cc1: warning: unrecognized command line option "-Wno-narrowing"

[Paolo Carlini]

Hi,

> I saw it on a native build, possibly netbsd, but I ignored it as I was
> in the middle of something.  Will keep an eye out for it again.

I believe that the core issue is pretty clear: -Wno-narrowing disables a C++ only warning but somehow we are passing it also in a few C compiler invocations, thus the driver warns. We could suppress such warnings too ;) or special case those files?

Paolo