Hi,

CMAKE_CXX_STANDARD does not work with older cmake versions (not sure which one, but 2.4 does not support it); therefore, it builds with C++ < 11 and fails (e.g. "nullptr").

If version is less than 3.1, CXX flags should be set explicitly:

if (CMAKE_VERSION VERSION_LESS "3.1")
    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
    endif ()
  else ()
    set (CMAKE_CXX_STANDARD 11)
  endif ()

Regards
Eugenio