Sun Studio 12: C++ User's Guide

2.4.4 Compiling for SPARC V9

The compilation, linking, and execution of 64-bit objects is supported only in a V9 SPARC, Solaris 8 operating system with a 64-bit kernel running. Compilation for 64-bits is indicated by the –xarch=v9, –xarch=v9a, and -xarch=v9b options.