1 |
=head1 NAME |
2 |
|
3 |
staticperl - perl, libc, 100 modules, all in one 500kb file |
4 |
|
5 |
=head1 SYNOPSIS |
6 |
|
7 |
staticperl help # print the embedded documentation |
8 |
staticperl fetch # fetch and unpack perl sources |
9 |
staticperl configure # fetch and then configure perl |
10 |
staticperl build # configure and then build perl |
11 |
staticperl install # build and then install perl |
12 |
staticperl clean # clean most intermediate files (restart at configure) |
13 |
staticperl distclean # delete everything installed by this script |
14 |
staticperl cpan # invoke CPAN shell |
15 |
staticperl instmod path... # install unpacked modules |
16 |
staticperl instcpan modulename... # install modules from CPAN |
17 |
staticperl mkbundle <bundle-args...> # see documentation |
18 |
staticperl mkperl <bundle-args...> # see documentation |
19 |
|
20 |
Typical Examples: |
21 |
|
22 |
staticperl install # fetch, configure, build and install perl |
23 |
staticperl cpan # run interactive cpan shell |
24 |
staticperl mkperl -M '"Config_heavy.pl"' # build a perl that supports -V |
25 |
staticperl mkperl -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI -MURI::http |
26 |
# build a perl with the above modules linked in |
27 |
|
28 |
=head1 DESCRIPTION |
29 |
|
30 |
This script helps you creating single-file perl interpreters, or embedding |
31 |
a perl interpreter in your applications. Single-file means that it is |
32 |
fully self-contained - no separate shared objects, no autoload fragments, |
33 |
no .pm or .pl files are needed. And when linking statically, you can |
34 |
create (or embed) a single file that contains perl interpreter, libc, all |
35 |
the modules you need and all the libraries you need. |
36 |
|
37 |
With F<uClibc> and F<upx> on x86, you can create a single 500kb binary |
38 |
that contains perl and 100 modules such as POSIX, AnyEvent, EV, IO::AIO, |
39 |
Coro and so on. Or any other choice of modules. |
40 |
|
41 |
The created files do not need write access to the file system (like PAR |
42 |
does). In fact, since this script is in many ways similar to PAR::Packer, |
43 |
here are the differences: |
44 |
|
45 |
=over 4 |
46 |
|
47 |
=item * The generated executables are much smaller than PAR created ones. |
48 |
|
49 |
Shared objects and the perl binary contain a lot of extra info, while |
50 |
the static nature of F<staticperl> allows the linker to remove all |
51 |
functionality and meta-info not required by the final executable. Even |
52 |
extensions statically compiled into perl at build time will only be |
53 |
present in the final executable when needed. |
54 |
|
55 |
In addition, F<staticperl> can strip perl sources much more effectively |
56 |
than PAR. |
57 |
|
58 |
=item * The generated executables start much faster. |
59 |
|
60 |
There is no need to unpack files, or even to parse Zip archives (which is |
61 |
slow and memory-consuming business). |
62 |
|
63 |
=item * The generated executables don't need a writable filesystem. |
64 |
|
65 |
F<staticperl> loads all required files directly from memory. There is no |
66 |
need to unpack files into a temporary directory. |
67 |
|
68 |
=item * More control over included files. |
69 |
|
70 |
PAR tries to be maintenance and hassle-free - it tries to include more |
71 |
files than necessary to make sure everything works out of the box. The |
72 |
extra files (such as the unicode database) can take substantial amounts of |
73 |
memory and file size. |
74 |
|
75 |
With F<staticperl>, the burden is mostly with the developer - only direct |
76 |
compile-time dependencies and L<AutoLoader> are handled automatically. |
77 |
This means the modules to include often need to be tweaked manually. |
78 |
|
79 |
=item * PAR works out of the box, F<staticperl> does not. |
80 |
|
81 |
Maintaining your own custom perl build can be a pain in the ass, and while |
82 |
F<staticperl> tries to make this easy, it still requires a custom perl |
83 |
build and possibly fiddling with some modules. PAR is likely to produce |
84 |
results faster. |
85 |
|
86 |
=back |
87 |
|
88 |
=head1 HOW DOES IT WORK? |
89 |
|
90 |
Simple: F<staticperl> downloads, compile and installs a perl version of |
91 |
your choice in F<~/.staticperl>. You can add extra modules either by |
92 |
letting F<staticperl> install them for you automatically, or by using CPAN |
93 |
and doing it interactively. This usually takes 5-10 minutes, depending on |
94 |
the speed of your computer and your internet connection. |
95 |
|
96 |
It is possible to do program development at this stage, too. |
97 |
|
98 |
Afterwards, you create a list of files and modules you want to include, |
99 |
and then either build a new perl binary (that acts just like a normal perl |
100 |
except everything is compiled in), or you create bundle files (basically C |
101 |
sources you can use to embed all files into your project). |
102 |
|
103 |
This step is very fast (a few seconds if PPI is not used for stripping, |
104 |
more seconds otherwise, as PPI is very slow), and can be tweaked and |
105 |
repeated as often as necessary. |
106 |
|
107 |
=head1 THE F<STATICPERL> SCRIPT |
108 |
|
109 |
This module installs a script called F<staticperl> into your perl |
110 |
binary directory. The script is fully self-contained, and can be used |
111 |
without perl (for example, in an uClibc chroot environment). In fact, |
112 |
it can be extracted from the C<App::Staticperl> distribution tarball as |
113 |
F<bin/staticperl>, without any installation. |
114 |
|
115 |
F<staticperl> interprets the first argument as a command to execute, |
116 |
optionally followed by any parameters. |
117 |
|
118 |
There are two command categories: the "phase 1" commands which deal with |
119 |
installing perl and perl modules, and the "phase 2" commands, which deal |
120 |
with creating binaries and bundle files. |
121 |
|
122 |
=head2 PHASE 1 COMMANDS: INSTALLING PERL |
123 |
|
124 |
The most important command is F<install>, which does basically |
125 |
everything. The default is to download and install perl 5.12.2 and a few |
126 |
modules required by F<staticperl> itself, but all this can (and should) be |
127 |
changed - see L<CONFIGURATION>, below. |
128 |
|
129 |
The command |
130 |
|
131 |
staticperl install |
132 |
|
133 |
Is normally all you need: It installs the perl interpreter in |
134 |
F<~/.staticperl/perl>. It downloads, configures, builds and installs the |
135 |
perl interpreter if required. |
136 |
|
137 |
Most of the following commands simply run one or more steps of this |
138 |
sequence. |
139 |
|
140 |
To force recompilation or reinstallation, you need to run F<staticperl |
141 |
distclean> first. |
142 |
|
143 |
=over 4 |
144 |
|
145 |
=item F<staticperl fetch> |
146 |
|
147 |
Runs only the download and unpack phase, unless this has already happened. |
148 |
|
149 |
=item F<staticperl configure> |
150 |
|
151 |
Configures the unpacked perl sources, potentially after downloading them first. |
152 |
|
153 |
=item F<staticperl build> |
154 |
|
155 |
Builds the configured perl sources, potentially after automatically |
156 |
configuring them. |
157 |
|
158 |
=item F<staticperl install> |
159 |
|
160 |
Wipes the perl installation directory (usually F<~/.staticperl/perl>) and |
161 |
installs the perl distribution, potentially after building it first. |
162 |
|
163 |
=item F<staticperl cpan> [args...] |
164 |
|
165 |
Starts an interactive CPAN shell that you can use to install further |
166 |
modules. Installs the perl first if necessary, but apart from that, |
167 |
no magic is involved: you could just as well run it manually via |
168 |
F<~/.staticperl/perl/bin/cpan>. |
169 |
|
170 |
Any additional arguments are simply passed to the F<cpan> command. |
171 |
|
172 |
=item F<staticperl instcpan> module... |
173 |
|
174 |
Tries to install all the modules given and their dependencies, using CPAN. |
175 |
|
176 |
Example: |
177 |
|
178 |
staticperl instcpan EV AnyEvent::HTTPD Coro |
179 |
|
180 |
=item F<staticperl instsrc> directory... |
181 |
|
182 |
In the unlikely case that you have unpacked perl modules around and want |
183 |
to install from these instead of from CPAN, you can do this using this |
184 |
command by specifying all the directories with modules in them that you |
185 |
want to have built. |
186 |
|
187 |
=item F<staticperl clean> |
188 |
|
189 |
Runs F<make distclean> in the perl source directory (and potentially |
190 |
cleans up other intermediate files). This can be used to clean up |
191 |
intermediate files without removing the installed perl interpreter. |
192 |
|
193 |
=item F<staticperl distclean> |
194 |
|
195 |
This wipes your complete F<~/.staticperl> directory. Be careful with this, |
196 |
it nukes your perl download, perl sources, perl distribution and any |
197 |
installed modules. It is useful if you wish to start over "from scratch" |
198 |
or when you want to uninstall F<staticperl>. |
199 |
|
200 |
=back |
201 |
|
202 |
=head2 PHASE 2 COMMANDS: BUILDING PERL BUNDLES |
203 |
|
204 |
Building (linking) a new F<perl> binary is handled by a separate |
205 |
script. To make it easy to use F<staticperl> from a F<chroot>, the script |
206 |
is embedded into F<staticperl>, which will write it out and call for you |
207 |
with any arguments you pass: |
208 |
|
209 |
staticperl mkbundle mkbundle-args... |
210 |
|
211 |
In the oh so unlikely case of something not working here, you |
212 |
can run the script manually as well (by default it is written to |
213 |
F<~/.staticperl/mkbundle>). |
214 |
|
215 |
F<mkbundle> is a more conventional command and expect the argument |
216 |
syntax commonly used on UNIX clones. For example, this command builds |
217 |
a new F<perl> binary and includes F<Config.pm> (for F<perl -V>), |
218 |
F<AnyEvent::HTTPD>, F<URI> and a custom F<httpd> script (from F<eg/httpd> |
219 |
in this distribution): |
220 |
|
221 |
# first make sure we have perl and the required modules |
222 |
staticperl instcpan AnyEvent::HTTPD |
223 |
|
224 |
# now build the perl |
225 |
staticperl mkperl -M'"Config_heavy.pl"' -MAnyEvent::Impl::Perl \ |
226 |
-MAnyEvent::HTTPD -MURI::http \ |
227 |
--add 'eg/httpd httpd.pm' |
228 |
|
229 |
# finally, invoke it |
230 |
./perl -Mhttpd |
231 |
|
232 |
As you can see, things are not quite as trivial: the L<Config> module has |
233 |
a hidden dependency which is not even a perl module (F<Config_heavy.pl>), |
234 |
L<AnyEvent> needs at least one event loop backend that we have to |
235 |
specify manually (here L<AnyEvent::Impl::Perl>), and the F<URI> module |
236 |
(required by L<AnyEvent::HTTPD>) implements various URI schemes as extra |
237 |
modules - since L<AnyEvent::HTTPD> only needs C<http> URIs, we only need |
238 |
to include that module. I found out about these dependencies by carefully |
239 |
watching any error messages about missing modules... |
240 |
|
241 |
=head3 OPTION PROCESSING |
242 |
|
243 |
All options can be given as arguments on the command line (typically |
244 |
using long (e.g. C<--verbose>) or short option (e.g. C<-v>) style). Since |
245 |
specifying a lot of modules can make the command line very cumbersome, |
246 |
you can put all long options into a "bundle specification file" (with or |
247 |
without C<--> prefix) and specify this bundle file instead. |
248 |
|
249 |
For example, the command given earlier could also look like this: |
250 |
|
251 |
staticperl mkperl httpd.bundle |
252 |
|
253 |
And all options could be in F<httpd.bundle>: |
254 |
|
255 |
use "Config_heavy.pl" |
256 |
use AnyEvent::Impl::Perl |
257 |
use AnyEvent::HTTPD |
258 |
use URI::http |
259 |
add eg/httpd httpd.pm |
260 |
|
261 |
All options that specify modules or files to be added are processed in the |
262 |
order given on the command line (that affects the C<--use> and C<--eval> |
263 |
options at the moment). |
264 |
|
265 |
=head3 MKBUNDLE OPTIONS |
266 |
|
267 |
=over 4 |
268 |
|
269 |
=item --verbose | -v |
270 |
|
271 |
Increases the verbosity level by one (the default is C<1>). |
272 |
|
273 |
=item --quiet | -q |
274 |
|
275 |
Decreases the verbosity level by one. |
276 |
|
277 |
=item --strip none|pod|ppi |
278 |
|
279 |
Specify the stripping method applied to reduce the file of the perl |
280 |
sources included. |
281 |
|
282 |
The default is C<pod>, which uses the L<Pod::Strip> module to remove all |
283 |
pod documentation, which is very fast and reduces file size a lot. |
284 |
|
285 |
The C<ppi> method uses L<PPI> to parse and condense the perl sources. This |
286 |
saves a lot more than just L<Pod::Strip>, and is generally safer, but |
287 |
is also a lot slower, so is best used for production builds. Note that |
288 |
this method doesn't optimise for raw file size, but for best compression |
289 |
(that means that the uncompressed file size is a bit larger, but the files |
290 |
compress better, e.g. with F<upx>). |
291 |
|
292 |
Last not least, if you need accurate line numbers in error messages, |
293 |
or in the unlikely case where C<pod> is too slow, or some module gets |
294 |
mistreated, you can specify C<none> to not mangle included perl sources in |
295 |
any way. |
296 |
|
297 |
=item --perl |
298 |
|
299 |
After writing out the bundle files, try to link a new perl interpreter. It |
300 |
will be called F<perl> and will be left in the current working |
301 |
directory. The bundle files will be removed. |
302 |
|
303 |
This switch is automatically used when F<staticperl> is invoked with the |
304 |
C<mkperl> command (instead of C<mkbundle>): |
305 |
|
306 |
# build a new ./perl with only common::sense in it - very small :) |
307 |
staticperl mkperl -Mcommon::sense |
308 |
|
309 |
=item --use module | -Mmodule |
310 |
|
311 |
Include the named module and all direct dependencies. This is done by |
312 |
C<require>'ing the module in a subprocess and tracing which other modules |
313 |
and files it actually loads. If the module uses L<AutoLoader>, then all |
314 |
splitfiles will be included as well. |
315 |
|
316 |
Example: include AnyEvent and AnyEvent::Impl::Perl. |
317 |
|
318 |
staticperl mkbundle --use AnyEvent --use AnyEvent::Impl::Perl |
319 |
|
320 |
Sometimes you want to load old-style "perl libraries" (F<.pl> files), or |
321 |
maybe other weirdly named files. To do that, you need to quote the name in |
322 |
single or double quotes. When given on the command line, you probably need |
323 |
to quote once more to avoid your shell interpreting it. Common cases that |
324 |
need this are F<Config_heavy.pl> and F<utf8_heavy.pl>. |
325 |
|
326 |
Example: include the required files for F<perl -V> to work in all its |
327 |
glory (F<Config.pm> is included automatically by this). |
328 |
|
329 |
# bourne shell |
330 |
staticperl mkbundle --use '"Config_heavy.pl"' |
331 |
|
332 |
# bundle specification file |
333 |
use "Config_heavy.pl" |
334 |
|
335 |
The C<-Mmodule> syntax is included as an alias that might be easier to |
336 |
remember than C<use>. Or maybe it confuses people. Time will tell. Or |
337 |
maybe not. Argh. |
338 |
|
339 |
=item --eval "perl code" | -e "perl code" |
340 |
|
341 |
Sometimes it is easier (or necessary) to specify dependencies using perl |
342 |
code, or maybe one of the modules you use need a special use statement. In |
343 |
that case, you can use C<eval> to execute some perl snippet or set some |
344 |
variables or whatever you need. All files C<require>'d or C<use>'d in the |
345 |
script are included in the final bundle. |
346 |
|
347 |
Keep in mind that F<mkbundle> will only C<require> the modules named |
348 |
by the C<--use> option, so do not expect the symbols from modules you |
349 |
C<--use>'d earlier on the command line to be available. |
350 |
|
351 |
Example: force L<AnyEvent> to detect a backend and therefore include it |
352 |
in the final bundle. |
353 |
|
354 |
staticperl mkbundle --eval 'use AnyEvent; AnyEvent::detect' |
355 |
|
356 |
# or like this |
357 |
staticperl mkbundle -MAnyEvent --eval 'use AnyEvent; AnyEvent::detect' |
358 |
|
359 |
Example: use a separate "bootstrap" script that C<use>'s lots of modules |
360 |
and include this in the final bundle, to be executed automatically. |
361 |
|
362 |
staticperl mkbundle --eval 'do "bootstrap"' --boot bootstrap |
363 |
|
364 |
=item --boot filename |
365 |
|
366 |
Include the given file in the bundle and arrange for it to be executed |
367 |
(using a C<require>) before anything else when the new perl is |
368 |
initialised. This can be used to modify C<@INC> or anything else before |
369 |
the perl interpreter executes scripts given on the command line (or via |
370 |
C<-e>). This works even in an embedded interpreter. |
371 |
|
372 |
=item --add "file" | --add "file alias" |
373 |
|
374 |
Adds the given (perl) file into the bundle (and optionally call it |
375 |
"alias"). This is useful to include any custom files into the bundle. |
376 |
|
377 |
Example: embed the file F<httpd> as F<httpd.pm> when creating the bundle. |
378 |
|
379 |
staticperl mkperl --add "httpd httpd.pm" |
380 |
|
381 |
It is also a great way to add any custom modules: |
382 |
|
383 |
# specification file |
384 |
add file1 myfiles/file1 |
385 |
add file2 myfiles/file2 |
386 |
add file3 myfiles/file3 |
387 |
|
388 |
=item --binadd "file" | --add "file alias" |
389 |
|
390 |
Just like C<--add>, except that it treats the file as binary and adds it |
391 |
without any processing. |
392 |
|
393 |
You should probably add a C</> prefix to avoid clashing with embedded |
394 |
perl files (whose paths do not start with C</>), and/or use a special |
395 |
directory, such as C</res/name>. |
396 |
|
397 |
You can later get a copy of these files by calling C<staticperl::find |
398 |
"alias">. |
399 |
|
400 |
=item --static |
401 |
|
402 |
When C<--perl> is also given, link statically instead of dynamically. The |
403 |
default is to link the new perl interpreter fully dynamic (that means all |
404 |
perl modules are linked statically, but all external libraries are still |
405 |
referenced dynamically). |
406 |
|
407 |
Keep in mind that Solaris doesn't support static linking at all, and |
408 |
systems based on GNU libc don't really support it in a usable fashion |
409 |
either. Try uClibc if you want to create fully statically linked |
410 |
executables, or try the C<--staticlibs> option to link only some libraries |
411 |
statically. |
412 |
|
413 |
=item any other argument |
414 |
|
415 |
Any other argument is interpreted as a bundle specification file, which |
416 |
supports most long options (without extra quoting), one option per line. |
417 |
|
418 |
=back |
419 |
|
420 |
=head2 F<STATCPERL> CONFIGURATION AND HOOKS |
421 |
|
422 |
During (each) startup, F<staticperl> tries to source the following shell |
423 |
files in order: |
424 |
|
425 |
/etc/staticperlrc |
426 |
~/.staticperlrc |
427 |
$STATICPERL/rc |
428 |
|
429 |
They can be used to override shell variables, or define functions to be |
430 |
called at specific phases. |
431 |
|
432 |
Note that the last file is erased during F<staticperl distclean>, so |
433 |
generally should not be used. |
434 |
|
435 |
=head3 CONFIGURATION VARIABLES |
436 |
|
437 |
=head4 Variables you I<should> override |
438 |
|
439 |
=over 4 |
440 |
|
441 |
=item C<EMAIL> |
442 |
|
443 |
The e-mail address of the person who built this binary. Has no good |
444 |
default, so should be specified by you. |
445 |
|
446 |
=item C<CPAN> |
447 |
|
448 |
The URL of the CPAN mirror to use (e.g. L<http://mirror.netcologne.de/cpan/>). |
449 |
|
450 |
=item C<EXTRA_MODULES> |
451 |
|
452 |
Additional modules installed during F<staticperl install>. Here you can |
453 |
set which modules you want have to installed from CPAN. |
454 |
|
455 |
Example: I really really need EV, AnyEvent, Coro and AnyEvent::AIO. |
456 |
|
457 |
EXTRA_MODULES="EV AnyEvent Coro AnyEvent::AIO" |
458 |
|
459 |
Note that you can also use a C<postinstall> hook to achieve this, and |
460 |
more. |
461 |
|
462 |
=back |
463 |
|
464 |
=head4 Variables you might I<want> to override |
465 |
|
466 |
=over 4 |
467 |
|
468 |
=item C<STATICPERL> |
469 |
|
470 |
The directory where staticperl stores all its files |
471 |
(default: F<~/.staticperl>). |
472 |
|
473 |
=item C<PERL_MM_USE_DEFAULT>, C<EV_EXTRA_DEFS>, ... |
474 |
|
475 |
Usually set to C<1> to make modules "less inquisitive" during their |
476 |
installation, you can set any environment variable you want - some modules |
477 |
(such as L<Coro> or L<EV>) use environment variables for further tweaking. |
478 |
|
479 |
=item C<PERL_VERSION> |
480 |
|
481 |
The perl version to install - default is currently C<5.12.2>, but C<5.8.9> |
482 |
is also a good choice (5.8.9 is much smaller than 5.12.2, while 5.10.1 is |
483 |
about as big as 5.12.2). |
484 |
|
485 |
=item C<PERL_PREFIX> |
486 |
|
487 |
The prefix where perl gets installed (default: F<$STATICPERL/perl>), |
488 |
i.e. where the F<bin> and F<lib> subdirectories will end up. |
489 |
|
490 |
=item C<PERL_CONFIGURE> |
491 |
|
492 |
Additional Configure options - these are simply passed to the perl |
493 |
Configure script. For example, if you wanted to enable dynamic loading, |
494 |
you could pass C<-Dusedl>. To enable ithreads (Why would you want that |
495 |
insanity? Don't! Use L<forks> instead!) you would pass C<-Duseithreads> |
496 |
and so on. |
497 |
|
498 |
More commonly, you would either activate 64 bit integer support |
499 |
(C<-Duse64bitint>), or disable large files support (-Uuselargefiles), to |
500 |
reduce filesize further. |
501 |
|
502 |
=item C<PERL_CPPFLAGS>, C<PERL_OPTIMIZE>, C<PERL_LDFLAGS>, C<PERL_LIBS> |
503 |
|
504 |
These flags are passed to perl's F<Configure> script, and are generally |
505 |
optimised for small size (at the cost of performance). Since they also |
506 |
contain subtle workarounds around various build issues, changing these |
507 |
usually requires understanding their default values - best look at the top |
508 |
of the F<staticperl> script for more info on these. |
509 |
|
510 |
=back |
511 |
|
512 |
=head4 Variables you probably I<do not want> to override |
513 |
|
514 |
=over 4 |
515 |
|
516 |
=item C<MKBUNDLE> |
517 |
|
518 |
Where F<staticperl> writes the C<mkbundle> command to |
519 |
(default: F<$STATICPERL/mkbundle>). |
520 |
|
521 |
=item C<STATICPERL_MODULES> |
522 |
|
523 |
Additional modules needed by C<mkbundle> - should therefore not be changed |
524 |
unless you know what you are doing. |
525 |
|
526 |
=back |
527 |
|
528 |
=head3 OVERRIDABLE HOOKS |
529 |
|
530 |
In addition to environment variables, it is possible to provide some |
531 |
shell functions that are called at specific times. To provide your own |
532 |
commands, just define the corresponding function. |
533 |
|
534 |
Example: install extra modules from CPAN and from some directories |
535 |
at F<staticperl install> time. |
536 |
|
537 |
postinstall() { |
538 |
rm -rf lib/threads* # weg mit Schaden |
539 |
instcpan IO::AIO EV |
540 |
instsrc ~/src/AnyEvent |
541 |
instsrc ~/src/XML-Sablotron-1.0100001 |
542 |
instcpan Anyevent::AIO AnyEvent::HTTPD |
543 |
} |
544 |
|
545 |
=over 4 |
546 |
|
547 |
=item postconfigure |
548 |
|
549 |
Called after configuring, but before building perl. Current working |
550 |
directory is the perl source directory. |
551 |
|
552 |
Could be used to tailor/patch config.sh (followed by F<./Configure -S>) or |
553 |
do any other modifications. |
554 |
|
555 |
=item postbuild |
556 |
|
557 |
Called after building, but before installing perl. Current working |
558 |
directory is the perl source directory. |
559 |
|
560 |
I have no clue what this could be used for - tell me. |
561 |
|
562 |
=item postinstall |
563 |
|
564 |
Called after perl and any extra modules have been installed in C<$PREFIX>, |
565 |
but before setting the "installation O.K." flag. |
566 |
|
567 |
The current working directory is C<$PREFIX>, but maybe you should not rely |
568 |
on that. |
569 |
|
570 |
This hook is most useful to customise the installation, by deleting files, |
571 |
or installing extra modules using the C<instcpan> or C<instsrc> functions. |
572 |
|
573 |
The script must return with a zero exit status, or the installation will |
574 |
fail. |
575 |
|
576 |
=back |
577 |
|
578 |
=head1 ANATOMY OF A BUNDLE |
579 |
|
580 |
When not building a new perl binary, C<mkbundle> will leave a number of |
581 |
files in the current working directory, which can be used to embed a perl |
582 |
interpreter in your program. |
583 |
|
584 |
Intimate knowledge of L<perlembed> and preferably some experience with |
585 |
embedding perl is highly recommended. |
586 |
|
587 |
C<mkperl> (or the C<--perl> option) basically does this to link the new |
588 |
interpreter (it also adds a main program to F<bundle.>): |
589 |
|
590 |
$Config{cc} $(cat bundle.ccopts) -o perl bundle.c $(cat bundle.ldopts) |
591 |
|
592 |
=over 4 |
593 |
|
594 |
=item bundle.h |
595 |
|
596 |
A header file that contains the prototypes of the few symbols "exported" |
597 |
by bundle.c, and also exposes the perl headers to the application. |
598 |
|
599 |
=over 4 |
600 |
|
601 |
=item staticperl_init () |
602 |
|
603 |
Initialises the perl interpreter. You can use the normal perl functions |
604 |
after calling this function, for example, to define extra functions or |
605 |
to load a .pm file that contains some initialisation code, or the main |
606 |
program function: |
607 |
|
608 |
XS (xsfunction) |
609 |
{ |
610 |
dXSARGS; |
611 |
|
612 |
// now we have items, ST(i) etc. |
613 |
} |
614 |
|
615 |
static void |
616 |
run_myapp(void) |
617 |
{ |
618 |
staticperl_init (); |
619 |
newXSproto ("myapp::xsfunction", xsfunction, __FILE__, "$$;$"); |
620 |
eval_pv ("require myapp::main", 1); // executes "myapp/main.pm" |
621 |
} |
622 |
|
623 |
=item staticperl_xs_init (pTHX) |
624 |
|
625 |
Sometimes you need direct control over C<perl_parse> and C<perl_run>, in |
626 |
which case you do not want to use C<staticperl_init> but call them on your |
627 |
own. |
628 |
|
629 |
Then you need this function - either pass it directly as the C<xs_init> |
630 |
function to C<perl_parse>, or call it from your own C<xs_init> function. |
631 |
|
632 |
=item staticperl_cleanup () |
633 |
|
634 |
In the unlikely case that you want to destroy the perl interpreter, here |
635 |
is the corresponding function. |
636 |
|
637 |
=item PerlInterpreter *staticperl |
638 |
|
639 |
The perl interpreter pointer used by staticperl. Not normally so useful, |
640 |
but there it is. |
641 |
|
642 |
=back |
643 |
|
644 |
=item bundle.ccopts |
645 |
|
646 |
Contains the compiler options required to compile at least F<bundle.c> and |
647 |
any file that includes F<bundle.h> - you should probably use it in your |
648 |
C<CFLAGS>. |
649 |
|
650 |
=item bundle.ldopts |
651 |
|
652 |
The linker options needed to link the final program. |
653 |
|
654 |
=back |
655 |
|
656 |
=head1 RUNTIME FUNCTIONALITY |
657 |
|
658 |
Binaries created with C<mkbundle>/C<mkperl> contain extra functions, which |
659 |
are required to access the bundled perl sources, but might be useful for |
660 |
other purposes. |
661 |
|
662 |
In addition, for the embedded loading of perl files to work, F<staticperl> |
663 |
overrides the C<@INC> array. |
664 |
|
665 |
=over 4 |
666 |
|
667 |
=item $file = staticperl::find $path |
668 |
|
669 |
Returns the data associated with the given C<$path> |
670 |
(e.g. C<Digest/MD5.pm>, C<auto/POSIX/autosplit.ix>), which is basically |
671 |
the UNIX path relative to the perl library directory. |
672 |
|
673 |
Returns C<undef> if the file isn't embedded. |
674 |
|
675 |
=item @paths = staticperl::list |
676 |
|
677 |
Returns the list of all paths embedded in this binary. |
678 |
|
679 |
=back |
680 |
|
681 |
=head1 FULLY STATIC BINARIES - BUILDROOT |
682 |
|
683 |
To make truly static (Linux-) libraries, you might want to have a look at |
684 |
buildroot (L<http://buildroot.uclibc.org/>). |
685 |
|
686 |
Buildroot is primarily meant to set up a cross-compile environment (which |
687 |
is not so useful as perl doesn't quite like cross compiles), but it can also compile |
688 |
a chroot environment where you can use F<staticperl>. |
689 |
|
690 |
To do so, download buildroot, and enable "Build options => development |
691 |
files in target filesystem" and optionally "Build options => gcc |
692 |
optimization level (optimize for size)". At the time of writing, I had |
693 |
good experiences with GCC 4.4.x but not GCC 4.5. |
694 |
|
695 |
To minimise code size, I used C<-pipe -ffunction-sections -fdata-sections |
696 |
-finline-limit=8 -fno-builtin-strlen -mtune=i386>. The C<-mtune=i386> |
697 |
doesn't decrease codesize much, but it makes the file much more |
698 |
compressible. |
699 |
|
700 |
If you don't need Coro or threads, you can go with "linuxthreads.old" (or |
701 |
no thread support). For Coro, it is highly recommended to switch to a |
702 |
uClibc newer than 0.9.31 (at the time of this writing, I used the 20101201 |
703 |
snapshot) and enable NPTL, otherwise Coro needs to be configured with the |
704 |
ultra-slow pthreads backend to work around linuxthreads bugs (it also uses |
705 |
twice the address space needed for stacks). |
706 |
|
707 |
If you use C<linuxthreads.old>, then you should also be aware that |
708 |
uClibc shares C<errno> between all threads when statically linking. See |
709 |
L<http://lists.uclibc.org/pipermail/uclibc/2010-June/044157.html> for a |
710 |
workaround (And L<https://bugs.uclibc.org/2089> for discussion). |
711 |
|
712 |
C<ccache> support is also recommended, especially if you want |
713 |
to play around with buildroot options. Enabling the C<miniperl> |
714 |
package will probably enable all options required for a successful |
715 |
perl build. F<staticperl> itself additionally needs either C<wget> |
716 |
(recommended, for CPAN) or C<curl>. |
717 |
|
718 |
As for shells, busybox should provide all that is needed, but the default |
719 |
busybox configuration doesn't include F<comm> which is needed by perl - |
720 |
either make a custom busybox config, or compile coreutils. |
721 |
|
722 |
For the latter route, you might find that bash has some bugs that keep |
723 |
it from working properly in a chroot - either use dash (and link it to |
724 |
F</bin/sh> inside the chroot) or link busybox to F</bin/sh>, using it's |
725 |
built-in ash shell. |
726 |
|
727 |
Finally, you need F</dev/null> inside the chroot for many scripts to work |
728 |
- F<cp /dev/null output/target/dev> or bind-mounting your F</dev> will |
729 |
both provide this. |
730 |
|
731 |
After you have compiled and set up your buildroot target, you can copy |
732 |
F<staticperl> from the C<App::Staticperl> distribution or from your |
733 |
perl f<bin> directory (if you installed it) into the F<output/target> |
734 |
filesystem, chroot inside and run it. |
735 |
|
736 |
=head1 AUTHOR |
737 |
|
738 |
Marc Lehmann <schmorp@schmorp.de> |
739 |
http://software.schmorp.de/pkg/staticperl.html |