https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86134
--- Comment #10 from joseph at codesourcery dot com <joseph at codesourcery dot
com> ---
On Fri, 15 Jun 2018, rguenth at gcc dot gnu.org wrote:
> Joseph, do you agree that the following shouldn't fail the compilation?
>
> > echo 'int main(){}' | gcc -S -x c -Wno-unknown-warning-option -Wall -Werror
> > -Wno-error=return-type -
> <stdin>: In function ‘main’:
> <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
Yes.
