llvm: support older toolchains

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+.

(From OE-Core rev: 0e7d761b1360f603a4cc0de15c67f4e182e5a6a4)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-devtools/llvm/llvm_git.bb b/meta/recipes-devtools/llvm/llvm_git.bb
index 01a7da8ebd..7832441482 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"