This is an auto-filled bug because media-gfx/transfig calls cc 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 CC implementation (like clang) by setting the CC variable. So this issue has been reproduced by setting the CC variable to aarch64-unknown-linux-gnu-gcc and by removing the /usr/bin/cc - /usr/bin/gcc binaries.
Created attachment 635842 [details]
build log and emerge --info
The bug has been closed via the following commit(s):
Author: Stephan Hartmann <email@example.com>
AuthorDate: 2020-10-12 17:27:23 +0000
Commit: Stephan Hartmann <firstname.lastname@example.org>
CommitDate: 2020-10-12 17:27:23 +0000
media-gfx/transfig: EAPI 7, respect CC/AR/RANLIB
Package-Manager: Portage-3.0.4, Repoman-3.0.1
Signed-off-by: Stephan Hartmann <email@example.com>
media-gfx/transfig/Manifest | 2 +-
.../transfig/files/transfig-3.2.5e-clang.patch | 12 ++++++
media-gfx/transfig/transfig-3.2.5e.ebuild | 50 ++++++++++++++--------
3 files changed, 45 insertions(+), 19 deletions(-)