This is an auto-filled bug because dev-util/strace 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 635736 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Mike Gilbert <email@example.com>
AuthorDate: 2020-05-02 20:31:15 +0000
Commit: Mike Gilbert <firstname.lastname@example.org>
CommitDate: 2020-05-02 20:31:15 +0000
dev-util/strace: respect AR variable
Signed-off-by: Mike Gilbert <email@example.com>
dev-util/strace/files/strace-5.6-AR.patch | 27 +++++++++++++++++++++++++++
dev-util/strace/strace-5.6.ebuild | 3 ++-
2 files changed, 29 insertions(+), 1 deletion(-)