[build2] build2 staging GCC 11 compiler warnings

[Matthew Krupcale]

On Tue, Jan 26, 2021 at 8:35 AM Boris Kolpackov <boris at codesynthesis.com> wrote:
> That's unfortunate. Am I understanding correctly from your logs that
> this warning is enabled with just -Wall?

It looks like -Wfree-nonheap-object is enabled by default actually[1].

[1] https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html