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- # ==========================================================================
- # Build system
- # ==========================================================================
- # Allow i486 insns (basically, bswap insn)
- # Do not try to tune for 486+ (might add padding)
- CFLAGS += $(call cc-option,-march=i486 -mtune=i386,)
- ifeq ($(CONFIG_STACK_OPTIMIZATION_386),y)
- # -mpreferred-stack-boundary=2 is essential in preventing gcc 4.2.x
- # from aligning stack to 16 bytes. (Which is gcc's way of supporting SSE).
- CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2,)
- endif
- # "Control how GCC aligns variables.
- # Supported values for type are compat uses increased alignment value
- # compatible uses GCC 4.8 and earlier, abi uses alignment value as specified by the psABI,
- # and cacheline uses increased alignment value to match the cache line size.
- # compat is the default."
- # "abi" seems to be somewhat successful in preventing oversealous data alignment.
- CFLAGS += $(call cc-option,-malign-data=abi,)
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