Installing libLAS using OSGeo4W - liblas.org
This document describes how to install libLAS and its related using OSGeo4W. OSGeo4W is a collection of Windows packages that uses the Cygwin installer to manage package dependencies. libLAS in its fully-featured form requires a number of dependencies, and these are all available via the OSGeo4W installer. Obtain the OSGeo4W Installer.
https://liblas.org/osgeo4w.html