From b745e82837e7c285fefdecfd580a343ecbd3baff Mon Sep 17 00:00:00 2001 From: Tom Rini Date: Wed, 16 Mar 2016 19:55:55 -0400 Subject: arm: clang: Update support slightly - Move most of the flags required into LLVM_RELFLAGS to test at build time instead of requiring them to be passed in. - Update doc/README.clang to reflect this - Switch to rpi_2 as the example as it's closer to working out of the box than rpi is. Cc: Jeroen Hofstee Signed-off-by: Tom Rini --- arch/arm/Makefile | 3 ++- arch/arm/config.mk | 6 ++++++ 2 files changed, 8 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/arm/Makefile b/arch/arm/Makefile index ce006ae..09ba027 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -16,7 +16,8 @@ arch-$(CONFIG_CPU_SA1100) =-march=armv4 arch-$(CONFIG_CPU_PXA) = arch-$(CONFIG_CPU_ARM1136) =-march=armv5 arch-$(CONFIG_CPU_ARM1176) =-march=armv5t -arch-$(CONFIG_CPU_V7) =$(call cc-option, -march=armv7-a, -march=armv5) +arch-$(CONFIG_CPU_V7) =$(call cc-option, -march=armv7-a, \ + $(call cc-option, -march=armv7, -march=armv5)) arch-$(CONFIG_ARM64) =-march=armv8-a # Evaluate arch cc-option calls now diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 9af6c37..9a5a974 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -19,6 +19,12 @@ PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections \ PLATFORM_RELFLAGS += $(call cc-option, -msoft-float) \ $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) +# LLVM support +LLVMS_RELFLAGS := $(call cc-option,-mllvm,) \ + $(call cc-option,-target arm-none-eabi,) \ + $(call cc-option,-arm-use-movt=0,) +PLATFORM_RELFLAGS += $(LLVM_RELFLAGS) + PLATFORM_CPPFLAGS += -D__ARM__ # Choose between ARM/Thumb instruction sets -- cgit v1.1