DRP_ENABLE_DOWNLOADING doesn't work well if BOOST_ROOT already exists in the environment

[konskarm]

OS: Windows 10

When building libnest2d with the -DRP_ENABLE_DOWNLOADING=ON tag, if the BOOST_ROOT is set in the environment, CMake identifies it and does not download and build boost itself. As a result, when using libnest2d (in this case through pynest2d) libnest2d complains that it cannot find boost/geometry.hpp because it looks for the boost headers in its dependencies (libnest2d\build\dependencies), where CMake downloaded Clipper & NLopt but skipped boost.

The workaround of course is to temporarily set BOOST_ROOT in the cmd where this is being built, but it is not ideal since if you already have boost it will try to download and build it again.

Would it be possible to modify the build process to properly look in the BOOST_ROOT if it already exists in the environment?

[tamasmeszaros]

Might be fixed now. Please report if the issue persists.