This is an auto-filed bug because x11-misc/vnc2swf 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 642732 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: David Seifert <email@example.com>
AuthorDate: 2020-07-04 13:54:33 +0000
Commit: David Seifert <firstname.lastname@example.org>
CommitDate: 2020-07-04 13:54:33 +0000
x11-misc/vnc2swf: Pass AR to build system
Package-Manager: Portage-2.3.103, Repoman-2.3.23
Signed-off-by: David Seifert <email@example.com>
.../vnc2swf/files/vnc2swf-0.5.0-respect-AR.patch | 45 ++++++++++++++++++++++
x11-misc/vnc2swf/vnc2swf-0.5.0-r1.ebuild | 9 +++++
2 files changed, 54 insertions(+)