[Bug preprocessor/98021] #warning issues redundant diagnostic lines

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98021

--- Comment #5 from Andreas Schwab <sch...@linux-m68k.org> ---
> For '#warning "xxx"' they're the same

That is not true.  There can be comments.