- The correct way to build with thumb mode is to select SYS_THUMB_BUILD - We should be setting -march=armv7-m in arch/arm/Makefile not the sub-config.mk file.
Signed-off-by: Tom Rini trini@konsulko.com --- arch/arm/Kconfig | 1 + arch/arm/Makefile | 1 + arch/arm/cpu/armv7m/config.mk | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2bbb86c462dd..efc9108a5a3a 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -221,6 +221,7 @@ config CPU_V7M select THUMB2_KERNEL select SYS_CACHE_SHIFT_5 select SYS_ARM_MPU + select SYS_THUMB_BUILD
config CPU_V7R bool diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 3b1dd85716de..913d23048f1f 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -16,6 +16,7 @@ arch-$(CONFIG_CPU_ARM1136) =-march=armv5 arch-$(CONFIG_CPU_ARM1176) =-march=armv5t arch-$(CONFIG_CPU_V7A) =$(call cc-option, -march=armv7-a, \ $(call cc-option, -march=armv7, -march=armv5)) +arch-$(CONFIG_CPU_V7M) =-march=armv7-m arch-$(CONFIG_CPU_V7R) =-march=armv7-r arch-$(CONFIG_ARM64) =-march=armv8-a
diff --git a/arch/arm/cpu/armv7m/config.mk b/arch/arm/cpu/armv7m/config.mk index 4e46df5a2844..f50964cfb92e 100644 --- a/arch/arm/cpu/armv7m/config.mk +++ b/arch/arm/cpu/armv7m/config.mk @@ -3,4 +3,4 @@ # (C) Copyright 2015 # Kamil Lulko, kamil.lulko@gmail.com
-PLATFORM_CPPFLAGS += -march=armv7-m -mthumb -mno-unaligned-access +PLATFORM_CPPFLAGS += -mno-unaligned-access