On Fri, Jan 18, 2013 at 10:19 PM, horseriver <horserivers@xxxxxxxxx> wrote: > hi: > > Here are two command for producting one .so file : > > 1. gcc -nostdlib -Wl,-T,vsyscall.lds vsyscall-int80.o -o vsyscall-int80.so > > 2. ld -T vsyscall.lds vsyscall-int80.o -o vsyscall-int80.so There is no substantive difference between these commands. There are various minor differences that probably don't matter. Use the -v option when invoking gcc to see precisely how it invokes the linker. In particular, invoking the linker via the gcc driver will cause some C++-specific operations to occur when needed, but since you aren't using C++ in this case they won't happen. Ian