[PATCH 01/21] Add --enable-fortify-source option

[Joseph Myers]

On Tue, 20 Jun 2023, Frédéric Bérat via Libc-alpha wrote:

> It is now possible to enable fortification.
> The level may be given as parameter, if none is provided, the configure
> script will determine what is the highest level possible that can be set
> considering GCC built-ins availability and set it.
> If level is explicitly set to 3, configure checks if the compiler
> supports the built-in function necessary for it or raise an error if it
> isn't.

A new configure option should be documented in manual/install.texi with 
INSTALL regenerated, and should be mentioned in NEWS as well.

-- 
Joseph S. Myers
joseph@codesourcery.com