Summary: Check for CROSS_COMPILE_ARCH being set as an indicator to use ALT_COMPILER_PATH
Reviewed-by: acorn, ohair

Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

Reviewed-by: never
Contributed-by: NAndrew Haley <aph@redhat.com>