[cmake] Fix error message on simulated VS version check

For clang-cl self hosts in VS2015 environment this was reporting: "Host
Clang must have at least -fms-compatibility-version=19.00.24213.1, your
version is 9.0.0".

This check fires as CMake detects the simulated environment as _MSC_VER
1900, which is truncated. This makes it less than the required
19.00.24213.1.

Differential revision: https://reviews.llvm.org/D61188

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359556 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/modules/CheckCompilerVersion.cmake b/cmake/modules/CheckCompilerVersion.cmake
index 125a9537e617af25731e3ae1815914e6e0f97deb..1ee7832c482575819ee12adeb680a53591935306 100644 (file)
--- a/cmake/modules/CheckCompilerVersion.cmake
+++ b/cmake/modules/CheckCompilerVersion.cmake
@@ -50,7 +50,7 @@ check_compiler_version("MSVC" "Visual Studio" ${MSVC_MIN} ${MSVC_SOFT_ERROR})
 if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   if (CMAKE_CXX_SIMULATE_ID MATCHES "MSVC")
     if (CMAKE_CXX_SIMULATE_VERSION VERSION_LESS MSVC_MIN)
-      message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=${MSVC_MIN}, your version is ${CMAKE_CXX_COMPILER_VERSION}.")
+      message(FATAL_ERROR "Host Clang must have at least -fms-compatibility-version=${MSVC_MIN}, your version is ${CMAKE_CXX_SIMULATE_VERSION}.")
     endif()
     set(CLANG_CL 1)
   elseif(NOT LLVM_ENABLE_LIBCXX)