http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50568
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2011-09-29 18:19:30 UTC --- HOST_WIDE_INT is needed for gcc, libcpp and plug-in. We should have a central host-wide-int.m4 to define all HOST_WIDE_INT related macros.