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authorTom Rini <trini@konsulko.com>2016-03-16 19:55:55 -0400
committerTom Rini <trini@konsulko.com>2016-04-01 17:17:39 -0400
commitb745e82837e7c285fefdecfd580a343ecbd3baff (patch)
treed73d1618bf9d7e3c552fe8cb64715608e41ef80a /arch
parent40345e9ea74b0caef06f205364bb2cf93528cc40 (diff)
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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 <jeroen@myspectrum.nl> Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/Makefile3
-rw-r--r--arch/arm/config.mk6
2 files changed, 8 insertions, 1 deletions
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