* c-common.c (builtin_define_type_max): New.
        (cb_register_builtins): Define __SCHAR_MAX__, __SHRT_MAX__,
        __INT_MAX__, __LONG_MAX__, __LONG_LONG_MAX__, __CHAR_BIT__.

        From Joseph S. Myers:
        * glimits.h: Rewrite to expect the double underscore definitions
        from the compiler.

        * config/alpha/unicosmk.h, config/avr/avr.h, config/h8300/h8300.h,
        config/i386/linux64.h, config/ia64/aix.h, config/ia64/hpux.h,
        config/ia64/ia64.h, config/m68hc11/m68hc11.h, config/m68hc11/m68hc12.h,
        config/mips/mips.h, config/mmix/mmix.h, config/mn10200/mn10200.h,
        config/pa/pa.h, config/rs6000/aix43.h, config/rs6000/aix51.h,
        config/rs6000/linux64.h, config/s390/linux.h, config/sh/sh.h,
        config/stormy16/stormy16.h: Don't define any of __SHRT_MAX__,
        __INT_MAX__, __LONG_MAX__, or __LONG_LONG_MAX__.

From-SVN: r54544