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clang: Update documentation

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As of clang-5.0, things have changed a bit.  First, we cannot
automatically guess -target values as if we do not pass one with CC then
cc-option will fail.  Second, to disable movt/movw relocations the
argument has become -mno-movt.

Related to the target part, we cannot use arm-none-eabi as that ends up
being too generic of an ARM target for things like say rpi_3_32b to
work.

Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini
2018-04-22 19:15:03 -04:00
parent 4760fe26c7
commit 3b6407b8ed
2 changed files with 9 additions and 14 deletions
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5
arch/arm/config.mk
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@@ -23,9 +23,8 @@ 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,)
LLVM_RELFLAGS := $(call cc-option,-mllvm,) \
$(call cc-option,-mno-movt,)
PLATFORM_RELFLAGS += $(LLVM_RELFLAGS)
PLATFORM_CPPFLAGS += -D__ARM__