Any chance of compiling ROS 2 from sources now

edit

I had problems compiling the latest release, solved (not really - see the update) by switching to the latest master, but the latter brought other problems, purpotedly caused by some machine-generated code:

$ colcon build --symlink-install
...
Starting >>> rosidl_generator_cpp                                                                                           
Finished <<< class_loader [2.10s]                                                                                                                         
Starting >>> rosidl_typesupport_introspection_c
--- stderr: rosidl_generator_cpp                                                                                                                           
/home/art/ros2_ws/build/rosidl_generator_cpp/rosidl_generator_c/rosidl_generator_cpp/msg/string_arrays__functions.c: In function ‘rosidl_generator_cpp__msg__StringArrays__init’:
/home/art/ros2_ws/build/rosidl_generator_cpp/rosidl_generator_c/rosidl_generator_cpp/msg/string_arrays__functions.c:52:47: error: incompatible types when assigning to type ‘rosidl_generator_c__String {aka struct rosidl_generator_c__String}’ from type ‘char *’
   msg->def_string_dynamic_array_value.data[0] = "What";
                                               ^
...

I wonder, how can I compile ROS 2 now from sources? I would need one which works with the RTI Connext DDS.

================== UPDATE

This is a parallel build, sometimes the same error shows as with release-latest.