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-rw-r--r--clang/lib/Sema/SemaDeclCXX.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 031edf1515b..0fae8c86d1b 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -4633,6 +4633,12 @@ static void checkDLLAttribute(Sema &S, CXXRecordDecl *Class) {
if (!ClassAttr)
return;
+ if (!Class->isExternallyVisible()) {
+ S.Diag(Class->getLocation(), diag::err_attribute_dll_not_extern)
+ << Class << ClassAttr;
+ return;
+ }
+
if (S.Context.getTargetInfo().getCXXABI().isMicrosoft() &&
!ClassAttr->isInherited()) {
// Diagnose dll attributes on members of class with dll attribute.
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