This is an auto-filed bug because dev-vcs/rsvndump 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 640452 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Sebastian Pipping <firstname.lastname@example.org>
AuthorDate: 2020-05-21 00:00:40 +0000
Commit: Sebastian Pipping <email@example.com>
CommitDate: 2020-05-21 00:01:20 +0000
dev-vcs/rsvndump: Support AR variable and AsciiDoc 9
Signed-off-by: Sebastian Pipping <firstname.lastname@example.org>
Package-Manager: Portage-2.3.99, Repoman-2.3.22
.../rsvndump/files/rsvndump-0.6-asciidoc-9.patch | 35 +++++++++++++++++++
.../rsvndump/files/rsvndump-0.6-configure-ar.patch | 24 +++++++++++++
dev-vcs/rsvndump/rsvndump-0.6-r1.ebuild | 39 ++++++++++++++++++++++
3 files changed, 98 insertions(+)