Add a note that points to the linkage specifier for the C++ linkage errors

This commit improves the "must have C++ linkage" error diagnostics that are
emitted for C++ declarations like templates and literal operators by adding an
additional note that points to the appropriate extern "C" linkage specifier.

rdar://19021120

Differential Revision: https://reviews.llvm.org/D26189

llvm-svn: 285823

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 1813aa0b648..e20ae1a0151 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -15341,7 +15341,7 @@ static void checkModuleImportContext(Sema &S, Module *M,
   } else if (!M->IsExternC && ExternCLoc.isValid()) {
     S.Diag(ImportLoc, diag::ext_module_import_in_extern_c)
       << M->getFullModuleName();
-    S.Diag(ExternCLoc, diag::note_module_import_in_extern_c);
+    S.Diag(ExternCLoc, diag::note_extern_c_begins_here);
   }
 }