Problem in creating a custom SOPC device driver

I agree with dsl. It doesn't mean you can't have a library. I've done libraries for a custom TSE driver and the lwIP TCP/IP stack. Create new projects that create LIB files and add the LIB files to your base project linker options. Multiple projects can then use the library which supports your SOPC component and the MAKE is faster as there is less code to scan. Note: I do not have my project configured to reference the LIB so MAKE won't scan it on every build, but I add the LIB as a required file for the linker. If I change a LIB (rarely), I right-click it and select 'Build'.