[Bug c/79677] Weird handling of -Werror=

[orion at cora dot nwra.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79677

--- Comment #10 from Orion Poplawski <orion at cora dot nwra.com> ---
I'm not sure how I'm practically supposed to handle this.  In this case, for
one sub-directory upstream adds -Wno-format to the flags:

./Utilities/KWIML/test/CMakeLists.txt:    set(CMAKE_${lang}_FLAGS
"${CMAKE_${lang}_FLAGS} -Wno-format")

Is this still a bug in gcc?