distinguishing gcc compilation valgrind false positives

[Jakub Jelinek]

On Wed, Nov 24, 2021 at 12:31:53PM -0700, Jeff Law via Gcc wrote:
> Agreed.  Work from the assumption it's a real GCC issue until proven
> otherwise.
> 
> I believe GCC has annotations to help valgrind that are turned on by a magic
> configuration option as well.

True, but Zdenek has them turned on based on the posted configure options.
That is the --enable-valgrind-annotations in there...

	Jakub