checking for cups/cups.h... yes checking for usb_init in -lusb... no configure: error: cannot find libusb support
Created attachment 308729 [details] emerge--info.txt
Created attachment 308731 [details] hplilp-3.11.10-build.log
Created attachment 308733 [details] config.log
This was fixed in bug #402727. The fix however went into the newer versions >3.12.2-r1 and I did not have the time to backport it to the older versions.
I opened a stabilization request for hplip 3.12.4 in bug #414161 and Tomáš Chvátal (scarabeus@gentoo.org) already stabilized for amd64, x86 and ppc. So I will close this one for now