Index: llvm/trunk/cmake/platforms/WinMsvc.cmake
===================================================================
--- llvm/trunk/cmake/platforms/WinMsvc.cmake
+++ llvm/trunk/cmake/platforms/WinMsvc.cmake
@@ -164,6 +164,7 @@
 
 set(COMPILE_FLAGS
     -D_CRT_SECURE_NO_WARNINGS
+    -fms-compatibility-version=19.11
     -imsvc "${MSVC_INCLUDE}"
     -imsvc "${WINSDK_INCLUDE}/ucrt"
     -imsvc "${WINSDK_INCLUDE}/shared"