This is an auto-filled bug because app-editors/vis calls cc 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 CC implementation (like clang) by setting the CC variable. So this issue has been reproduced by setting the CC variable to x86_64-pc-linux-gnu-gcc and by removing the /usr/bin/cc - /usr/bin/gcc binaries.
Created attachment 637422 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Haelwenn (lanodan) Monnier <email@example.com>
AuthorDate: 2020-06-06 16:35:37 +0000
Commit: Joonas Niilola <firstname.lastname@example.org>
CommitDate: 2020-06-06 16:36:06 +0000
app-editors/vis: Respect CC and CFLAGS in tests
Signed-off-by: Haelwenn (lanodan) Monnier <email@example.com>
Signed-off-by: Joonas Niilola <firstname.lastname@example.org>
app-editors/vis/vis-0.5.ebuild | 3 +++
1 file changed, 3 insertions(+)