[OE-core] [PATCH] llvm: support older toolchains

[Ross Burton]

LLVM is now warning if your host compiler is gcc <5.1, and some of our supported
operating systems still only have 4.8.5.  Set
LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN so those builds continue to work, hopefully
we retire the old operating systems before LLVM requires 5.1+.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/recipes-devtools/llvm/llvm_git.bb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/recipes-devtools/llvm/llvm_git.bb b/meta/recipes-devtools/llvm/llvm_git.bb
index 01a7da8ebdc..7832441482e 100644
--- a/meta/recipes-devtools/llvm/llvm_git.bb
+++ b/meta/recipes-devtools/llvm/llvm_git.bb
@@ -70,6 +70,7 @@ EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
                   -DFFI_INCLUDE_DIR=$(pkg-config --variable=includedir libffi) \
                   -DLLVM_OPTIMIZED_TABLEGEN=ON \
                   -DLLVM_TARGETS_TO_BUILD='${LLVM_TARGETS}' \
+                  -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON \
                   -DPYTHON_EXECUTABLE=${HOSTTOOLS_DIR}/python2 \
                   -G Ninja"
 
-- 
2.11.0