libdeflate is a library for fast, whole-buffer DEFLATE-based
compression and decompression.

The supported formats are:
    DEFLATE (raw)
    zlib (a.k.a. DEFLATE with a zlib wrapper)
    gzip (a.k.a. DEFLATE with a gzip wrapper)

libdeflate is heavily optimized. It is significantly faster than the
zlib library, both for compression and decompression, and especially
on x86 and ARM processors. In addition, libdeflate provides optional
high compression modes that provide a better compression ratio than
the zlib's "level 9".

As well as installing a shared library, the cmake recipe installs a
static library (libdeflate.a) which is usually not kept in the final
package. If it is required to be kept in the final package, run the
SlackBuild with the environment variable KEEP_STATIC_LIB=yes e.g.
    KEEP_STATIC_LIB=yes bash libdeflate.SlackBuild