configure searches for fltk-config, and if found, enables fltk support. I think pinentry needs a fltk USE-flag with correct dependency and configure handling, or fltk support needs to be disabled unconditionally. Thanks!
See also https://bugs.gentoo.org/653938 where for cross-compile the same thing is requested, but it doesn't add a dependency for USE=fltk. (https://bugs.gentoo.org/attachment.cgi?id=528442&action=diff)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=199d422073087221672c976e3774bb265ea3bcab commit 199d422073087221672c976e3774bb265ea3bcab Author: Kristian Fiskerstrand <k_f@gentoo.org> AuthorDate: 2018-05-12 15:53:26 +0000 Commit: Kristian Fiskerstrand <k_f@gentoo.org> CommitDate: 2018-05-12 15:53:38 +0000 app-crypt/pinentry: Remove automagic dependency for fltk Closes: https://bugs.gentoo.org/655290 Package-Manager: Portage-2.3.24, Repoman-2.3.6 app-crypt/pinentry/pinentry-1.1.0-r2.ebuild | 102 ++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+)