How can Autoconf help with the transition to stricter compilation defaults?

[Joseph Myers via cfe-commits]

On Fri, 11 Nov 2022, Zack Weinberg via Gcc wrote:

> These are also a trip hazard for novices, and the only way to turn them
> off is with -std=cXX, which also turns another trip hazard (trigraphs)
> *on*… so yeah, anything you can do to help speed up their removal, I
> think it’d be worthwhile.

As of GCC 13, -std=c2x will disable trigraphs, since they've been removed 
from C2x.

-- 
Joseph S. Myers
joseph at codesourcery.com