message: COMP: fix implicit declarations
  /root/RTK/utilities/gengetopt/getopt.c:577:30: warning: implicit
  declaration of function 'strcmp' [-Wimplicit-function-declaration]
diff: @@ -12,8 +12,8 @@ STRING(REPLACE "-Wall" "-w" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  STRING(REPLACE "-Wall" "-w" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
  # MSVC specific issues
  -IF(MSVC)
  ADD_DEFINITIONS(-DHAVE_STRING_H)
  +IF(MSVC)
  ADD_DEFINITIONS(-DYY_NO_UNISTD_H)
  ADD_DEFINITIONS(-Disatty=!)
  ENDIF(MSVC)
  