SDL Library Documentation. The SDL library is designed to make it easy to write games that run on Linux, *BSD, MacOS, Win32 and BeOS using the various native high-performance media interfaces, (for video, audio, etc) and presenting a single source-code level API to your application. SDL is a fairly low level API, but using it, completely portable applications can be written with a great deal of flexibility.-SDL Library Documentation. The SDL librar y is designed to make it easy to write games that r un on Linux, * BSD, MacOS, Win32 and BeOS using the various native high - pe rformance media interfaces, and (for video, audio, etc) and presenting a single source-code level API to your application. SDL is a fairly low Leve l API, but using it, completely portable applications can be writt en with a great deal of flexibility.