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-rw-r--r--include/clang/Basic/Builtins.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/clang/Basic/Builtins.h b/include/clang/Basic/Builtins.h
index f770c5089e..5711fc1eb4 100644
--- a/include/clang/Basic/Builtins.h
+++ b/include/clang/Basic/Builtins.h
@@ -17,6 +17,10 @@
#include <cstring>
+// VC++ defines 'alloca' as an object-like macro, which interferes with our
+// builtins.
+#undef alloca
+
namespace llvm {
template <typename T> class SmallVectorImpl;
}