Enable support for Native POSIX Threads Library, the new threading module (requires linux-2.6 or better usually)
Name Category Description
gcc sys-devel The GNU Compiler Collection
gcc-apple sys-devel Apple branch of the GNU Compiler Collection, Developer Tools 4.0
glibc sys-libs GNU libc C library
gnat-gpl dev-lang GNAT Ada Compiler - GPL version
kgcc64 sys-devel 64bit kernel compiler
memcached net-misc High-performance, distributed memory object caching system
mesa media-libs OpenGL-like graphic library for Linux
mono dev-lang Mono runtime and class libraries, a C# compiler/interpreter
tigervnc net-misc Remote desktop viewer display system
xorg-server x11-base X.Org X servers

Thank you!