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XSUBPP(1)			 Perl Programmers Reference Guide			XSUBPP(1)

NAME
       xsubpp - compiler to convert Perl XS code into C code

SYNOPSIS
       xsubpp [-v] [-except] [-s pattern] [-prototypes] [-noversioncheck] [-nolinenumbers]
       [-nooptimize] [-typemap typemap] [-output filename]... file.xs

DESCRIPTION
       This compiler is typically run by the makefiles created by ExtUtils::MakeMaker.

       xsubpp 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

       It will also use a default typemap installed as "ExtUtils::typemap".

OPTIONS
       Note that the "XSOPT" MakeMaker option may be used to add these options to any makefiles
       generated by MakeMaker.

       -hiertype
	    Retains '::' in type names so that C++ hierarchical types can be mapped.

       -except
	    Adds exception handling stubs to the C code.

       -typemap typemap
	    Indicates that a user-supplied typemap should take precedence over the default
	    typemaps.  This option may be used multiple times, with the last typemap having the
	    highest precedence.

       -output filename
	    Specifies the name of the output file to generate.	If no file is specified, output
	    will be written to standard output.

       -v   Prints the xsubpp version number to standard output, then exits.

       -prototypes
	    By default xsubpp will not automatically generate prototype code for all xsubs. This
	    flag will enable prototypes.

       -noversioncheck
	    Disables the run time test that determines if the object file (derived from the ".xs"
	    file) and the ".pm" files have the same version number.

       -nolinenumbers
	    Prevents the inclusion of `#line' directives in the output.

       -nooptimize
	    Disables certain optimizations.  The only optimization that is currently affected is
	    the use of targets by the output C code (see perlguts).  This may significantly slow
	    down the generated code, but this is the way xsubpp of 5.005 and earlier operated.

       -noinout
	    Disable recognition of "IN", "OUT_LIST" and "INOUT_LIST" declarations.

       -noargtypes
	    Disable recognition of ANSI-like descriptions of function signature.

       -C++ Currently doesn't do anything at all.  This flag has been a no-op for many versions
	    of perl, at least as far back as perl5.003_07.  It's allowed here for backwards
	    compatibility.

ENVIRONMENT
       No environment variables are used.

AUTHOR
       Originally by Larry Wall.  Turned into the "ExtUtils::ParseXS" module by Ken Williams.

MODIFICATION HISTORY
       See the file Changes.

SEE ALSO
       perl(1), perlxs(1), perlxstut(1), ExtUtils::ParseXS

perl v5.12.4				    2013-03-18					XSUBPP(1)
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