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-rw-r--r--clang/tools/clang-import-test/clang-import-test.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/clang/tools/clang-import-test/clang-import-test.cpp b/clang/tools/clang-import-test/clang-import-test.cpp
index 106f3d1d150..ff14f62574e 100644
--- a/clang/tools/clang-import-test/clang-import-test.cpp
+++ b/clang/tools/clang-import-test/clang-import-test.cpp
@@ -194,6 +194,8 @@ std::unique_ptr<CompilerInstance> BuildCompilerInstance() {
Inv->getLangOpts()->ThreadsafeStatics = false;
Inv->getLangOpts()->AccessControl = false;
Inv->getLangOpts()->DollarIdents = true;
+ // Needed for testing dynamic_cast.
+ Inv->getLangOpts()->RTTI = true;
Inv->getCodeGenOpts().setDebugInfo(codegenoptions::FullDebugInfo);
Inv->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
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