Solaris userland utility library for Linux

 This library provides a variety of glue functions for ZFS on Linux:
  * libspl: The Solaris Porting Layer userland library, which provides APIs
    that make it possible to run Solaris user code in a Linux environment
    with relatively minimal modification.
  * libavl: The Adelson-Velskii Landis balanced binary tree manipulation
    library.
  * libefi: The Extensible Firmware Interface library for GUID disk
    partitioning.
  * libshare: NFS, SMB, and iSCSI service integration for ZFS.