Update CMakeLists.txt

Author: flexferrum

CMakeLists.txt

@@ -30,13 +30,13 @@ if (${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" OR ${CMAKE_CXX_COMPILER_ID} MATCHES
 else ()
     # MSVC
     if (NOT DEFINED MSVC_RUNTIME_TYPE)
-        if (CMAKE_BUILD_TYPE MATCHES "Debug")
-            set (MSVC_RUNTIME_TYPE "/MDd")
-        else ()
-            set (MSVC_RUNTIME_TYPE "/MD")
-        endif ()
+        set (MSVC_RUNTIME_TYPE "/MD")
+    endif ()
+    if (CMAKE_BUILD_TYPE MATCHES "Debug")
+        set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${MSVC_RUNTIME_TYPE}d")
+    else ()
+        set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${MSVC_RUNTIME_TYPE}")
     endif ()
-    set (CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE} "${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}} ${MSVC_RUNTIME_TYPE}")
 endif()
 
 if("${GTEST_ROOT}" STREQUAL "" AND WITH_TESTS)