See tracker bug.
The version says: 1.5.25.15 Isn't that ancient? The current version is 2.9.0
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=9fadc7d8ea7625749b9e53729ee33a477db4068e commit 9fadc7d8ea7625749b9e53729ee33a477db4068e Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2018-11-25 15:24:07 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2018-11-25 15:24:07 +0000 dev-libs/cygwin: drop prepstrip(), bug #587290 This disables all stripping in cygwin. As PMS does not provide an alternative just drop stripping for now. Reported-by: Michał Górny Closes: https://bugs.gentoo.org/587290 Package-Manager: Portage-2.3.52, Repoman-2.3.12 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> dev-libs/cygwin/cygwin-1.5.25.15.ebuild | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)