* config.gcc (powerpc*-*-*, rs6000-*-*-*): Don't bother including
	softfloat.h.
	* config/rs6000/vxppc.h (CPP_ENDIAN_BIG_SPEC): Delete.
	(CPP_ENDIAN_LITTLE_SPEC): Delete.
	* config/rs6000/sysv4le.h (CPP_ENDIAN_DEFAULT_SPEC): Delete.
	* config/rs6000/sysv4.h (CPP_SYSV_SPEC): Delete _SOFT_FLOAT setting,
	__LONG_DOUBLE_128__ setting, _CALL_* setting.
	(CPP_DEFAULT_SPEC): Delete.
	(CPP_FLOAT_DEFAULT_SPEC): Delete.
	(CPP_LONGDOUBLE_DEFAULT_SPEC): Delete.
	(CPP_SYSV_DEFAULT_SPEC): Delete.
	(CPP_ENDIAN_BIG_SPEC): Delete.
	(CPP_ENDIAN_LITTLE_SPEC): Delete.
	(CPP_ENDIAN_SPEC): Delete.
	(CPP_SPEC): Don't include cpp_endian, cpp_cpu.
	(SUBTARGET_EXTRA_SPECS): Delete cpp_sysv_default, cpp_endian_default,
	cpp_endian, cpp_endian_big, cpp_endian_little, cpp_float_default,
	cpp_longdouble_default.
	* config/rs6000/softfloat.h: Delete.
	* config/rs6000/rs6000.h (CPP_CPU_SPEC): Delete.
	(EXTRA_SPECS): Delete cpp_cpu.
	(TARGET_CPU_CPP_BUILTINS): New.
	* config/rs6000/rs6000-protos.h (rs6000_cpu_cpp_builtins): New
	prototype.
	* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): New.
	* config/rs6000/linux64.h (CPP_PREDEFINES): Remove endianness defines.
	(CPP_DEFAULT_SPEC): Delete.
	* config/rs6000/eabiaix.h (CPP_SYSV_DEFAULT_SPEC): Delete.
	* config/rs6000/darwin.h (CPP_PREDEFINES): Don't define __BIG_ENDIAN__.
	* config/rs6000/beos.h (CPP_SPEC): Remove cpp_cpu.
	(CPP_DEFAULT_SPEC): Delete.
	* config/rs6000/aix51.h (CPP_SPEC): Remove cpp_cpu, -D_ARCH_PPC.
	(CPLUSPLUS_CPP_SPEC): Likewise.
	(CPP_CPU_SPEC): Delete.
	(CPP_DEFAULT_SPEC): Delete.
	* config/rs6000/aix43.h (CPP_SPEC): Remove cpp_cpu, -D_ARCH_PPC.
	(CPLUSPLUS_CPP_SPEC): Likewise.
	(CPP_CPU_SPEC): Delete.
	(CPP_DEFAULT_SPEC): Delete.
	* config/rs6000/aix41.h (CPP_SPEC): Remove cpp_cpu.
	(CPP_DEFAULT_SPEC): Delete.
	* config/rs6000/aix.h (CPP_SPEC): Remove cpp_cpu.
	(CPP_DEFAULT_SPEC): Delete.

From-SVN: r54534