message: Debug CMAKE_CXX_COMPILER_ID and PERFORMANCE_CXX_OPTIONS
diff: @@ -37,6 +37,9 @@ elseif (${CMAKE_CXX_COMPILER_ID} MATCHES "MSVC")
  "/Ob2")
  endif()
  +message(WARNING CMAKE_CXX_COMPILER_ID=${CMAKE_CXX_COMPILER_ID})
  +message(WARNING PERFORMANCE_CXX_OPTIONS=${PERFORMANCE_CXX_OPTIONS})
  +
  add_mfem_miniapp(performance_ex1
  MAIN ex1.cpp
  LIBRARIES mfem
  