/ 
XS-Install-1.3.5
River stage two • 42 direct dependents • 46 total dependents
/ XS::Install

NAME

XS::Install - ExtUtils::MakeMaker based module installer for XS modules.

DESCRIPTION

To high-level overview please read Shared XS modules manifesto.

XS::Install (formerly known as Panda::Install) makes it much easier to write MakeMaker's makefiles especially for XS modules. It provides dependecies support between XS modules, so that one could easily use header files, code, compilation options, ...etc of another. XS::Install also lets you put source files in subdirectories any level deep (MakeMaker doesn't handle that) and easily compile-in external C libraries.

The params for XS::Install are compatible with MakeMaker with some additions.

Also it greatly extends typemap functionality and adds C-like XS synopsis.

SYNOPSIS

# Makefile.PL
use XS::Install;

write_makefile(
    NAME    => 'My::XS',
    INC     => '-Isrc -I/usr/local/libevent/include',
    LIBS    => '-levent',
    SRC     => 'src', # all source files (code,header,xs) under 'src' are included in build
    C       => 'src2/foo.cc src2/bar.cc src3/baz/*.c', # plus src2/foo.cc, src2/bar.cc, and first-level c files in src3/baz/
    CPLUS   => 11,
    PAYLOAD => {
        # implements File::ShareDir functionality
        'data.txt'   => '/data.txt',
        'list.txt'   => '/',
        'abc.dat'    => '/mydir/bca.dat',
        'payloaddir' => '/',
    },
    BIN_DEPS  => ['XS::Module1', 'XS::Module2'],
    BIN_SHARE => {
        # modules that depend on My::XS will compile with this INC, LIBS, etc set.
        TYPEMAPS    => {'typemap1.map' => '/typemap.map'},
        INC         => '-I/usr/local/libevent/include', 
        INCLUDE     => {'src' => '/'},
        LIBS        => '-levent',
        DEFINE      => '-DHELLO_FROM_MYXS',
        CCFLAGS     => 'something',
    },
    postamble => 'mytarget: blah-blah; echo "hello"',
    CLIB => [{
        DIR    => 'libuv',
        FILE   => 'libuv.a',
        TARGET => 'libuv.a',
        FLAGS  => 'CFLAGS="-fPIC -O2"',
    }],
);

LOADING XS MODULE SYNOPSIS

package MyXSModule;
use XS::Loader;

our $VERSION = '1.0.0';
XS::Loader::load(); # same as XS::Loader::load('MyXSModule', $VERSION, 0x01);

see XS::Loader

C-LIKE XS SYNOPSIS

#include <xs.h>

char* my_xs_sub (SV* sv) { // CODE
    if (badsv(sv)) XSRETURN_UNDEF;
    RETVAL = process(sv);
}

void other_xs_sub (SV* sv) : ALIAS(other_name=1, yet_another=2) { // PPCODE
    xPUSHi(1);
    xPUSHi(2);
}

GETTING PAYLOAD SYNOPSIS

my $payload_dir = XS::Install::Payload::payload_dir('My::Module');

see XS::Install::Payload

FUNCTIONS

write_makefile(%params)

Writes makefile

not_available($msg)

If called, Makefile.PL will die with your $msg the way that CPAN testers will mark it as NA (not available) instead of UNKNOWN.

PARAMETERS

Only differences from MakeMaker params are listed.

ALL_FROM [default: NAME]

Sets ABSTRACT_FROM and VERSION_FROM to value of ALL_FROM.

VERSION_FROM [default: lib/Your/Package.pm]

If you don't specify VERSION_FROM, the default is your main package file

ABSTRACT_FROM [default: lib/Your/Package.pod or lib/Your/Package.pm]

If you don't specify ABSTRACT_FROM, the default is your main package pod file if it exists, otherwise main package file

XS [*.xs]

Sets source files for xsubpp. If you define this param, defaults are aborted.

XS => 'myxs/*.xs'
XS => 'file1.xs folder/file2.xs folder2/*.xs'
XS => ['file1.xs', 'folder/file2.xs folder2/*.xs']
C [*.c, *.cc, *.cxx, *.cpp, <xsubpp's output files>]

Sets source files to compile. If you define this param, defaults are aborted, however C files created by xsubpp are still included.

Usage: see "XS".

H [*.h *.hh *.hxx *.hpp]

Sets header files for makefile's dependencies (forces module to recompile if any of these changes). Useful during development. If you define this param, defaults are aborted.

Usage: see "XS".

SRC

Scans specified folder(s), finds all XS, C and H files and includes them in build. No matter whether you define XS/C/H parameters or not, SRCs are always added to them.

SRC => 'src'
SRC => 'src src2 src3',
SRC => ['src src2', 'src3'],
CPLUS

If true, will use c++ to build current extension. Additionally, if > 1, will set -std=c++<CPLUS> With this flag set, wraps every XSUB function into try-catch block, catching C++ exceptions and rethrowing it as perl exceptions. Additionally, the default extension for XS files output becomes .cc instead of .c

OPTIMIZE [-O2]

Default is -O2.

postamble

Passed unchanged to Makefile. Can be HASHREF for your convenience, in which case keys are ignored, values are concatenated in undefined order. If it is important to keep the order, ARRAYREF can be supplied.

postamble => 'sayhello: ; echo "hello"'
postamble => {
    memd_dep   => 'linkext:: libmemd/libmemd.a; cd libmemd && $(MAKE) static',
    memd_clean => 'clean:: ; cd libmemd && $(MAKE) clean',
}
postamble => [
    'linkext:: libmemd/libmemd.a; cd libmemd && $(MAKE) static',
    'clean:: ; cd libmemd && $(MAKE) clean',
]
PARSE_XS
PARSE_XS => 'XS::Framework::ParseXS'

Allows to inject custom ParseXS-plugin into xsubpp. As the module use on-the-fly patching of ExtUtils::ParseXS there is no sense of documenting it's internals, please, read the sources. Among the sources of XS::Framework you can find and example.

test/SRC
test/RECURSIVE_TEST_FILES

Sometimes XS-extension itself is written in C/C++, while XS/XSI files are only a thin perl-wrapper layer. In that cases it is desirable to test C/C++ code independently, but using perl-testing infrastructure. XS::Install does the trick: it compiles C/C++ test sources into additional XS-extension, and you should load it in perl t-files (see XS::Loader).

The compiled test XS-extension is not installed, and availale only during testing phase

test     => {
    SRC                  => 't',
    RECURSIVE_TEST_FILES => 1,
},

You still have to provide XS-file for the test extension. If you like to omit it and fond of Catch2 C++ module, then, please, familiarize yourself with Test::Catch module, which already provides all needed glue. To let C++ test work, there will be need:

# t/some-file.t
XS::Loader::load_noboot('MyTest');
Test::Catch::run('[tag]');

# t/some-file.cc
#include <catch2/catch.hpp>
TEST_CASE("description", "[tag]") {
	...
}
test/CCFLAGS

Concatenated with CCFLAGS, used when compiling test files.

test/OPTIMIZE

Concatenated with OPTIMIZE, used when compiling test files. Default to <-O0> to decrease tests compilation time (performance of running tests are usually affected by -O0 not really much).

MIN_PERL_VERSION [5.10.0]

Is set to 5.10.0 if you don't provide it.

PAYLOAD

Implements File::ShareDir functionality. Specified files are installed together with module and can later be accessed at runtime by the module itself or by other modules (via XS::Install::Payload's payload_dir()).

Value is a HASHREF where key is a file or directory path relative to module's dist dir and value is relative to payload's installation dir. If key is a directory then all content of that directory is installed to the destination path. If value is not specified (undef, '') then dest path is the same as source path.

Examples (given that $payload is a directory where payload is installed and $dist is a module's dist dir):

'file.txt' => ''       # $dist/file.txt => $payload/file.txt
'file.txt' => 'a.txt'  # $dist/file.txt => $payload/a.txt
'mydir'    => '',      # $dist/mydir    => $payload/mydir
'mydir'    => 'a/b/c', # $dist/mydir/*  => $payload/a/b/c/*
'mydir'    => '/',     # $dist/mydir/*  => $payload/*
PKG_CONFIG

List of system packages current module depends on. They will be searched via PkgConfig and their inc, cflags and ldflags will be automatically added to makefile. Also if your module has BIN_SHARE section then all packages in PKG_CONFIG goes to BIN_SHARE/PKG_CONFIG unless package name is prefixed with '-' (minus).

Examples:

PKG_CONFIG => 'openssl'
PKG_CONFIG => ['libzip', '-libcap']
BIN_DEPS

List of modules current module binary depends on. That means all that those modules specified in BIN_SHARE section will be applied while building current module. It also adds those modules to CONFIGURE_REQUIRES and PREREQ_PM sections.

Also if your module has BIN_SHARE section then all modules in BIN_DEPS goes to BIN_SHARE/PASSTHROUGH unless module name is prefixed with '-' (minus).

Examples:

BIN_DEPS => 'Module1'
BIN_DEPS => ['Module1', '-Module2']
BIN_SHARE

In this section you put values that you want to be applied to any module which specified your module as a dependency.

BIN_SHARE/TYPEMAPS

Installs specified typemaps and also adds it to the list of typemaps when building descendant modules.

Receives HASHREF, format is the same as for PAYLOAD, the only difference is that it scans folders for *.map files only.

BIN_SHARE/INC

Adds include file dirs to INC when building descendant modules.

BIN_SHARE/INCLUDE

Installs specified include files/dirs into module's installation include directory and adds that directory to INC when building descendant modules.

Receives HASHREF, format is the same as for PAYLOAD, the only difference is that it scans folders for header files only.

BIN_SHARE/LIBS

Added to LIBS when building descendant modules.

BIN_SHARE/DEFINE

Added to DEFINE when building descendant modules.

BIN_SHARE/CCFLAGS

Added to CCFLAGS when building descendant modules.

BIN_SHARE/XSOPT

Added to XSOPT when building descendant modules.

BIN_SHARE/PASSTHROUGH

Merge 'BIN_SHARE' of this module with 'BIN_SHARE' of specified modules. Everything gets concatenated (strings, arrays, etc) while merging. You don't need to manually manage this setting as it's managed automatically (see BIN_DEPS section).

BIN_SHARE/CPLUS

If set to true, will use c++ when building descendant modules. If > 1, then will use this version -std=c++<CPLUS> for building descendant modules (however if a descendant module sets its own CPLUS version then the highest version will be in use). Propagates all behaviour of CPLUS for descendant modules.

BIN_SHARE/PKG_CONFIG

All dependant modules will automatically get inc, cflags and ldflags of these system packages

CLIB

List of external C libraries that need to be built and compiled into the extension.

CLIB/DIR

Directory where external library is. Makefile must present in that directory!

CLIB/FILE

Static library file which is built by the library (relative to CLIB/DIR).

CLIB/TARGET

Name of the target for Makefile to built static library.

CLIB/FLAGS

Flags to build external library with.

C-LIKE XS

If you're using XS::Install then all of your XS files support C-like XS. It means that code

char* my_xs_sub (SV* sv) { // CODE
    if (badsv(sv)) XSRETURN_UNDEF;
    RETVAL = process(sv);
}

void other_xs_sub (SV* sv) : ALIAS(other_name=1, yet_another=2) { // PPCODE
    xPUSHi(1);
    xPUSHi(2);
}

is replaced with code

char*
my_xs_sub (SV* sv)
CODE:
    if (badsv(sv)) XSRETURN_UNDEF;
    RETVAL = process(sv);
OUTPUT:
    RETVAL

void
other_xs_sub (SV* sv)
ALIAS:
    other_name=1
    yet_another=2
PPCODE:
    xPUSHi(1);
    xPUSHi(2);

Note that writing

int myfunc (int a)

int myfunc (int a): ALIAS(other_name=1)

will result in default ParseXS behaviour (calling C function myfunc(a) and returning its result). That's because it has no body.

However this function has a body (empty) and therefore prevents default behaviour

int myfunc (int a) {}

It is possible to have split BOOT section across multiple xs/xsi source. The special macros-like keywords are available in .xs/.xsi files: __MODULE__ and __PACKAGE__, they will be replaced with corresponding string literals of the most recently parsed XS header. Here is an example:

# module.xs
MODULE = My::Module                PACKAGE = My::Module

INCLUDE: my-package1.xsi

INCLUDE: my-package2.xsi

# my-package1.xsi
MODULE = My::Module                PACKAGE = My::Module::Package1

BOOT {
	hello(__PACKAGE__);
}

# my-package2.xsi
MODULE = My::Module                PACKAGE = My::Module::Package2

BOOT {
	world(__PACKAGE__);
}

Will be merged into:

	BOOT {
		hello("My::Module::Package1");
		world("My::Module::Package2");
	}

ENVIRONMENT VARIABLES

CC
COMPILER

Allows to redefine the compiler in CC setting.

AUTHOR

Pronin Oleg <syber@crazypanda.ru>, Crazy Panda LTD

LICENSE

You may distribute this code under the same terms as Perl itself.