Please see #152139 also I have added usb and cups as USE flags since these were missing. I have made some changes to the ebuild also: - Only use libusb when usb is in USE flag - Only do cups install and other related stuff when cups is in USE flag I have attached the new ebuild and the diff, so it's easier to see.
Created attachment 104042 [details] The ebuild
*** Bug 158139 has been marked as a duplicate of this bug. ***
Created attachment 104043 [details] The diff
Sorry about #158139 click-duplicate. My browser went into christmas mode :-)
Comment on attachment 104043 [details] The diff This is a no-go... http://www.gentoo.org/proj/en/qa/automagic.xml
And, the libusb support is not optional at all. <snip> AC_CHECK_LIB([usb], [usb_init],, [AC_MSG_ERROR([cannot find libusb support], 2)]) </snip>