io/io_win32.c: according to my MSVC docs, you should use _tcslen only after #including tchar.h
Index: io/io_win32.c =================================================================== RCS file: /home/perlcvs/parrot/io/io_win32.c,v retrieving revision 1.2 diff -u -2 -r1.2 io_win32.c --- io/io_win32.c 12 Jan 2002 15:14:56 -0000 1.2 +++ io/io_win32.c 13 Jan 2002 18:40:12 -0000 @@ -16,4 +16,6 @@ #ifdef WIN32 +#include <tchar.h> + /* Defined at bottom */ extern ParrotIOLayerAPI pio_win32_layer_api;