Umm, Ok lets try to be a bit more basic.
Which server achitecture are you runnnig SPARC or X86 Which Solaris version is it ? ( uname -a should tell you ) Which compilers are installed ? /opt/SUNWspro/bin/cc ? /usr/sfw/bin/gcc ? is /usr/bin/cc symliked to somewhere ? ls -l /usr/bin/cc should tell you For Sun studio compilers the options -xtarget CPUtype and -xarch SIMD_type governs wheter 32 or 64 bit architecture is used there are many possible combinations of -xtarget -xarch. For GCC -mpcu CPUTYPE -march CPUTYPE does the same job. This message posted from opensolaris.org