I have a chroot I used to build binary packages (and generally clean the build-deps up after I do updates) When trying to compile digikam, it failed and the build.log said it was because it needs Boost graph headers. It should be added as a DEPEND (no RDEPEND) so that it can build properly from scratch. For the interim I manually installed boost to get digikam to get it to compile. Reproducible: Always
Try the patch in Bug 399727 and report whether it helps / resolves
Created attachment 300323 [details] Ebuild patch for digikam-2.4.1 to DEPEND boost
Created attachment 300325 [details] same thing for 2.3.0
Created attachment 300327 [details] and one for 2.5.0
No, Bug 399727 fixes compilation against newer boost versions, but this problem is that it doesn't pull it in as a dependency when building (needs Boost headers). I've included ebuild patches for all versions in the current tree.
Fixed, thanks!