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



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

SYNOPSIS
       xsubpp [-v] [-C++] [-except] [-s pattern] [-prototypes] [-nover-
       sioncheck] [-nolinenumbers] [-nooptimize] [-typemap typemap] ...
       file.xs

DESCRIPTION
       This compiler is typically run by the makefiles created by ExtU-
       tils::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

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

       -C++ Adds ''extern "C"'' to the C code.

       -hiertype
	    Retains '::' in type names so that C++ hierachical 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.

       -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" declara-
	    tions.

       -noargtypes
	    Disable recognition of ANSI-like descriptions of function signa-
	    ture.

ENVIRONMENT
       No environment variables are used.

AUTHOR
       Larry Wall

MODIFICATION HISTORY
       See the file changes.pod.

SEE ALSO
       perl(1), perlxs(1), perlxstut(1)



perl v5.8.5			  2006-08-12			    XSUBPP(1)

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