But you are not using this because you want to use the Yocto-built Qt5 libraries with LTIB-built image? Or the project requirements are to use the old kernel and old compiler? If the former, then built the whole platform image with Yocto together with Qt5. If latter then you need to build-in the Qt5 dependencies into this platform image using LTIB, would be my guess. But you need to ask someone who knows how to use LTIB.