clang-native: Add class to use clang as native compiler

Some recipes demand full clang/llvm builds e.g. chromium we need to use
clang as native toolchain. This class collects all needed bits to enable
OE built clang to provide the clang native toolchain

Setting

TOOLCHAIN_NATIVE = "clang"

in recipe will chose clang for native toolchain

(From OE-Core rev: 43ba5ed17e069b13cd43c36650524a0113c81955)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/meta/classes/toolchain/clang-native.bbclass b/meta/classes/toolchain/clang-native.bbclass
new file mode 100644
index 0000000000..4de491a1cb
--- /dev/null
+++ b/meta/classes/toolchain/clang-native.bbclass
@@ -0,0 +1,18 @@
+BUILD_CC = "${CCACHE}${BUILD_PREFIX}clang ${BUILD_CC_ARCH}"
+BUILD_CXX = "${CCACHE}${BUILD_PREFIX}clang++ ${BUILD_CC_ARCH}"
+BUILD_FC = "${BUILD_PREFIX}gfortran ${BUILD_CC_ARCH}"
+BUILD_CPP = "${BUILD_PREFIX}clang ${BUILD_CC_ARCH} -E"
+BUILD_LD = "${BUILD_PREFIX}ld ${BUILD_LD_ARCH}"
+BUILD_CCLD = "${BUILD_PREFIX}clang ${BUILD_CC_ARCH}"
+BUILD_AR = "${BUILD_PREFIX}llvm-ar"
+BUILD_AS = "${BUILD_PREFIX}as ${BUILD_AS_ARCH}"
+BUILD_RANLIB = "${BUILD_PREFIX}llvm-ranlib -D"
+BUILD_STRIP = "${BUILD_PREFIX}llvm-strip"
+BUILD_OBJCOPY = "${BUILD_PREFIX}llvm-objcopy"
+BUILD_OBJDUMP = "${BUILD_PREFIX}llvm-objdump"
+BUILD_NM = "${BUILD_PREFIX}llvm-nm"
+BUILD_READELF = "${BUILD_PREFIX}llvm-readelf"
+
+DEPENDS += "clang-native libcxx-native compiler-rt-native"
+
+LDFLAGS += " --rtlib=libgcc --unwindlib=libgcc"