On 64bit systems, if you want to be able to compile 32bit and 64bit binaries
| Package | Local Description (use.local.desc) | Metadata Description (metadata.xml) |
|---|---|---|
| dev-debug/rr | - | - |
| media-gfx/nvidia-cg-toolkit | - | - |
| net-voip/mumble | - | - |
| sys-libs/glibc | - | - |
| sys-libs/libstdc++-v3 | - | - |