To reproduce:
docker run pgpointcloud/pointcloud:latest
psql -U [ username ] -d [ database name ]
SELECT pc_lazperf_enabled();
The compiled library can be found at /usr/local/lib, and the header files at /usr/local/include/lazperf (although notably not las.hpp, which the configure script appears to be looking for).
There may be some confusion with the naming conventions lazperf versus laz-perf. Perhaps this changed at some point and broke the search paths.
Please advise!