Hi,
There's a bug in released Boost 1.62 that affects Digikam. The build
complains about not finding a function degree().
In the hopes of saving someone else time and frustration, the solution is this
patch to boost:
https://github.com/boostorg/graph/commit/387bcb3d72c1646dfa0acc25ab7a444bd0ed05f0
Regards,
-Steve