# Check that people use the good file
if(NOT TOP_CMAKE_WAS_SOURCED)
message(FATAL_ERROR "
You did not 'cmake' the good CMakeLists.txt file. Use the one in the top dir.
It is advice to delete all wrongly generated cmake stuff => CMakeFiles & CMakeCache.txt")
endif(NOT TOP_CMAKE_WAS_SOURCED)
### 3rd party was dropped