Check whether binary was compiled for 64 bit

linse@zebrano ~/release/RNAforester-1.5 $ file /vol/rnaforester2/bin/RNAforester
/vol/rnaforester2/bin/RNAforester: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), not stripped, uses CMOV SSE SSE2