0xe2-0x9a-0x9b/Go-SDL — pull request #5 by alecthomas (2012-05-07 14:21:02+00:00)
Title: Remove dependency on librt on Darwin.

Darwin (or Lion, at least) with the latest version of Xcode, doesn't seem to have librt.

If the library is necessary in older versions, I'm not sure how you'd fix it with Go. IIUC it doesn't support any kind of fine-grained conditional compilation.