This is an auto-filed bug because net-irc/iroffer-dinoex 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 641332 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Mikle Kolyada <firstname.lastname@example.org>
AuthorDate: 2020-05-24 09:30:50 +0000
Commit: Mikle Kolyada <email@example.com>
CommitDate: 2020-05-24 09:31:14 +0000
net-irc/iroffer-dinoex: respect CC
Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Mikle Kolyada <firstname.lastname@example.org>
net-irc/iroffer-dinoex/iroffer-dinoex-3.30-r1.ebuild | 3 ++-
net-irc/iroffer-dinoex/iroffer-dinoex-3.31.ebuild | 3 ++-
net-irc/iroffer-dinoex/iroffer-dinoex-3.32.ebuild | 5 +++--
3 files changed, 7 insertions(+), 4 deletions(-)