This is an auto-filled bug because games-board/gnugo calls ar directly.
The issue was originally discovered on arm64, but it may be reproducible on other arches as well.
If you think that a different summary clarifies the issue better, feel free to change it.
Attached build log and emerge --info.
If you think it doesn't make sense fix these type of issues, I'd like to point out that won't be possible use a different AR implementation (like llvm-ar) by setting the AR variable. So this issue has been reproduced by setting the AR variable to aarch64-unknown-linux-gnu-ar and by removing the /usr/bin/ar binary.
Created attachment 635814 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: David Seifert <firstname.lastname@example.org>
AuthorDate: 2020-06-23 12:11:11 +0000
Commit: David Seifert <email@example.com>
CommitDate: 2020-06-23 12:11:11 +0000
games-board/gnugo: [QA] Call AM_PROG_AR
Package-Manager: Portage-2.3.101, Repoman-2.3.22
Signed-off-by: David Seifert <firstname.lastname@example.org>
games-board/gnugo/files/gnugo-3.9.1-autotools.patch | 10 ++++++++++
games-board/gnugo/gnugo-3.9.1-r2.ebuild | 16 ++++++++++++----
2 files changed, 22 insertions(+), 4 deletions(-)