I just built both 32& 64 bit DMD. The 32 bit works fine, but the 64 bit not.I always get this: /usr/bin/ld: skipping incompatible /home/anta40/Digital-Mars/dmd-dev/lib64/libphobos2.a when searching for -lphobos2
Did you compile druntime for 64 bit, too? As libphobos2.a is just an archive file, you're able to extract it and check if all containing objs are 64 bit. have a look at the linux "file" command.