https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
--- Comment #11 from Pádraig Brady <P at draigBrady dot com> ---
I agree that -Wno-... should never be promoted to an error as we see with:
$ echo 'int maint(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror
-Wextra -Wno-error=return-type -
<stdin>: In function ‘maint’:
<stdin>:1:1: warning: control reaches end of non-void function [-Wreturn-type]
<stdin>: At top level:
cc1: error: unrecognized command line option ‘-Wno-unknown-warning-option’
[-Werror]
cc1: all warnings being treated as errors
However it's worth noting that one can suppress the other warnings entirely
that trigger the promotion. This may be ok as a workaround for some:
$ echo 'int maint(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror
-Wextra -Wno-return-type -
