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-rw-r--r--clang/lib/Driver/MSVCToolChain.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/clang/lib/Driver/MSVCToolChain.cpp b/clang/lib/Driver/MSVCToolChain.cpp
index b822b7d57ce..d6bd5c31ae6 100644
--- a/clang/lib/Driver/MSVCToolChain.cpp
+++ b/clang/lib/Driver/MSVCToolChain.cpp
@@ -31,7 +31,9 @@
#ifdef USE_WIN32
#define WIN32_LEAN_AND_MEAN
#define NOGDI
- #define NOMINMAX
+ #ifndef NOMINMAX
+ #define NOMINMAX
+ #endif
#include <windows.h>
#endif
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