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.
Adds ``extern ``C to the C code.
Adds exception handling stubs to the C code.
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.
Prints the xsubpp version number to standard output, then exits.
By default xsubpp will not automatically generate prototype code for all xsubs. This flag will enable prototypes.
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.
Prevents the inclusion of `#line' directives in the output.
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.
Disable recognition of IN, OUT_LIST and INOUT_LIST declarations.