message: Force intergen to use c++11
diff: @@ -5,7 +5,8 @@ include(ExternalProject)
  set(intergen_SOURCES "${CMAKE_CURRENT_LIST_DIR}/intergen")
  set(intergen_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/intergen")
  set(intergen_INSTALL_DIR "${CMAKE_CURRENT_BINARY_DIR}/intergen")
  -set(intergen_CMAKE_ARGS -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER} -DCMAKE_INSTALL_PREFIX=${intergen_INSTALL_DIR})
  +set(intergen_CMAKE_ARGS -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER} -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER} -DCMAKE_INSTALL_PREFIX=${intergen_INSTALL_DIR} -DCMAKE_CXX_FLAGS="-std=gnu++0x")
  +
  ExternalProject_Add(intergen
  SOURCE_DIR ${intergen_SOURCES}
  