In order for the x11vnc.desktop app to run, it needs tcl/tk, but it is not pulled in by the ebuild, and has to be installed manually.
sounds like a runtime dependency. I will add a postinst notice to bug 611662.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c421fb9e8c2826b925b3adc0d17b6f70a23c809c commit c421fb9e8c2826b925b3adc0d17b6f70a23c809c Author: Pacho Ramos <pacho@gentoo.org> AuthorDate: 2019-02-24 10:32:41 +0000 Commit: Pacho Ramos <pacho@gentoo.org> CommitDate: 2019-02-24 10:53:07 +0000 x11-misc/x11vnc: Fix dependencies and build issues Closes: https://bugs.gentoo.org/675596 Closes: https://bugs.gentoo.org/648898 Closes: https://bugs.gentoo.org/611088 Package-Manager: Portage-2.3.62, Repoman-2.3.12 Signed-off-by: Pacho Ramos <pacho@gentoo.org> x11-misc/x11vnc/files/x11vnc-0.9.16-crypto.patch | 23 ++++++++ x11-misc/x11vnc/metadata.xml | 6 ++ x11-misc/x11vnc/x11vnc-0.9.16-r1.ebuild | 75 ++++++++++++++++++++++++ 3 files changed, 104 insertions(+)