@crispyoz : https://codescape.mips.com/sdk/v2.0.0k/docs/_static/gpl_3.1.txt is detailing about "GCC RUNTIME LIBRARY EXCEPTION" which I understand if correctly, permits using compiler and run-time, while not requiring the source of the work to be made available as in the case of a pure GPL approach ? As you have correctly pointed-out, using other GPLed libraries from other sources will require that GPL be strictly followed, unless specified otherwise in those libs. Thanks ..