Fix the broken logger, cleanup macros, fix warnings

[JaeseungYeom]

• Fix the broken logger
  • Flux logger
  • Add directory hint for cpp-logger search in cmake
• cleanup macros
  • more structuring
  • noop handling
  • multiline expansion
• fix warnings
  • with clang, gcc, intel for c99, c11, c17, c++11, c++17