libkml-dev 1.3.0-8build1 (amd64 binary) in ubuntu focal

 This is a library for use with applications that want to parse,
 generate and operate on KML, a geo-data XML variant. It is an
 implementation of the OGC KML 2.2 standard. It is written in C++ and
 bindings are available via SWIG to Java and Python.
 .
 This package contains files required to build C/C++ programs which use
 the KML library.