Comment 3 for bug 1637946

My problem is kind-of going away when using a build-snap with classic confinement (which causes automatic rpath injection at build-time of the build-snap). rpath injection seems to do a decent enough job at solving at least the pulse issue I've encountered.

That said perhaps the answer to the usr/local/lib is also rpaths. I imagine there isn't much that can be done other than rpathing or setting C*FLAGS with appropriate -L flags. gcc/ld would have build-time-set default paths for where libs generally go, unfortunately there is no way to force an additional "root" path into that list.