libqhull.so is deprecated and not installed since Qhull 2020.2. We
should use libqhullstatic.a because we use qhull_a.h (non-reentrant
version). We should use libqhull_r.so once we change to use
qhull_ra.h (reentrant version) from qhull_a.h.
They do not produce deprecated libraries: libqhull.so, qhull.dll,
libqhull_p.so, and qhull_p.dll. Users of these libraries should
convert their code to reentrant Qhull (libqhull_r.so) or link to
libqhullstatic.a.
libqhull.so is deprecated and not installed since Qhull 2020.2. We should use libqhullstatic.a because we use qhull_a.h (non-reentrant version). We should use libqhull_r.so once we change to use qhull_ra.h (reentrant version) from qhull_a.h.
From http://www.qhull.org/news/qhull-news.html :