Get Sun Studio - C, C++, & Fortran compilers and Tools v12u1 (March 2010) or higher:
pkg install developer/sunstudio12u1 (from IPS DEV, SS 12.1.1)
Note: Sun Studio 12.2 is now available. Recommend Sun Studio 12.1.1 or Sun Studio 12.2.
Get GCC 3.4.3:
pkg install developer/gcc-3
Get CBE 1.8.0 from:
http://dlc.sun.com/osol/jds/downloads/cbe/test/desktop-cbe-mini-1.8.0.tar.bz2