* acconfig.h (HAVE_VOLATILE): Insert stub for autoconf.
        * alocal.m4 (GCC_C_VOLATILE): New autoconf test.
        * configure.in: Use GCC_C_VOLATILE.
        * system.h (volatile): Define as empty if no volatile support is
        available.
        * genemit.c (output_add_clobbers): Removed unused variable 'i' from
        generated fucntion.

From-SVN: r19653