Qt4 is dead and going away. There is no sign of upstream porting to Qt5 and the last release is from 2011. Maybe we'll have to drop the option.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c8849b8d8ee3b0f1ba02fb47681f1a4f72a4106f commit c8849b8d8ee3b0f1ba02fb47681f1a4f72a4106f Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2018-03-03 16:09:07 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2018-03-03 17:44:08 +0000 sci-biology/amos: Drop old Closes: https://bugs.gentoo.org/645140 Package-Manager: Portage-2.3.24, Repoman-2.3.6 sci-biology/amos/amos-3.1.0-r3.ebuild | 53 ----------------------------------- 1 file changed, 53 deletions(-) Additionally, it has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=86acc7ebf1e4ce5be9437507bed6e607a3bcfe6c commit 86acc7ebf1e4ce5be9437507bed6e607a3bcfe6c Author: Andreas Sturmlechner <asturm@gentoo.org> AuthorDate: 2018-03-03 16:08:26 +0000 Commit: Andreas Sturmlechner <asturm@gentoo.org> CommitDate: 2018-03-03 17:44:08 +0000 sci-biology/amos: Drop USE=qt4 Bug: https://bugs.gentoo.org/645140 Package-Manager: Portage-2.3.24, Repoman-2.3.6 sci-biology/amos/amos-3.1.0-r4.ebuild | 52 +++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+)}