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>
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 += $(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