[Bug c/85678] -fno-common should be default

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85678

--- Comment #17 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to David Brown from comment #15)
> This has been implemented in gcc 10, and -fno-common is now the default. 
> This "bug" can presumably now be closed.
> 
> Many thanks to the gcc developers here.

Done in r10-4867-g6271dd984d7f92.