Improve -Wheader-hygiene to warn about using directives inside linkage

specifications within the global scope, from Elliot Glaysher.

llvm-svn: 128352

1 files changed, 18 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/warn-using-namespace-in-header.cpp b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
index 393e097df59..e040ca74cbf 100644
--- a/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
+++ b/clang/test/SemaCXX/warn-using-namespace-in-header.cpp
@@ -7,3 +7,21 @@ using namespace dont_warn;
 
 // Warning is actually in the header but only the cpp file gets scanned.
 // expected-warning {{using namespace directive in global context in header}}
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+// Warn inside linkage specs too.
+// expected-warning {{using namespace directive in global context in header}}
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+// expected-warning {{using namespace directive in global context in header}}