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-rw-r--r--lib/Sema/SemaDecl.cpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index e9922dfdf9..9429d4b413 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -220,11 +220,12 @@ TypedefDecl *Sema::MergeTypeDefDecl(TypedefDecl *New, ScopedDecl *OldD) {
DirectoryLookup::DirType OldDirType = HdrInfo.getFileDirFlavor(OldDeclFile);
DirectoryLookup::DirType NewDirType = HdrInfo.getFileDirFlavor(NewDeclFile);
- if ((OldDirType == DirectoryLookup::ExternCSystemHeaderDir ||
- NewDirType == DirectoryLookup::ExternCSystemHeaderDir) ||
+ // Allow reclarations in both SystemHeaderDir and ExternCSystemHeaderDir.
+ if ((OldDirType != DirectoryLookup::NormalHeaderDir ||
+ NewDirType != DirectoryLookup::NormalHeaderDir) ||
getLangOptions().Microsoft)
return New;
-
+
// TODO: CHECK FOR CONFLICTS, multiple decls with same name in one scope.
// TODO: This is totally simplistic. It should handle merging functions
// together etc, merging extern int X; int X; ...