1# CROSS_COMPILE_$(sm) is derived from CROSS_COMPILE/CROSS_COMPILE32/
2# CROSS_COMPILE64 and indicates the target that should be passed to clang. Path
3# components are ignored, as well as any command before the compiler name (for
4# instance "/some/path/ccache /other/path/arm-linux-gnueabihf-").
5# We try to extract any ccache command if present.
6clang-target	:= $(patsubst %-,%,$(notdir $(lastword $(CROSS_COMPILE_$(sm)))))
7ccache-cmd	:= $(if $(findstring ccache,$(CROSS_COMPILE_$(sm))),$(firstword $(CROSS_COMPILE_$(sm))) ,)
8
9CC$(sm)		:= $(ccache-cmd)clang --target=$(clang-target)
10CXX$(sm)	:= false # Untested yet
11# Due to the absence of clang-cpp in AOSP's prebuilt version of clang,
12# use the equivalent command of 'clang -E'
13CPP$(sm)	:= $(ccache-cmd)clang --target=$(clang-target) -E
14LD$(sm)		:= $(ccache-cmd)ld.lld
15
16AR$(sm)		:= $(ccache-cmd)llvm-ar
17NM$(sm)		:= llvm-nm
18OBJCOPY$(sm)	:= llvm-objcopy
19OBJDUMP$(sm)	:= llvm-objdump
20READELF$(sm)	:= llvm-readelf
21
22nostdinc$(sm)	:= -nostdinc -isystem $(shell $(CC$(sm)) \
23			-print-file-name=include 2> /dev/null)
24
25comp-cflags-warns-clang := -Wno-language-extension-token \
26			 -Wno-gnu-zero-variadic-macro-arguments
27
28# Note, use the compiler runtime library (libclang_rt.builtins.*.a) instead of
29# libgcc for clang
30libgcc$(sm)	:= $(shell $(CC$(sm)) $(CFLAGS$(arch-bits-$(sm))) \
31			-rtlib=compiler-rt -print-libgcc-file-name 2> /dev/null)
32
33# Core ASLR relies on the executable being ready to run from its preferred load
34# address, because some symbols are used before the MMU is enabled and the
35# relocations are applied.
36ldflag-apply-dynamic-relocs := --apply-dynamic-relocs
37
38# Define these to something to discover accidental use
39CC		:= false
40CXX		:= false
41CPP		:= false
42LD		:= false
43AR		:= false
44NM		:= false
45OBJCOPY		:= false
46OBJDUMP		:= false
47READELF		:= false
48nostdinc	:= --bad-nostdinc-variable
49libgcc  	:= --bad-libgcc-variable
50
51