gcc64: gcc64 (Base GCC package with C support for sparc64) gcc64: gcc64: GCC is the GNU Compiler Collection. gcc64: gcc64: This package contains those parts of the compiler collection needed gcc64: to compile C code for 64 bits. You'll want this to be able to build gcc64: kernels on UltraSparc machines. Right now it's not going to be much gcc64: good for anything else, as there are no 64bit libraries built. gcc64: gcc64: gcc64: