Static linking with clew

[foundry-milan]

There is some strange code in clew.h:

// #define CLEW_STATIC

#ifdef _WIN32
  #ifdef clew_STATIC
  #  define CLEWAPI extern
  #else
  #  ifdef clew_EXPORTS
#pragma message("exporting")
  #    define CLEWAPI extern __declspec(dllexport)
  #  else
#pragma message("importing")
  #    define CLEWAPI extern __declspec(dllimport)
  #  endif
  #endif
#else
#  define CLEWAPI extern
#endif

1. clew_STATIC is a strange combination of lower and upper case letters.
2. If producing static lib is the default, clew should have CLEW_DYNAMIC which should NOT be defined by default. There should be a note saying that CLEW_DYNAMIC needs to be defined (or uncommented) for .dll builds.