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arm: Add support for both floating point ABIs

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Add a Kconfig option to select between the Hard and Soft Float ABIs.  We
also default to the Hard Float ABI as this is what older SDK versions
supported.

JIRA: ZEP-555
Change-Id: I2180c98cd7556ab49f5ca9b46b31add2c11bd07b
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2016-06-29 14:42:09 -05:00 • committed by Inaky Perez-Gonzalez
commit 79606bccf0
2 changed files with 27 additions and 0 deletions
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5
arch/arm/Makefile
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@ -16,8 +16,13 @@ cflags-cortex-m4 = $(call cc-option,-mabi=aapcs -mthumb -mcpu=cortex-m4) \
$(call cc-option,-mthumb -march=armv7e-m)
ifeq ($(CONFIG_FLOAT), y)
ifeq ($(CONFIG_FP_SOFTABI), y)
cflags-cortex-m4 += $(call cc-option,-mfloat-abi=softfp -mfpu=fpv4-sp-d16)
endif
ifeq ($(CONFIG_FP_HARDABI), y)
cflags-cortex-m4 += $(call cc-option,-mfloat-abi=hard -mfpu=fpv4-sp-d16)
endif
endif
cflags-cortex-m7 = $(call cc-option,-mabi=aapcs -mthumb -mcpu=cortex-m7) \
$(call cc-option,-mthumb -march=armv7e-m)