#include "EXTERN.h" #include "perl.h" #include "XSUB.h" #include "mylib/mylib.h" #include "ppport.h" #include <./Mytest2/mylib/mylib.h> #include "const-c.inc" MODULE = Mytest2 PACKAGE = Mytest2 INCLUDE: const-xs.inc double foo(a,b,c) int a long b const char * c OUTPUT: RETVAL

...and there's also a typemap file in this directory, which only has one line:

const char * T_PV