Per the MSVC documentation the warning is new as of Visual Studio 2017, version 15.8. https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c5046?view=vs-2019 GTest users building on MSVC 2015 or older versions of 2017 will, when C4616 is enabled, see a warning like: [...]gtest-matchers.h(53): error C2220: warning treated as error - no 'object' file generated [...]gtest-matchers.h(53): warning C4619: #pragma warning: there is no warning number '5046' Guard the mention of 5046 by an _MSC_VER check. VS2017 15.8 corresponds to an _MSC_VER of 1915. https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=vs-2019
