message: Ruy: Disable x86 enhancements under Clang < 8.
diff: @@ -88,7 +88,8 @@ limitations under the License.
  // The Android NDK logic excludes earlier and very broken versions of intrinsics
  // headers.
  #if defined(RUY_FORCE_ENABLE_X86_ENHANCEMENTS) || \
  - (defined(__clang__) && defined(__linux__) && !defined(__EMSCRIPTEN__) && \
  + (defined(__clang__) && (__clang_major__ >= 8) && defined(__linux__) && \
  + !defined(__EMSCRIPTEN__) && \
  (!defined(__ANDROID_NDK__) || \
  (defined(__NDK_MAJOR__) && (__NDK_MAJOR__ >= 20))))
  #define RUY_DONOTUSEDIRECTLY_X86_ENHANCEMENTS 1
  