This is an auto-filed bug because sys-fs/jfsutils 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 642460 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Thomas Deutschmann <firstname.lastname@example.org>
AuthorDate: 2020-08-20 17:33:52 +0000
Commit: Thomas Deutschmann <email@example.com>
CommitDate: 2020-08-20 17:50:17 +0000
sys-fs/jfsutils: don't call AR directly
Signed-off-by: Thomas Deutschmann <firstname.lastname@example.org>
sys-fs/jfsutils/files/jfsutils-1.1.15-check-for-ar.patch | 10 ++++++++++
sys-fs/jfsutils/jfsutils-1.1.15-r1.ebuild | 9 ++++++++-
2 files changed, 18 insertions(+), 1 deletion(-)