After having issues with running sys-power/apcupsd-3.12.4, I read through the testing section of the manual [1] and this is what it says: "Please note that if you are running a pthreaded version of apcupsd, which you should be since the non-pthreaded version is no longer supported, (installed from rpm or --enable-pthreads on the ./configure line), [...]" This would eliminate the need for the threads USE flag. It compiles and runs fine. [1]http://www.apcupsd.com/manual/Testing_Apcupsd.html#SECTION000143000000000000000 Reproducible: Always
As for version 3.14.0 it's not possible now to build apcupsd without pthreads, so use flag "threads" do nothing. I think it should be removed from ebuild.
threads use flag was removed from latest versions of apcupsd, so this bug should be close imho.
Closing as the option is no longer available.