message: Fix MSVC warning D9025 ("overriding '/W3' with '/W4'")
  See
  This change was extracted from in order to isolate some of the changes.
diff: @@ -8,6 +8,9 @@ if(MSVC)
  set(WARNINGS_AS_ERRORS_FLAG "/WX")
  endif()
  + # https://stackoverflow.com/questions/58708772/cmake-project-in-visual-studio-gives-flag-override-warnings-command-line-warnin
  + string(REGEX REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  +
  #https://stackoverflow.com/questions/37527946/warning-unreferenced-inline-function-has-been-removed
  add_compile_options(/W4 ${WARNINGS_AS_ERRORS_FLAG} /wd5031 /wd4668 /wd4820 /wd4255 /wd4710 /analyze)
  elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
  