Hi, > I want to call C function from fortran or call fortran function from C. I think you can get some insight from reading this, http://sysrun.haifa.il.ibm.com/hrl/greps2007/papers/greps-07-lto.pdf Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667