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[Bug c/52635] gcc fails to diagnose invalid type in unused sizeof() when optimizing
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 20 Mar 2012 18:06:33 +0000
- Subject: [Bug c/52635] gcc fails to diagnose invalid type in unused sizeof() when optimizing
- Auto-submitted: auto-generated
- References: <bug-52635-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52635
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-20 18:06:33 UTC ---
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.