diff options
| -rw-r--r-- | lib/Lex/PPDirectives.cpp | 2 | ||||
| -rw-r--r-- | test/Preprocessor/warn-macro-unused.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/lib/Lex/PPDirectives.cpp b/lib/Lex/PPDirectives.cpp index f74aad3c81..efa188f752 100644 --- a/lib/Lex/PPDirectives.cpp +++ b/lib/Lex/PPDirectives.cpp @@ -1594,7 +1594,7 @@ void Preprocessor::HandleUndefDirective(Token &UndefTok) { // If the macro is not defined, this is a noop undef, just return. if (MI == 0) return; - if (!MI->isUsed()) + if (!MI->isUsed() && MI->isWarnIfUnused()) Diag(MI->getDefinitionLoc(), diag::pp_macro_not_used); // If the callbacks want to know, tell them about the macro #undef. diff --git a/test/Preprocessor/warn-macro-unused.c b/test/Preprocessor/warn-macro-unused.c index 8a6d7c25ca..c33aeb5df9 100644 --- a/test/Preprocessor/warn-macro-unused.c +++ b/test/Preprocessor/warn-macro-unused.c @@ -1,5 +1,10 @@ // RUN: %clang_cc1 %s -Wunused-macros -Dfoo -Dfoo -verify +#include "warn-macro-unused.h" + #define unused // expected-warning {{macro is not used}} #define unused unused + +// rdar://9745065 +#undef unused_from_header // no warning |