--- App-Staticperl/staticperl.pod 2011/06/27 21:56:51 1.45 +++ App-Staticperl/staticperl.pod 2011/07/10 01:37:56 1.48 @@ -86,7 +86,7 @@ This means the modules to include often need to be tweaked manually. All this does not preclude more permissive modes to be implemented in -the future, but right now, you have to resolve state hidden dependencies +the future, but right now, you have to resolve hidden dependencies manually. =item * PAR works out of the box, F does not. @@ -204,7 +204,9 @@ Starts an interactive CPAN shell that you can use to install further modules. Installs the perl first if necessary, but apart from that, no magic is involved: you could just as well run it manually via -F<~/.staticperl/perl/bin/cpan>. +F<~/.staticperl/perl/bin/cpan>, except that F additionally +sets the environment variable C<$PERL> to the path of the perl +interpreter, which is handy in subshells. Any additional arguments are simply passed to the F command. @@ -549,16 +551,16 @@ without any postprocessing (perl files might get stripped to reduce their size). -If you specify an alias you should probably add a C<&> prefix to avoid -clashing with embedded perl files (whose paths never start with C<&>), -and/or use a special directory prefix, such as C<&res/name>. +If you specify an alias you should probably add a C prefix to avoid +clashing with embedded perl files (whose paths never start with C), +and/or use a special directory prefix, such as C. You can later get a copy of these files by calling C. An alternative way to embed binary files is to convert them to perl and use C to get the contents - this method is a bit cumbersome, but works -both inside and outside of a staticperl bundle: +both inside and outside of a staticperl bundle, without extra ado: # a "binary" file, call it "bindata.pl" <<'SOME_MARKER' @@ -568,6 +570,23 @@ # load the binary chomp (my $data = do "bindata.pl"); +=item C<--allow-dynamic> + +By default, when F hits a dynamic perl extension (e.g. a F<.so> +or F<.dll> file), it will stop with a fatal error. + +When this option is enabled, F packages the shared +object into the bundle instead, with a prefix of F +(e.g. F). What you do with that is currently up +to you, F has no special support for this at the moment, apart +from working around the lack of availability of F while +bootstrapping, at a speed cost. + +One way to deal with this is to write all files starting with F into +some directory and then C that path onto C<@INC>. + +#TODO: example + =back =item Step 2: filter all files using C<--include> and C<--exclude> options. @@ -1124,20 +1143,66 @@ =head1 RUNTIME FUNCTIONALITY -Binaries created with C/C contain extra functions, which -are required to access the bundled perl sources, but might be useful for -other purposes. +Binaries created with C/C contain extra functionality, +mostly related to the extra files bundled in the binary (the virtual +filesystem). All of this data is statically compiled into the binary, and +accessing means copying it from a read-only section of your binary. Data +pages in this way is usually freed by the operating system, as it isn't +use more the onace. + +=head2 VIRTUAL FILESYSTEM + +Every bundle has a virtual filesystem. The only information stored in it +is the path and contents of each file that was bundled. + +=head3 LAYOUT + +Any path starting with an ampersand (F<&>) or exclamation mark (F) are +reserved by F. They must only be used as described in this +section. -In addition, for the embedded loading of perl files to work, F -overrides the C<@INC> array. +=over 4 + +=item ! + +All files that typically cannot be loaded from memory (such as dynamic +objects or shared libraries), but have to reside in the filesystem, are +prefixed with F. Typically these files get written out to some +(semi-)temporary directory shortly after program startup, or before being +used. + +=item !boot + +The bootstrap file, if specified during bundling. + +=item !auto/ + +Shared objects or dlls corresponding to dynamically-linked perl extensions +are stored with an F prefix. + +=item !lib/ + +External shared libraries are stored in this directory. + +=item any letter + +Any path starting with a letter is a perl library file. For example, +F corresponds to the file loaded by C, and +F corresponds to C. + +Obviously, module names shouldn't start with any other characters than +letters :) + +=back + +=head3 FUNCTIONS =over 4 =item $file = staticperl::find $path Returns the data associated with the given C<$path> -(e.g. C, C), which is basically -the UNIX path relative to the perl library directory. +(e.g. C, C). Returns C if the file isn't embedded. @@ -1147,6 +1212,11 @@ =back +=head2 EXTRA FEATURES + +In addition, for the embedded loading of perl files to work, F +overrides the C<@INC> array. + =head1 FULLY STATIC BINARIES - UCLIBC AND BUILDROOT To make truly static (Linux-) libraries, you might want to have a look at