VMS Help CC, Messages, EXTENDTYPE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        This platform specific type is a language extension.

 Description    The use of the types __int8, __int16, __int32,
                __int64, __f_float, __g_float, __s_float, __t_float
                might not be portable to other platforms or to other
                C compilers.

 User Action    Be aware of this portability concern.