"
520
521Just like C<--add>, except that it treats the file as binary and adds it
522without any processing.
523
524You should probably add a C</> prefix to avoid clashing with embedded
525perl files (whose paths do not start with C</>), and/or use a special
526directory, such as C</res/name>.
527
528You can later get a copy of these files by calling C<staticperl::find
529"alias">.
530
531=item --include pattern | -i pattern | --exclude pattern | -x pattern
532
533These two options define an include/exclude filter that is used after all
534files selected by the other options have been found. Each include/exclude
535is applied to all files found so far - an include makes sure that the
536given files will be part of the resulting file set, an exclude will
537exclude files. The patterns are "extended glob patterns" (see below).
538
539For example, to include everything, except C<Devel> modules, but still
540include F<Devel::PPPort>, you could use this:
541
542 --incglob '*' -i '/Devel/PPPort.pm' -x '/Devel/**'
543
544=item --static 751=item C<--static>
545 752
546When C<--perl> is also given, link statically instead of dynamically. The 753Add C<-static> to F<bundle.ldopts>, which means a fully static (if
754supported by the OS) executable will be created. This is not immensely
755useful when just creating the bundle files, but is most useful when
756linking a binary with the C<--perl> or C<--app> options.
757
547default is to link the new perl interpreter fully dynamic (that means all 758The default is to link the new binary dynamically (that means all perl
548perl modules are linked statically, but all external libraries are still 759modules are linked statically, but all external libraries are still
549referenced dynamically). 760referenced dynamically).
550 761
551Keep in mind that Solaris doesn't support static linking at all, and 762Keep in mind that Solaris doesn't support static linking at all, and
552systems based on GNU libc don't really support it in a usable fashion 763systems based on GNU libc don't really support it in a very usable
553either. Try uClibc if you want to create fully statically linked 764fashion either. Try uClibc if you want to create fully statically linked
554executables, or try the C<--staticlibs> option to link only some libraries 765executables, or try the C<--staticlib> option to link only some libraries
555statically. 766statically.
556 767
557=item --staticlib libname 768=item C<--staticlib> libname
558 769
559When not linking fully statically, this option allows you to link specific 770When not linking fully statically, this option allows you to link specific
560libraries statically. What it does is simply replace all occurances of 771libraries statically. What it does is simply replace all occurrences of
561C<-llibname> with the GCC-specific C<-Wl,-Bstatic -llibname -Wl,-Bdynamic> 772C<-llibname> with the GCC-specific C<-Wl,-Bstatic -llibname -Wl,-Bdynamic>
562option. 773option.
563 774
564This will have no effect unless the library is actually linked against, 775This will have no effect unless the library is actually linked against,
565specifically, C<--staticlib> will not link against the named library 776specifically, C<--staticlib> will not link against the named library
566unless it would be linked against anyway. 777unless it would be linked against anyway.
567 778
568Example: link libcrypt statically into the binary. 779Example: link libcrypt statically into the final binary.
569 780
570 staticperl mkperl -MIO::AIO --staticlib crypt 781 staticperl mkperl -MIO::AIO --staticlib crypt
571 782
572 # ldopts might nwo contain: 783 # ldopts might now contain:
573 # -lm -Wl,-Bstatic -lcrypt -Wl,-Bdynamic -lpthread 784 # -lm -Wl,-Bstatic -lcrypt -Wl,-Bdynamic -lpthread
574 785
575=item any other argument 786=back
576
577Any other argument is interpreted as a bundle specification file, which
578supports most long options (without extra quoting), one option per line.
579 787
580=back 788=back
581 789
582=head3 EXTENDED GLOB PATTERNS 790=head3 EXTENDED GLOB PATTERNS
583 791
597=item Patterns not starting with F</> will be anchored at the end of the path. 805=item Patterns not starting with F</> will be anchored at the end of the path.
598 806
599That is, F<idna.pl> will match any file called F<idna.pl> anywhere in the 807That is, F<idna.pl> will match any file called F<idna.pl> anywhere in the
600hierarchy, but not any directories of the same name. 808hierarchy, but not any directories of the same name.
601 809
602=item A F<*> matches any single component. 810=item A F<*> matches anything within a single path component.
603 811
604That is, F</unicore/*.pl> would match all F<.pl> files directly inside 812That is, F</unicore/*.pl> would match all F<.pl> files directly inside
605C</unicore>, not any deeper level F<.pl> files. Or in other words, F<*> 813C</unicore>, not any deeper level F<.pl> files. Or in other words, F<*>
606will not match slashes. 814will not match slashes.
607 815
682installation, you can set any environment variable you want - some modules 890installation, you can set any environment variable you want - some modules
683(such as L<Coro> or L<EV>) use environment variables for further tweaking. 891(such as L<Coro> or L<EV>) use environment variables for further tweaking.
684 892
685=item C<PERL_VERSION> 893=item C<PERL_VERSION>
686 894
687The perl version to install - default is currently C<5.12.2>, but C<5.8.9> 895The perl version to install - default is currently C<5.12.3>, but C<5.8.9>
688is also a good choice (5.8.9 is much smaller than 5.12.2, while 5.10.1 is 896is also a good choice (5.8.9 is much smaller than 5.12.3, while 5.10.1 is
689about as big as 5.12.2). 897about as big as 5.12.3).
690 898
691=item C<PERL_PREFIX> 899=item C<PERL_PREFIX>
692 900
693The prefix where perl gets installed (default: F<$STATICPERL/perl>), 901The prefix where perl gets installed (default: F<$STATICPERL/perl>),
694i.e. where the F<bin> and F<lib> subdirectories will end up. 902i.e. where the F<bin> and F<lib> subdirectories will end up.
703 911
704More commonly, you would either activate 64 bit integer support 912More commonly, you would either activate 64 bit integer support
705(C<-Duse64bitint>), or disable large files support (-Uuselargefiles), to 913(C<-Duse64bitint>), or disable large files support (-Uuselargefiles), to
706reduce filesize further. 914reduce filesize further.
707 915
708=item C<PERL_CPPFLAGS>, C<PERL_OPTIMIZE>, C<PERL_LDFLAGS>, C<PERL_LIBS> 916=item C<PERL_CC>, C<PERL_CCFLAGS>, C<PERL_OPTIMIZE>, C<PERL_LDFLAGS>, C<PERL_LIBS>
709 917
710These flags are passed to perl's F<Configure> script, and are generally 918These flags are passed to perl's F<Configure> script, and are generally
711optimised for small size (at the cost of performance). Since they also 919optimised for small size (at the cost of performance). Since they also
712contain subtle workarounds around various build issues, changing these 920contain subtle workarounds around various build issues, changing these
713usually requires understanding their default values - best look at the top 921usually requires understanding their default values - best look at
714of the F<staticperl> script for more info on these. 922the top of the F<staticperl> script for more info on these, and use a
923F<~/.staticperlrc> to override them.
924
925Most of the variables override (or modify) the corresponding F<Configure>
926variable, except C<PERL_CCFLAGS>, which gets appended.
927
928You should have a look near the beginning of the F<staticperl> script -
929staticperl tries to default C<PERL_OPTIMIZE> to some psace-saving options
930suitable for newer gcc versions. For other compilers or older versions you
931need to adjust these, for example, in your F<~/.staticperlrc>.
715 932
716=back 933=back
717 934
718=head4 Variables you probably I<do not want> to override 935=head4 Variables you probably I<do not want> to override
719 936
720=over 4 937=over 4
938
939=item C<MAKE>
940
941The make command to use - default is C<make>.
721 942
722=item C<MKBUNDLE> 943=item C<MKBUNDLE>
723 944
724Where F<staticperl> writes the C<mkbundle> command to 945Where F<staticperl> writes the C<mkbundle> command to
725(default: F<$STATICPERL/mkbundle>). 946(default: F<$STATICPERL/mkbundle>).
734=head3 OVERRIDABLE HOOKS 955=head3 OVERRIDABLE HOOKS
735 956
736In addition to environment variables, it is possible to provide some 957In addition to environment variables, it is possible to provide some
737shell functions that are called at specific times. To provide your own 958shell functions that are called at specific times. To provide your own
738commands, just define the corresponding function. 959commands, just define the corresponding function.
960
961The actual order in which hooks are invoked during a full install
962from scratch is C<preconfigure>, C<patchconfig>, C<postconfigure>,
963C<postbuild>, C<postinstall>.
739 964
740Example: install extra modules from CPAN and from some directories 965Example: install extra modules from CPAN and from some directories
741at F<staticperl install> time. 966at F<staticperl install> time.
742 967
743 postinstall() { 968 postinstall() {
750 975
751=over 4 976=over 4
752 977
753=item preconfigure 978=item preconfigure
754 979
755Called just before running F<./Configur> in the perl source 980Called just before running F<./Configure> in the perl source
756directory. Current working directory is the perl source directory. 981directory. Current working directory is the perl source directory.
757 982
758This can be used to set any C<PERL_xxx> variables, which might be costly 983This can be used to set any C<PERL_xxx> variables, which might be costly
759to compute. 984to compute.
760 985
986=item patchconfig
987
988Called after running F<./Configure> in the perl source directory to create
989F<./config.sh>, but before running F<./Configure -S> to actually apply the
990config. Current working directory is the perl source directory.
991
992Can be used to tailor/patch F<config.sh> or do any other modifications.
993
761=item postconfigure 994=item postconfigure
762 995
763Called after configuring, but before building perl. Current working 996Called after configuring, but before building perl. Current working
764directory is the perl source directory. 997directory is the perl source directory.
765
766Could be used to tailor/patch config.sh (followed by F<sh Configure -S>)
767or do any other modifications.
768 998
769=item postbuild 999=item postbuild
770 1000
771Called after building, but before installing perl. Current working 1001Called after building, but before installing perl. Current working
772directory is the perl source directory. 1002directory is the perl source directory.
810A header file that contains the prototypes of the few symbols "exported" 1040A header file that contains the prototypes of the few symbols "exported"
811by bundle.c, and also exposes the perl headers to the application. 1041by bundle.c, and also exposes the perl headers to the application.
812 1042
813=over 4 1043=over 4
814 1044
815=item staticperl_init () 1045=item staticperl_init (xs_init = 0)
816 1046
817Initialises the perl interpreter. You can use the normal perl functions 1047Initialises the perl interpreter. You can use the normal perl functions
818after calling this function, for example, to define extra functions or 1048after calling this function, for example, to define extra functions or
819to load a .pm file that contains some initialisation code, or the main 1049to load a .pm file that contains some initialisation code, or the main
820program function: 1050program function:
827 } 1057 }
828 1058
829 static void 1059 static void
830 run_myapp(void) 1060 run_myapp(void)
831 { 1061 {
832 staticperl_init (); 1062 staticperl_init (0);
833 newXSproto ("myapp::xsfunction", xsfunction, __FILE__, "$$;$"); 1063 newXSproto ("myapp::xsfunction", xsfunction, __FILE__, "$$;$");
834 eval_pv ("require myapp::main", 1); // executes "myapp/main.pm" 1064 eval_pv ("require myapp::main", 1); // executes "myapp/main.pm"
835 } 1065 }
836 1066
1067When your bootcode already wants to access some XS functions at
1068compiletime, then you need to supply an C<xs_init> function pointer that
1069is called as soon as perl is initialised enough to define XS functions,
1070but before the preamble code is executed:
1071
1072 static void
1073 xs_init (pTHX)
1074 {
1075 newXSproto ("myapp::xsfunction", xsfunction, __FILE__, "$$;$");
1076 }
1077
1078 static void
1079 run_myapp(void)
1080 {
1081 staticperl_init (xs_init);
1082 }
1083
1084=item staticperl_cleanup ()
1085
1086In the unlikely case that you want to destroy the perl interpreter, here
1087is the corresponding function.
1088
837=item staticperl_xs_init (pTHX) 1089=item staticperl_xs_init (pTHX)
838 1090
839Sometimes you need direct control over C<perl_parse> and C<perl_run>, in 1091Sometimes you need direct control over C<perl_parse> and C<perl_run>, in
840which case you do not want to use C<staticperl_init> but call them on your 1092which case you do not want to use C<staticperl_init> but call them on your
841own. 1093own.
842 1094
843Then you need this function - either pass it directly as the C<xs_init> 1095Then you need this function - either pass it directly as the C<xs_init>
844function to C<perl_parse>, or call it from your own C<xs_init> function. 1096function to C<perl_parse>, or call it as one of the first things from your
845 1097own C<xs_init> function.
846=item staticperl_cleanup ()
847
848In the unlikely case that you want to destroy the perl interpreter, here
849is the corresponding function.
850 1098
851=item PerlInterpreter *staticperl 1099=item PerlInterpreter *staticperl
852 1100
853The perl interpreter pointer used by staticperl. Not normally so useful, 1101The perl interpreter pointer used by staticperl. Not normally so useful,
854but there it is. 1102but there it is.
890 1138
891Returns the list of all paths embedded in this binary. 1139Returns the list of all paths embedded in this binary.
892 1140
893=back 1141=back
894 1142
895=head1 FULLY STATIC BINARIES - BUILDROOT 1143=head1 FULLY STATIC BINARIES - UCLIBC AND BUILDROOT
896 1144
897To make truly static (Linux-) libraries, you might want to have a look at 1145To make truly static (Linux-) libraries, you might want to have a look at
898buildroot (L<http://buildroot.uclibc.org/>). 1146buildroot (L<http://buildroot.uclibc.org/>).
899 1147
900Buildroot is primarily meant to set up a cross-compile environment (which 1148Buildroot is primarily meant to set up a cross-compile environment (which
961 1209
962Some functionality in the utf8 module, such as swash handling (used 1210Some functionality in the utf8 module, such as swash handling (used
963for unicode character ranges in regexes) is implemented in the 1211for unicode character ranges in regexes) is implemented in the
964C<"utf8_heavy.pl"> library: 1212C<"utf8_heavy.pl"> library:
965 1213
966 -M'"utf8_heavy.pl"' 1214 -Mutf8_heavy.pl
967 1215
968Many Unicode properties in turn are defined in separate modules, 1216Many Unicode properties in turn are defined in separate modules,
969such as C<"unicore/Heavy.pl"> and more specific data tables such as 1217such as C<"unicore/Heavy.pl"> and more specific data tables such as
970C<"unicore/To/Digit.pl"> or C<"unicore/lib/Perl/Word.pl">. These tables 1218C<"unicore/To/Digit.pl"> or C<"unicore/lib/Perl/Word.pl">. These tables
971are big (7MB uncompressed, although F<staticperl> contains special 1219are big (7MB uncompressed, although F<staticperl> contains special
972handling for those files), so including them on demand by your application 1220handling for those files), so including them on demand by your application
973only might pay off. 1221only might pay off.
974 1222
975To simply include the whole unicode database, use: 1223To simply include the whole unicode database, use:
976 1224
977 --incglob '/unicore/*.pl' 1225 --incglob '/unicore/**.pl'
978 1226
979=item AnyEvent 1227=item AnyEvent
980 1228
981AnyEvent needs a backend implementation that it will load in a delayed 1229AnyEvent needs a backend implementation that it will load in a delayed
982fashion. The L<AnyEvent::Impl::Perl> backend is the default choice 1230fashion. The L<AnyEvent::Impl::Perl> backend is the default choice
987 1235
988If you want to handle IRIs or IDNs (L<AnyEvent::Util> punycode and idn 1236If you want to handle IRIs or IDNs (L<AnyEvent::Util> punycode and idn
989functions), you also need to include C<"AnyEvent/Util/idna.pl"> and 1237functions), you also need to include C<"AnyEvent/Util/idna.pl"> and
990C<"AnyEvent/Util/uts46data.pl">. 1238C<"AnyEvent/Util/uts46data.pl">.
991 1239
992Or you can use C<--usepacklist> and specify C<-MAnyEvent> to include 1240Or you can use C<--usepacklists> and specify C<-MAnyEvent> to include
993everything. 1241everything.
1242
1243=item Cairo
1244
1245See Glib, same problem, same solution.
994 1246
995=item Carp 1247=item Carp
996 1248
997Carp had (in older versions of perl) a dependency on L<Carp::Heavy>. As of 1249Carp had (in older versions of perl) a dependency on L<Carp::Heavy>. As of
998perl 5.12.2 (maybe earlier), this dependency no longer exists. 1250perl 5.12.2 (maybe earlier), this dependency no longer exists.
1001 1253
1002The F<perl -V> switch (as well as many modules) needs L<Config>, which in 1254The F<perl -V> switch (as well as many modules) needs L<Config>, which in
1003turn might need L<"Config_heavy.pl">. Including the latter gives you 1255turn might need L<"Config_heavy.pl">. Including the latter gives you
1004both. 1256both.
1005 1257
1258=item Glib
1259
1260Glib literally requires Glib to be installed already to build - it tries
1261to fake this by running Glib out of the build directory before being
1262built. F<staticperl> tries to work around this by forcing C<MAN1PODS> and
1263C<MAN3PODS> to be empty via the C<PERL_MM_OPT> environment variable.
1264
1265=item Gtk2
1266
1267See Pango, same problems, same solution.
1268
1269=item Pango
1270
1271In addition to the C<MAN3PODS> problem in Glib, Pango also routes around
1272L<ExtUtils::MakeMaker> by compiling its files on its own. F<staticperl>
1273tries to patch L<ExtUtils::MM_Unix> to route around Pango.
1274
1006=item Term::ReadLine::Perl 1275=item Term::ReadLine::Perl
1007 1276
1008Also needs L<Term::ReadLine::readline>, or C<--usepacklist>. 1277Also needs L<Term::ReadLine::readline>, or C<--usepacklists>.
1009 1278
1010=item URI 1279=item URI
1011 1280
1012URI implements schemes as separate modules - the generic URL scheme is 1281URI implements schemes as separate modules - the generic URL scheme is
1013implemented in L<URI::_generic>, HTTP is implemented in L<URI::http>. If 1282implemented in L<URI::_generic>, HTTP is implemented in L<URI::http>. If
1014you need to use any of these schemes, you should include these manually, 1283you need to use any of these schemes, you should include these manually,
1015or use C<--usepacklist>. 1284or use C<--usepacklists>.
1016 1285
1017=back 1286=back
1018 1287
1019=head2 RECIPES 1288=head2 RECIPES
1020 1289
1021=over 4 1290=over 4
1022 1291
1023=item Linking everything in 1292=item Just link everything in
1024 1293
1025To link just about everything installed in the perl library into a new 1294To link just about everything installed in the perl library into a new
1026perl, try this: 1295perl, try this (the first time this runs it will take a long time, as a
1296lot of files need to be parsed):
1027 1297
1028 staticperl mkperl --strip ppi --incglob '*' 1298 staticperl mkperl -v --strip ppi --incglob '*'
1029 1299
1300If you don't mind the extra megabytes, this can be a very effective way of
1301creating bundles without having to worry about forgetting any modules.
1302
1303You get even more useful variants of this method by first selecting
1304everything, and then excluding stuff you are reasonable sure not to need -
1305L<bigperl|http://staticperl.schmorp.de/bigperl.html> uses this approach.
1306
1030=item Getting rid of netdb function 1307=item Getting rid of netdb functions
1031 1308
1032The perl core has lots of netdb functions (C<getnetbyname>, C<getgrent> 1309The perl core has lots of netdb functions (C<getnetbyname>, C<getgrent>
1033and so on) that few applications use. You can avoid compiling them in by 1310and so on) that few applications use. You can avoid compiling them in by
1034putting the following fragment into a C<preconfigure> hook: 1311putting the following fragment into a C<preconfigure> hook:
1035 1312
1052 do 1329 do
1053 PERL_CONFIGURE="$PERL_CONFIGURE -U$sym" 1330 PERL_CONFIGURE="$PERL_CONFIGURE -U$sym"
1054 done 1331 done
1055 } 1332 }
1056 1333
1057This mostly gains space when linking staticaly, as the functions will 1334This mostly gains space when linking statically, as the functions will
1058likely not be linked in. The gain for dynamically-linked binaries is 1335likely not be linked in. The gain for dynamically-linked binaries is
1059smaller. 1336smaller.
1060 1337
1061Also, this leaves C<gethostbyname> in - not only is it actually used 1338Also, this leaves C<gethostbyname> in - not only is it actually used
1062often, the L<Socket> module also exposes it, so leaving it out usually 1339often, the L<Socket> module also exposes it, so leaving it out usually

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