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=head1 NAME |
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staticperl - perl, libc, 100 modules, all in one 500kb file |
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=head1 SYNOPSIS |
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staticperl help # print the embedded documentation |
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staticperl fetch # fetch and unpack perl sources |
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staticperl configure # fetch and then configure perl |
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staticperl build # configure and then build perl |
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staticperl install # build and then install perl |
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staticperl clean # clean most intermediate files (restart at configure) |
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staticperl distclean # delete everything installed by this script |
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staticperl cpan # invoke CPAN shell |
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staticperl instmod path... # install unpacked modules |
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staticperl instcpan modulename... # install modules from CPAN |
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staticperl mkbundle <bundle-args...> # see documentation |
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staticperl mkperl <bundle-args...> # see documentation |
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Typical Examples: |
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staticperl install # fetch, configure, build and install perl |
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staticperl cpan # run interactive cpan shell |
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staticperl mkperl -M '"Config_heavy.pl"' # build a perl that supports -V |
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staticperl mkperl -MAnyEvent::Impl::Perl -MAnyEvent::HTTPD -MURI -MURI::http |
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# build a perl with the above modules linked in |
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=head1 DESCRIPTION |
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This script helps you creating single-file perl interpreters, or embedding |
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a perl interpreter in your applications. Single-file means that it is |
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fully self-contained - no separate shared objects, no autoload fragments, |
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no .pm or .pl files are needed. And when linking statically, you can |
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create (or embed) a single file that contains perl interpreter, libc, all |
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the modules you need and all the libraries you need. |
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With F<uClibc> and F<upx> on x86, you can create a single 500kb binary |
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that contains perl and 100 modules such as POSIX, AnyEvent, EV, IO::AIO, |
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Coro and so on. Or any other choice of modules. |
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The created files do not need write access to the file system (like PAR |
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does). In fact, since this script is in many ways similar to PAR::Packer, |
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here are the differences: |
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=over 4 |
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=item * The generated executables are much smaller than PAR created ones. |
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Shared objects and the perl binary contain a lot of extra info, while |
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the static nature of F<staticperl> allows the linker to remove all |
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functionality and meta-info not required by the final executable. Even |
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extensions statically compiled into perl at build time will only be |
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present in the final executable when needed. |
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In addition, F<staticperl> can strip perl sources much more effectively |
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than PAR. |
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=item * The generated executables start much faster. |
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There is no need to unpack files, or even to parse Zip archives (which is |
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slow and memory-consuming business). |
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=item * The generated executables don't need a writable filesystem. |
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F<staticperl> loads all required files directly from memory. There is no |
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need to unpack files into a temporary directory. |
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=item * More control over included files. |
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PAR tries to be maintenance and hassle-free - it tries to include more |
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files than necessary to make sure everything works out of the box. The |
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extra files (such as the unicode database) can take substantial amounts of |
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memory and file size. |
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With F<staticperl>, the burden is mostly with the developer - only direct |
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compile-time dependencies and L<AutoLoader> are handled automatically. |
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This means the modules to include often need to be tweaked manually. |
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=item * PAR works out of the box, F<staticperl> does not. |
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Maintaining your own custom perl build can be a pain in the ass, and while |
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F<staticperl> tries to make this easy, it still requires a custom perl |
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build and possibly fiddling with some modules. PAR is likely to produce |
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results faster. |
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=back |
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=head1 HOW DOES IT WORK? |
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Simple: F<staticperl> downloads, compile and installs a perl version of |
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your choice in F<~/.staticperl>. You can add extra modules either by |
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letting F<staticperl> install them for you automatically, or by using CPAN |
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and doing it interactively. This usually takes 5-10 minutes, depending on |
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the speed of your computer and your internet connection. |
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It is possible to do program development at this stage, too. |
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Afterwards, you create a list of files and modules you want to include, |
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and then either build a new perl binary (that acts just like a normal perl |
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except everything is compiled in), or you create bundle files (basically C |
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sources you can use to embed all files into your project). |
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This step is very fast (a few seconds if PPI is not used for stripping, |
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more seconds otherwise, as PPI is very slow), and can be tweaked and |
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repeated as often as necessary. |
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=head1 THE F<STATICPERL> SCRIPT |
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This module installs a script called F<staticperl> into your perl |
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binary directory. The script is fully self-contained, and can be used |
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without perl (for example, in an uClibc chroot environment). In fact, |
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it can be extracted from the C<App::Staticperl> distribution tarball as |
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F<bin/staticperl>, without any installation. |
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F<staticperl> interprets the first argument as a command to execute, |
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optionally followed by any parameters. |
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There are two command categories: the "phase 1" commands which deal with |
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installing perl and perl modules, and the "phase 2" commands, which deal |
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with creating binaries and bundle files. |
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=head2 PHASE 1 COMMANDS: INSTALLING PERL |
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The most important command is F<install>, which does basically |
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everything. The default is to download and install perl 5.12.2 and a few |
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modules required by F<staticperl> itself, but all this can (and should) be |
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changed - see L<CONFIGURATION>, below. |
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The command |
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staticperl install |
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Is normally all you need: It installs the perl interpreter in |
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F<~/.staticperl/perl>. It downloads, configures, builds and installs the |
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perl interpreter if required. |
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Most of the following commands simply run one or more steps of this |
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sequence. |
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To force recompilation or reinstallation, you need to run F<staticperl |
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distclean> first. |
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=over 4 |
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=item F<staticperl fetch> |
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Runs only the download and unpack phase, unless this has already happened. |
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=item F<staticperl configure> |
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Configures the unpacked perl sources, potentially after downloading them first. |
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=item F<staticperl build> |
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Builds the configured perl sources, potentially after automatically |
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configuring them. |
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=item F<staticperl install> |
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Wipes the perl installation directory (usually F<~/.staticperl/perl>) and |
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installs the perl distribution, potentially after building it first. |
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=item F<staticperl cpan> [args...] |
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Starts an interactive CPAN shell that you can use to install further |
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modules. Installs the perl first if necessary, but apart from that, |
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no magic is involved: you could just as well run it manually via |
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F<~/.staticperl/perl/bin/cpan>. |
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Any additional arguments are simply passed to the F<cpan> command. |
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=item F<staticperl instcpan> module... |
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Tries to install all the modules given and their dependencies, using CPAN. |
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Example: |
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staticperl instcpan EV AnyEvent::HTTPD Coro |
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=item F<staticperl instsrc> directory... |
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In the unlikely case that you have unpacked perl modules around and want |
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to install from these instead of from CPAN, you can do this using this |
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command by specifying all the directories with modules in them that you |
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want to have built. |
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=item F<staticperl clean> |
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Runs F<make distclean> in the perl source directory (and potentially |
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cleans up other intermediate files). This can be used to clean up |
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intermediate files without removing the installed perl interpreter. |
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=item F<staticperl distclean> |
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This wipes your complete F<~/.staticperl> directory. Be careful with this, |
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it nukes your perl download, perl sources, perl distribution and any |
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installed modules. It is useful if you wish to start over "from scratch" |
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or when you want to uninstall F<staticperl>. |
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=back |
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=head2 PHASE 2 COMMANDS: BUILDING PERL BUNDLES |
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Building (linking) a new F<perl> binary is handled by a separate |
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script. To make it easy to use F<staticperl> from a F<chroot>, the script |
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is embedded into F<staticperl>, which will write it out and call for you |
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with any arguments you pass: |
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staticperl mkbundle mkbundle-args... |
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In the oh so unlikely case of something not working here, you |
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can run the script manually as well (by default it is written to |
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F<~/.staticperl/mkbundle>). |
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F<mkbundle> is a more conventional command and expect the argument |
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syntax commonly used on UNIX clones. For example, this command builds |
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a new F<perl> binary and includes F<Config.pm> (for F<perl -V>), |
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F<AnyEvent::HTTPD>, F<URI> and a custom F<httpd> script (from F<eg/httpd> |
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in this distribution): |
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# first make sure we have perl and the required modules |
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staticperl instcpan AnyEvent::HTTPD |
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# now build the perl |
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staticperl mkperl -M'"Config_heavy.pl"' -MAnyEvent::Impl::Perl \ |
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-MAnyEvent::HTTPD -MURI::http \ |
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--add 'eg/httpd httpd.pm' |
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# finally, invoke it |
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./perl -Mhttpd |
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As you can see, things are not quite as trivial: the L<Config> module has |
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a hidden dependency which is not even a perl module (F<Config_heavy.pl>), |
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L<AnyEvent> needs at least one event loop backend that we have to |
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specify manually (here L<AnyEvent::Impl::Perl>), and the F<URI> module |
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(required by L<AnyEvent::HTTPD>) implements various URI schemes as extra |
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modules - since L<AnyEvent::HTTPD> only needs C<http> URIs, we only need |
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to include that module. I found out about these dependencies by carefully |
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watching any error messages about missing modules... |
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=head3 OPTION PROCESSING |
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All options can be given as arguments on the command line (typically |
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using long (e.g. C<--verbose>) or short option (e.g. C<-v>) style). Since |
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specifying a lot of modules can make the command line very cumbersome, |
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you can put all long options into a "bundle specification file" (with or |
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without C<--> prefix) and specify this bundle file instead. |
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For example, the command given earlier could also look like this: |
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staticperl mkperl httpd.bundle |
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And all options could be in F<httpd.bundle>: |
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use "Config_heavy.pl" |
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use AnyEvent::Impl::Perl |
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use AnyEvent::HTTPD |
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use URI::http |
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add eg/httpd httpd.pm |
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All options that specify modules or files to be added are processed in the |
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order given on the command line (that affects the C<--use> and C<--eval> |
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options at the moment). |
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=head3 MKBUNDLE OPTIONS |
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=over 4 |
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=item --verbose | -v |
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Increases the verbosity level by one (the default is C<1>). |
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=item --quiet | -q |
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Decreases the verbosity level by one. |
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=item --strip none|pod|ppi |
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Specify the stripping method applied to reduce the file of the perl |
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sources included. |
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The default is C<pod>, which uses the L<Pod::Strip> module to remove all |
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pod documentation, which is very fast and reduces file size a lot. |
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The C<ppi> method uses L<PPI> to parse and condense the perl sources. This |
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saves a lot more than just L<Pod::Strip>, and is generally safer, but |
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is also a lot slower, so is best used for production builds. Note that |
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this method doesn't optimise for raw file size, but for best compression |
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(that means that the uncompressed file size is a bit larger, but the files |
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compress better, e.g. with F<upx>). |
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Last not least, if you need accurate line numbers in error messages, |
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or in the unlikely case where C<pod> is too slow, or some module gets |
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mistreated, you can specify C<none> to not mangle included perl sources in |
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any way. |
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=item --perl |
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After writing out the bundle files, try to link a new perl interpreter. It |
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will be called F<perl> and will be left in the current working |
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directory. The bundle files will be removed. |
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This switch is automatically used when F<staticperl> is invoked with the |
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C<mkperl> command (instead of C<mkbundle>): |
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# build a new ./perl with only common::sense in it - very small :) |
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staticperl mkperl -Mcommon::sense |
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=item --use module | -Mmodule |
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Include the named module and all direct dependencies. This is done by |
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C<require>'ing the module in a subprocess and tracing which other modules |
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and files it actually loads. If the module uses L<AutoLoader>, then all |
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splitfiles will be included as well. |
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Example: include AnyEvent and AnyEvent::Impl::Perl. |
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staticperl mkbundle --use AnyEvent --use AnyEvent::Impl::Perl |
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Sometimes you want to load old-style "perl libraries" (F<.pl> files), or |
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maybe other weirdly named files. To do that, you need to quote the name in |
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1.3 |
single or double quotes. When given on the command line, you probably need |
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to quote once more to avoid your shell interpreting it. Common cases that |
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need this are F<Config_heavy.pl> and F<utf8_heavy.pl>. |
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Example: include the required files for F<perl -V> to work in all its |
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glory (F<Config.pm> is included automatically by this). |
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# bourne shell |
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staticperl mkbundle --use '"Config_heavy.pl"' |
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# bundle specification file |
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use "Config_heavy.pl" |
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The C<-Mmodule> syntax is included as an alias that might be easier to |
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remember than C<use>. Or maybe it confuses people. Time will tell. Or |
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maybe not. Argh. |
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=item --eval "perl code" | -e "perl code" |
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Sometimes it is easier (or necessary) to specify dependencies using perl |
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code, or maybe one of the modules you use need a special use statement. In |
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that case, you can use C<eval> to execute some perl snippet or set some |
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variables or whatever you need. All files C<require>'d or C<use>'d in the |
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script are included in the final bundle. |
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Keep in mind that F<mkbundle> will only C<require> the modules named |
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by the C<--use> option, so do not expect the symbols from modules you |
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1.3 |
C<--use>'d earlier on the command line to be available. |
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Example: force L<AnyEvent> to detect a backend and therefore include it |
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in the final bundle. |
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staticperl mkbundle --eval 'use AnyEvent; AnyEvent::detect' |
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# or like this |
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staticperl mkbundle -MAnyEvent --eval 'use AnyEvent; AnyEvent::detect' |
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Example: use a separate "bootstrap" script that C<use>'s lots of modules |
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and include this in the final bundle, to be executed automatically. |
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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 |
root |
1.3 |
the perl interpreter executes scripts given on the command line (or via |
370 |
root |
1.2 |
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 --static |
389 |
|
|
|
390 |
|
|
When C<--perl> is also given, link statically instead of dynamically. The |
391 |
|
|
default is to link the new perl interpreter fully dynamic (that means all |
392 |
|
|
perl modules are linked statically, but all external libraries are still |
393 |
|
|
referenced dynamically). |
394 |
|
|
|
395 |
|
|
Keep in mind that Solaris doesn't support static linking at all, and |
396 |
|
|
systems based on GNU libc don't really support it in a usable fashion |
397 |
|
|
either. Try uClibc if you want to create fully statically linked |
398 |
|
|
executables, or try the C<--staticlibs> option to link only some libraries |
399 |
|
|
statically. |
400 |
|
|
|
401 |
|
|
=item any other argument |
402 |
|
|
|
403 |
|
|
Any other argument is interpreted as a bundle specification file, which |
404 |
|
|
supports most long options (without extra quoting), one option per line. |
405 |
root |
1.1 |
|
406 |
|
|
=back |
407 |
|
|
|
408 |
|
|
=head2 F<STATCPERL> CONFIGURATION AND HOOKS |
409 |
|
|
|
410 |
root |
1.2 |
During (each) startup, F<staticperl> tries to source the following shell |
411 |
|
|
files in order: |
412 |
|
|
|
413 |
|
|
/etc/staticperlrc |
414 |
|
|
~/.staticperlrc |
415 |
|
|
$STATICPERL/rc |
416 |
|
|
|
417 |
|
|
They can be used to override shell variables, or define functions to be |
418 |
|
|
called at specific phases. |
419 |
|
|
|
420 |
|
|
Note that the last file is erased during F<staticperl distclean>, so |
421 |
|
|
generally should not be used. |
422 |
|
|
|
423 |
|
|
=head3 CONFIGURATION VARIABLES |
424 |
|
|
|
425 |
|
|
=head4 Variables you I<should> override |
426 |
|
|
|
427 |
|
|
=over 4 |
428 |
|
|
|
429 |
|
|
=item C<EMAIL> |
430 |
|
|
|
431 |
|
|
The e-mail address of the person who built this binary. Has no good |
432 |
|
|
default, so should be specified by you. |
433 |
|
|
|
434 |
|
|
=back |
435 |
|
|
|
436 |
root |
1.5 |
=head4 Variables you might I<want> to override |
437 |
root |
1.2 |
|
438 |
|
|
=over 4 |
439 |
|
|
|
440 |
|
|
=item C<PERLVER> |
441 |
|
|
|
442 |
|
|
The perl version to install - default is currently C<5.12.2>, but C<5.8.9> |
443 |
|
|
is also a good choice (5.8.9 is much smaller than 5.12.2, while 5.10.1 is |
444 |
|
|
about as big as 5.12.2). |
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 |
root |
1.6 |
=item C<EXTRA_MODULES> |
451 |
root |
1.2 |
|
452 |
root |
1.6 |
Additional modules installed during F<staticperl install>. Here you can |
453 |
|
|
set which modules you want have to installed from CPAN. |
454 |
root |
1.2 |
|
455 |
root |
1.6 |
Example: I really really need EV, AnyEvent, Coro and IO::AIO. |
456 |
root |
1.2 |
|
457 |
root |
1.6 |
EXTRA_MODULES="EV AnyEvent Coro IO::AIO" |
458 |
root |
1.2 |
|
459 |
root |
1.6 |
Note that you can also use a C<postinstall> hook to achieve this, and |
460 |
|
|
more. |
461 |
root |
1.2 |
|
462 |
root |
1.6 |
=item C<PERL_MM_USE_DEFAULT>, C<EV_EXTRA_DEFS>, ... |
463 |
root |
1.2 |
|
464 |
|
|
Usually set to C<1> to make modules "less inquisitive" during their |
465 |
|
|
installation, you can set any environment variable you want - some modules |
466 |
|
|
(such as L<Coro> or L<EV>) use environment variables for further tweaking. |
467 |
|
|
|
468 |
root |
1.6 |
=item C<STATICPERL> |
469 |
|
|
|
470 |
|
|
The directory where staticperl stores all its files |
471 |
|
|
(default: F<~/.staticperl>). |
472 |
root |
1.2 |
|
473 |
root |
1.6 |
=item C<PREFIX> |
474 |
root |
1.2 |
|
475 |
root |
1.6 |
The prefix where perl gets installed (default: F<$STATICPERL/perl>), |
476 |
|
|
i.e. where the F<bin> and F<lib> subdirectories will end up. |
477 |
root |
1.2 |
|
478 |
root |
1.6 |
=item C<PERL_CPPFLAGS>, C<PERL_OPTIMIZE>, C<PERL_LDFLAGS>, C<PERL_LIBS> |
479 |
root |
1.2 |
|
480 |
root |
1.6 |
These flags are passed to perl's F<Configure> script, and are generally |
481 |
|
|
optimised for small size (at the cost of performance). Since they also |
482 |
|
|
contain subtle workarounds around various build issues, changing these |
483 |
|
|
usually requires understanding their default values - best look at the top |
484 |
|
|
of the F<staticperl> script for more info on these. |
485 |
root |
1.2 |
|
486 |
|
|
=back |
487 |
|
|
|
488 |
root |
1.5 |
=head4 Variables you probably I<do not want> to override |
489 |
root |
1.2 |
|
490 |
|
|
=over 4 |
491 |
|
|
|
492 |
|
|
=item C<MKBUNDLE> |
493 |
|
|
|
494 |
|
|
Where F<staticperl> writes the C<mkbundle> command to |
495 |
|
|
(default: F<$STATICPERL/mkbundle>). |
496 |
|
|
|
497 |
|
|
=item C<STATICPERL_MODULES> |
498 |
|
|
|
499 |
|
|
Additional modules needed by C<mkbundle> - should therefore not be changed |
500 |
|
|
unless you know what you are doing. |
501 |
|
|
|
502 |
|
|
=back |
503 |
|
|
|
504 |
|
|
=head3 OVERRIDABLE HOOKS |
505 |
|
|
|
506 |
|
|
In addition to environment variables, it is possible to provide some |
507 |
|
|
shell functions that are called at specific times. To provide your own |
508 |
root |
1.3 |
commands, just define the corresponding function. |
509 |
root |
1.2 |
|
510 |
|
|
Example: install extra modules from CPAN and from some directories |
511 |
|
|
at F<staticperl install> time. |
512 |
|
|
|
513 |
|
|
postinstall() { |
514 |
root |
1.4 |
rm -rf lib/threads* # weg mit Schaden |
515 |
root |
1.2 |
instcpan IO::AIO EV |
516 |
|
|
instsrc ~/src/AnyEvent |
517 |
|
|
instsrc ~/src/XML-Sablotron-1.0100001 |
518 |
root |
1.4 |
instcpan Anyevent::AIO AnyEvent::HTTPD |
519 |
root |
1.2 |
} |
520 |
|
|
|
521 |
|
|
=over 4 |
522 |
|
|
|
523 |
|
|
=item postconfigure |
524 |
|
|
|
525 |
|
|
Called after configuring, but before building perl. Current working |
526 |
|
|
directory is the perl source directory. |
527 |
|
|
|
528 |
|
|
Could be used to tailor/patch config.sh (followed by F<./Configure -S>) or |
529 |
|
|
do any other modifications. |
530 |
|
|
|
531 |
|
|
=item postbuild |
532 |
|
|
|
533 |
|
|
Called after building, but before installing perl. Current working |
534 |
|
|
directory is the perl source directory. |
535 |
|
|
|
536 |
|
|
I have no clue what this could be used for - tell me. |
537 |
|
|
|
538 |
|
|
=item postinstall |
539 |
|
|
|
540 |
|
|
Called after perl and any extra modules have been installed in C<$PREFIX>, |
541 |
|
|
but before setting the "installation O.K." flag. |
542 |
|
|
|
543 |
|
|
The current working directory is C<$PREFIX>, but maybe you should not rely |
544 |
|
|
on that. |
545 |
|
|
|
546 |
|
|
This hook is most useful to customise the installation, by deleting files, |
547 |
|
|
or installing extra modules using the C<instcpan> or C<instsrc> functions. |
548 |
|
|
|
549 |
|
|
The script must return with a zero exit status, or the installation will |
550 |
|
|
fail. |
551 |
|
|
|
552 |
|
|
=back |
553 |
root |
1.1 |
|
554 |
root |
1.9 |
=head1 ANATOMY OF A BUNDLE |
555 |
|
|
|
556 |
|
|
When not building a new perl binary, C<mkbundle> will leave a number of |
557 |
|
|
files in the current working directory, which can be used to embed a perl |
558 |
|
|
interpreter in your program. |
559 |
|
|
|
560 |
|
|
Intimate knowledge of L<perlembed> and preferably some experience with |
561 |
|
|
embedding perl is highly recommended. |
562 |
|
|
|
563 |
|
|
C<mkperl> (or the C<--perl> option) basically does this to link the new |
564 |
|
|
interpreter (it also adds a main program to F<bundle.>): |
565 |
|
|
|
566 |
|
|
$Config{cc} $(cat bundle.ccopts) -o perl bundle.c $(cat bundle.ldopts) |
567 |
|
|
|
568 |
|
|
=over 4 |
569 |
|
|
|
570 |
|
|
=item bundle.h |
571 |
|
|
|
572 |
|
|
A header file that contains the prototypes of the few symbols "exported" |
573 |
|
|
by bundle.c, and also exposes the perl headers to the application. |
574 |
|
|
|
575 |
|
|
=over 4 |
576 |
|
|
|
577 |
|
|
=item staticperl_init () |
578 |
|
|
|
579 |
|
|
Initialises the perl interpreter. You can use the normal perl functions |
580 |
|
|
after calling this function, for example, to define extra functions or |
581 |
|
|
to load a .pm file that contains some initialisation code, or the main |
582 |
|
|
program function: |
583 |
|
|
|
584 |
|
|
XS (xsfunction) |
585 |
|
|
{ |
586 |
|
|
dXSARGS; |
587 |
|
|
|
588 |
|
|
// now we have items, ST(i) etc. |
589 |
|
|
} |
590 |
|
|
|
591 |
|
|
static void |
592 |
|
|
run_myapp(void) |
593 |
|
|
{ |
594 |
|
|
staticperl_init (); |
595 |
|
|
newXSproto ("myapp::xsfunction", xsfunction, __FILE__, "$$;$"); |
596 |
|
|
eval_pv ("require myapp::main", 1); // executes "myapp/main.pm" |
597 |
|
|
} |
598 |
|
|
|
599 |
|
|
=item staticperl_xs_init (pTHX) |
600 |
|
|
|
601 |
|
|
Sometimes you need direct control over C<perl_parse> and C<perl_run>, in |
602 |
|
|
which case you do not want to use C<staticperl_init> but call them on your |
603 |
|
|
own. |
604 |
|
|
|
605 |
|
|
Then you need this function - either pass it directly as the C<xs_init> |
606 |
|
|
function to C<perl_parse>, or call it from your own C<xs_init> function. |
607 |
|
|
|
608 |
|
|
=item staticperl_cleanup () |
609 |
|
|
|
610 |
|
|
In the unlikely case that you want to destroy the perl interpreter, here |
611 |
|
|
is the corresponding function. |
612 |
|
|
|
613 |
|
|
=item PerlInterpreter *staticperl |
614 |
|
|
|
615 |
|
|
The perl interpreter pointer used by staticperl. Not normally so useful, |
616 |
|
|
but there it is. |
617 |
|
|
|
618 |
|
|
=back |
619 |
|
|
|
620 |
|
|
=item bundle.ccopts |
621 |
|
|
|
622 |
|
|
Contains the compiler options required to compile at least F<bundle.c> and |
623 |
|
|
any file that includes F<bundle.h> - you should probably use it in your |
624 |
|
|
C<CFLAGS>. |
625 |
|
|
|
626 |
|
|
=item bundle.ldopts |
627 |
|
|
|
628 |
|
|
The linker options needed to link the final program. |
629 |
|
|
|
630 |
|
|
=back |
631 |
|
|
|
632 |
|
|
=head1 RUNTIME FUNCTIONALITY |
633 |
|
|
|
634 |
|
|
Binaries created with C<mkbundle>/C<mkperl> contain extra functions, which |
635 |
|
|
are required to access the bundled perl sources, but might be useful for |
636 |
|
|
other purposes. |
637 |
|
|
|
638 |
|
|
In addition, for the embedded loading of perl files to work, F<staticperl> |
639 |
|
|
overrides the C<@INC> array. |
640 |
|
|
|
641 |
|
|
=over 4 |
642 |
|
|
|
643 |
|
|
=item $file = staticperl::find $path |
644 |
|
|
|
645 |
|
|
Returns the data associated with the given C<$path> |
646 |
|
|
(e.g. C<Digest/MD5.pm>, C<auto/POSIX/autosplit.ix>), which is basically |
647 |
|
|
the UNIX path relative to the perl library directory. |
648 |
|
|
|
649 |
|
|
Returns C<undef> if the file isn't embedded. |
650 |
|
|
|
651 |
|
|
=item @paths = staticperl::list |
652 |
|
|
|
653 |
|
|
Returns the list of all paths embedded in this binary. |
654 |
|
|
|
655 |
|
|
=back |
656 |
|
|
|
657 |
|
|
=head1 FULLY STATIC BINARIES - BUILDROOT |
658 |
|
|
|
659 |
|
|
To make truly static (linux-) libraries, you might want to have a look at |
660 |
|
|
buildroot (L<http://buildroot.uclibc.org/>). |
661 |
|
|
|
662 |
|
|
Buildroot is primarily meant to set up a cross-compile environment (which |
663 |
|
|
is not so useful as perl doesn't quite like cross compiles), but it can also compile |
664 |
|
|
a chroot environment where you can use F<staticperl>. |
665 |
|
|
|
666 |
|
|
To do so, download buildroot, and enable "Build options => development |
667 |
|
|
files in target filesystem" and optionally "Build options => gcc |
668 |
|
|
optimization level (optimize for size)". At the time of writing, I had |
669 |
|
|
good experiences with GCC 4.4.x but not GCC 4.5. |
670 |
|
|
|
671 |
|
|
To minimise code size, I used C<-pipe -ffunction-sections -fdata-sections |
672 |
|
|
-finline-limit=8 -fno-builtin-strlen -mtune=i386>. The C<-mtune=i386> |
673 |
|
|
doesn't decrease codesize much, but it makes the file much more |
674 |
|
|
compressible. |
675 |
|
|
|
676 |
|
|
If you don't need Coro or threads, you can go with "linuxthreads.old" (or |
677 |
|
|
no thread support). For Coro, it is highly recommended to switch to a |
678 |
|
|
uClibc newer than 0.9.31 (at the time of this writing, I used the 20101201 |
679 |
|
|
snapshot) and enable NPTL, otherwise Coro needs to be configured with the |
680 |
|
|
ultra-slow pthreads backend to work around linuxthreads bugs (it also uses |
681 |
|
|
twice the address space needed for stacks). |
682 |
|
|
|
683 |
|
|
C<ccache> support is also recommended, especially if you want to |
684 |
|
|
play around with buildroot options. Enabling the C<miniperl> package |
685 |
|
|
will probably enable all options required for a successful perl |
686 |
|
|
build. F<staticperl> itself additionally needs either C<wget> or C<curl>. |
687 |
|
|
|
688 |
|
|
As for shells, busybox should provide all that is needed, but the default |
689 |
|
|
busybox configuration doesn't include F<comm> which is needed by perl - |
690 |
|
|
either make a custom busybox config, or compile coreutils. |
691 |
|
|
|
692 |
|
|
For the latter route, you might find that bash has some bugs that keep |
693 |
|
|
it from working properly in a chroot - either use dash (and link it to |
694 |
|
|
F</bin/sh> inside the chroot) or link busybox to F</bin/sh>, using it's |
695 |
|
|
built-in ash shell. |
696 |
|
|
|
697 |
|
|
Finally, you need F</dev/null> inside the chroot for many scripts to work |
698 |
|
|
- F<cp /dev/null output/target/dev> or bind-mounting your F</dev> will |
699 |
|
|
both provide this. |
700 |
|
|
|
701 |
|
|
After you have compiled and set up your buildroot target, you can copy |
702 |
|
|
F<staticperl> from the C<App::Staticperl> distribution or from your |
703 |
|
|
perl f<bin> directory (if you installed it) into the F<output/target> |
704 |
|
|
filesystem, chroot inside and run it. |
705 |
|
|
|
706 |
root |
1.1 |
=head1 AUTHOR |
707 |
|
|
|
708 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
709 |
|
|
http://software.schmorp.de/pkg/staticperl.html |