This is an auto-filed bug because dev-embedded/powersoftplus-libftdi installs shared libraries that lack a SONAME. The issue was originally discovered on amd64, but it may be reproducible on other arches as well. If you think that a different summary clarifies the issue better, feel free to change it. Attached build log and emerge --info.
Created attachment 643190 [details] build.log build log and emerge --info
tinderbox_x86 has reproduced this issue with version 0.1.8-r1 - Updating summary.