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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] [-C++] [-csuffix csuffix] [-except] [-s pattern] [-prototypes] [-noversioncheck] [-nolinenumbers]
       [-nooptimize] [-typemap typemap] ... 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

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

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

       -csuffix csuffix
            Set the suffix used for the generated C or C++ code.  Defaults to '.c' (even with -C++), but some plat-
            forms might want to have e.g. '.cpp'.  Don't forget the '.' from the front.

       -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 pro-
            totypes.

       -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.

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 v5.8.8                       2012-01-22                         XSUBPP(1)