I'd rather have a macro HOST_WIDE_INT_C in hwint.h (like INTMAX_C etc. in stdint.h). HOST_WIDE_INT_1 is already defined in hwint.h to either 1L or 1LL; I'd suggest defining HOST_WIDE_INT_C to concatenate with either L or LL (and then HOST_WIDE_INT_1 can be HOST_WIDE_INT_C (1), unconditionally).
-- Joseph S. Myers jos...@codesourcery.com
