This is an auto-filed bug because games-emulation/dgen-sdl calls ar directly.
The issue was originally discovered on amd64, 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 x86_64-pc-linux-gnu-ar and by removing the /usr/bin/ar binary.
Created attachment 640684 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: David Seifert <firstname.lastname@example.org>
AuthorDate: 2020-07-05 00:23:29 +0000
Commit: David Seifert <email@example.com>
CommitDate: 2020-07-05 00:23:29 +0000
games-emulation/dgen-sdl: Call AM_PROG_AR
Package-Manager: Portage-2.3.103, Repoman-2.3.23
Signed-off-by: David Seifert <firstname.lastname@example.org>
games-emulation/dgen-sdl/dgen-sdl-1.33-r1.ebuild | 29 ++++++++++++++--------
.../dgen-sdl/files/dgen-sdl-1.33-AM_PROG_AR.patch | 10 ++++++++
2 files changed, 29 insertions(+), 10 deletions(-)