"Zhao Li,SCNB R&D NC(BJ)" <zhaoli@xxxxxxxxxxx> writes: > Still want to ask, do GCC have special compile or link flags > (additionally, plus the cooperation of programming) to make it > linked library be used by CC linked program? No. Your only hope is to write an extern "C" interface for the library, if possible, and compile it with Sun CC. Then you can call those routines from code compiled by gcc. Ian