ld: i386:x86-64 architecture of input file `/usr/lib/crtn.o' is incompatible with i386
Ok, so we have a mix of 32 bit and 64 bit binaries. Can you tell us a little more about your project, e.g. can you confirm that you trying to build a 32 bit binary on a 64bit machine? Have you used that compiler before? If you write a hello world OpenMP program, does it work?
Good luck, Entenbein.