cmake update

CMakeLists.txt

-# cmake options:
-#
-#       -DCMAKE_INSTALL_PREFIX=/path/to/install
-
-cmake_minimum_required( VERSION 3.2 FATAL_ERROR )
+cmake_minimum_required( VERSION 3.30 FATAL_ERROR )
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
@@ -63,7 +59,7 @@ message(STATUS ${wordexp_flag} ": "  ${${wordexp_flag}})
 message(STATUS ${config_flag} ": "  ${${config_flag}})
 message(STATUS ${netcdf_flag} ": "  ${netCDF_FOUND})
 
-add_subdirectory( libcdi )
+add_subdirectory( libcdi/src )
 add_subdirectory( src/lib/yac )
 add_subdirectory( src/lib/gradsdes )
 add_subdirectory( src/lib/healpix )