Mupen64Plus is a plugin-based N64 emulator for Linux which is capable
of accurately playing many games. Included are four MIPS R4300 CPU
emulators, with dynamic recompilers for 32-bit x86 and 64-bit amd64
systems, and necessary plugins for audio, graphical rendering (RDP),
signal co-processor (RSP), and input.

By default the gtk2 GUI will be built. To build the Qt4 GUI pass GTK2=no
to the script.

libsamplerate is an optional (but recommended) dependency.
It is also available from SlackBuilds.org