vchoi_fork

[svn-r5072] Purpose:
    Bug fix
Description:
    Old config assume compiler is the SGI compiler if it is not gcc.
    It would apply all SGI cc options to the $CFLAGS.  This would cause
    problem if a non-cc non-gcc compiler is used.
Solution:
    Verify the compiler is indeed the SGI compiler before applying all those
    cc specific options to the $CFLAGS.
Platforms tested:
    modi4, both parallel serial, gcc or cc, -64 or n32.