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Move compiler optimization to the SoC

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Decisions on compiler optimizations were done on the architecture level,
this does not scale and some SoCs will have different optimization levels
or compiler options needed. Moving this to the SoC makes it easy to optimize
differently when using the same CPU which we use to set the right optimization
now on the architecture level.

For IAMCU platforms, use the right architecture and tuning.

-march=lakemont -mtune=lakemont -miamcu -msoft-float

Change-Id: I0f77cffe7a139f8b2620935094437d0dfd160dfe
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2016-01-13 07:49:42 -05:00
commit b43af743b7
11 changed files with 43 additions and 17 deletions
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10
arch/arm/Makefile
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@ -1,14 +1,10 @@
KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) $(call cc-option,-fdata-sections,)
arch-$(CONFIG_CPU_CORTEX_M3) += $(call cc-option,-mthumb -mcpu=cortex-m3) \
$(call cc-option,-mthumb -march=armv7-m)
arch-$(CONFIG_CPU_CORTEX_M4) += $(call cc-option,-mthumb -mcpu=cortex-m4) \
$(call cc-option,-mthumb -march=armv7e-m)
include $(srctree)/arch/$(ARCH)/soc/$(SOC_NAME)/Makefile
cflags-$(CONFIG_LTO) = $(call cc-option,-flto,)
cflags-$(CONFIG_LTO) += $(call cc-option,-flto,)
KBUILD_CFLAGS += $(cflags-y) $(arch-y)
KBUILD_AFLAGS += $(arch-y)
KBUILD_CFLAGS += $(cflags-y)
QEMU_CPU_TYPE_arm = cortex-m3
QEMU_FLAGS_arm = -cpu $(QEMU_CPU_TYPE_arm) \