ExtUti...ParseXS(3perl) Perl Programmers Reference GuideExtUti...ParseXS(3perl)
NAME
ExtUtils::ParseXS - converts Perl XS code into C code
SYNOPSIS
use ExtUtils::ParseXS;
my $pxs = ExtUtils::ParseXS->new;
$pxs->process_file( filename => 'foo.xs' );
$pxs->process_file( filename => 'foo.xs',
output => 'bar.c',
'C++' => 1,
typemap => 'path/to/typemap',
hiertype => 1,
except => 1,
versioncheck => 1,
linenumbers => 1,
optimize => 1,
prototypes => 1,
die_on_error => 0,
);
# Legacy non-OO interface using a singleton:
use ExtUtils::ParseXS qw(process_file);
process_file( filename => 'foo.xs' );
DESCRIPTION
"ExtUtils::ParseXS" will compile XS code into C code by embedding the
constructs necessary to let C functions manipulate Perl values and
creates the glue necessary to let Perl access those functions. The
compiler uses typemaps to determine how to map C function parameters and
variables to Perl values.
The compiler will search for typemap files called typemap. It will use
the following search path to find default typemaps, with the rightmost
typemap taking precedence.
../../../typemap:../../typemap:../typemap:typemap
EXPORT
None by default. process_file() and/or report_error_count() may be
exported upon request. Using the functional interface is discouraged.
METHODS
$pxs->new()
Returns a new, empty XS parser/compiler object.
$pxs->process_file()
This method processes an XS file and sends output to a C file. The
method may be called as a function (this is the legacy interface)
and will then use a singleton as invocant.
Named parameters control how the processing is done. The following
parameters are accepted:
C++ Adds "extern "C"" to the C code. Default is false.
hiertype
Retains "::" in type names so that C++ hierarchical types can be
mapped. Default is false.
except
Adds exception handling stubs to the C code. Default is false.
typemap
Indicates that a user-supplied typemap should take precedence
over the default typemaps. A single typemap may be specified as
a string, or multiple typemaps can be specified in an array
reference, with the last typemap having the highest precedence.
prototypes
Generates prototype code for all xsubs. Default is false.
versioncheck
Makes sure at run time that the object file (derived from the
".xs" file) and the ".pm" files have the same version number.
Default is true.
linenumbers
Adds "#line" directives to the C output so error messages will
look like they came from the original XS file. Default is true.
optimize
Enables certain optimizations. The only optimization that is
currently affected is the use of targets by the output C code
(see perlguts). Not optimizing may significantly slow down the
generated code, but this is the way xsubpp of 5.005 and earlier
operated. Default is to optimize.
inout
Enable recognition of "IN", "OUT_LIST" and "INOUT_LIST"
declarations. Default is true.
argtypes
Enable recognition of ANSI-like descriptions of function
signature. Default is true.
s Maintainer note: I have no clue what this does. Strips function
prefixes?
die_on_error
Normally ExtUtils::ParseXS will terminate the program with an
exit(1) after printing the details of the exception to STDERR
via (warn). This can be awkward when it is used programmatically
and not via xsubpp, so this option can be used to cause it to
die instead by providing a true value. When not provided this
defaults to the value of $ExtUtils::ParseXS::DIE_ON_ERROR which
in turn defaults to false.
$pxs->report_error_count()
This method returns the number of [a certain kind of] errors
encountered during processing of the XS file.
The method may be called as a function (this is the legacy
interface) and will then use a singleton as invocant.
AUTHOR
Based on xsubpp code, written by Larry Wall.
Maintained by:
• Ken Williams, <ken@mathforum.org>
• David Golden, <dagolden@cpan.org>
• James Keenan, <jkeenan@cpan.org>
• Steffen Mueller, <smueller@cpan.org>
COPYRIGHT
Copyright 2002-2014 by Ken Williams, David Golden and other
contributors. All rights reserved.
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
Based on the "ExtUtils::xsubpp" code by Larry Wall and the Perl 5
Porters, which was released under the same license terms.
SEE ALSO
perl, ExtUtils::xsubpp, ExtUtils::MakeMaker, perlxs, perlxstut.
perl v5.40.1 2026-08-30 ExtUti...ParseXS(3perl)
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