I've successfully compiled media-sound/jack-audio-connection-kit-0.100.0 & (-r1) on AMD64. There is no problem in the build process and there are no problems running it on my system, so mayxbe the keyword ~amd64 would be better that -amd64 ! Reproducible: Always Steps to Reproduce: 1. emerge =media-sound/jack-audio-connection-kit-0.100.0-r1 2. 3.
yes it works keyword added Thanks for the report