http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52635
--- Comment #5 from Mikael Pettersson <mikpe at it dot uu.se> 2012-03-20 19:09:01 UTC --- (In reply to comment #4) > Not sure what kernel you are looking at, but in current kernel at least since > 2009-09 BUILD_BUG_ON is BUILD_BUG_ON_ZERO and only MAYBE_BUILD_BUG_ON macro is > using this sizeof and from the description it sounds like it wants the > warnings > only if the condition is known to be false already during parsing. I'm looking at the 3.3 kernel released only a few days ago. It's kernel.h doesn't define BUILD_BUG_ON in terms of BUILD_BUG_ON_ZERO (which perhaps it should be) and there is no MAYBE_BUILD_BUG_ON anywhere.
