From b195dfecfdcf19c5edf0c90272b9052918662d8a Mon Sep 17 00:00:00 2001
From: Michael D Toguchi <michael.d.toguchi@intel.com>
Date: Thu, 22 Jul 2021 09:31:27 -0700
Subject: [PATCH] [Driver] Fix default MSVC version setting for
 -fms-compatibilty-version

The input for -fms-compatibilty-version is expected to be of format:
Major[.Minor[.Micro[.Build]]]
Minor can only be 2 digits, Micro can only be 5, and 'build' is ignored.
---
 clang/lib/Driver/ToolChains/Clang.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index df01fe9c93c5e..e3a1a405565ba 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -4639,7 +4639,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
                                              MSVT.getAsString()));
       else {
         const char *LowestMSVCSupported =
-            "191025017"; // VS2017 v15.0 (initial release)
+            "19.10.25017"; // VS2017 v15.0 (initial release)
         CmdArgs.push_back(Args.MakeArgString(
             Twine("-fms-compatibility-version=") + LowestMSVCSupported));
       }