# CROSS_COMPILE_$(sm) is derived from CROSS_COMPILE/CROSS_COMPILE32/
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# CROSS_COMPILE64 and indicates the target that should be passed to clang. Path
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# components are ignored, as well as any command before the compiler name (for
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# instance "/some/path/ccache /other/path/arm-linux-gnueabihf-").
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# We try to extract any ccache command if present.
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clang-target := $(patsubst %-,%,$(notdir $(lastword $(CROSS_COMPILE_$(sm)))))
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ccache-cmd := $(if $(findstring ccache,$(CROSS_COMPILE_$(sm))),$(firstword $(CROSS_COMPILE_$(sm))) ,)
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CC$(sm) := $(ccache-cmd)clang --target=$(clang-target)
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CXX$(sm) := false # Untested yet
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# Due to the absence of clang-cpp in AOSP's prebuilt version of clang,
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# use the equivalent command of 'clang -E'
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CPP$(sm) := $(ccache-cmd)clang --target=$(clang-target) -E
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LD$(sm) := $(ccache-cmd)ld.lld
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AR$(sm) := $(ccache-cmd)llvm-ar
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NM$(sm) := llvm-nm
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OBJCOPY$(sm) := llvm-objcopy
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OBJDUMP$(sm) := llvm-objdump
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READELF$(sm) := llvm-readelf
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nostdinc$(sm) := -nostdinc -isystem $(shell $(CC$(sm)) \
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-print-file-name=include 2> /dev/null)
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comp-cflags-warns-clang := -Wno-language-extension-token \
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-Wno-gnu-zero-variadic-macro-arguments
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# Note, use the compiler runtime library (libclang_rt.builtins.*.a) instead of
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# libgcc for clang
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libgcc$(sm) := $(shell $(CC$(sm)) $(CFLAGS$(arch-bits-$(sm))) \
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-rtlib=compiler-rt -print-libgcc-file-name 2> /dev/null)
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# Core ASLR relies on the executable being ready to run from its preferred load
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# address, because some symbols are used before the MMU is enabled and the
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# relocations are applied.
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ldflag-apply-dynamic-relocs := --apply-dynamic-relocs
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# Define these to something to discover accidental use
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CC := false
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CXX := false
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CPP := false
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LD := false
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AR := false
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NM := false
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OBJCOPY := false
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OBJDUMP := false
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READELF := false
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nostdinc := --bad-nostdinc-variable
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libgcc := --bad-libgcc-variable
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