[kbuild-all] Re: [PATCH] compiler_attributes.h: Support no_sanitize_undefined check with GCC 4

UBSAN is supported since GCC 4.9, which unfortunately did not yet have __has_attribute(). To work around, the __GCC4_has_attribute workaround requires defining which compiler version supports the given attribute. In the case of no_sanitize_undefined, it is the first version that supports UBSAN, which is GCC 4.9. Reported-by: kernel test robot <lkp(a)intel.com&gt; Signed-off-by: Marco Elver <elver(a)google.com&gt; --- Doing a 'make W=1' with GCC 4.9 and the provided config fixes the build robot's report. Peter: Feel free to either squash this patch into the one adding __no_sanitize_undefined or apply on top.