[RFC 3/8] eal: add macro to disable shadow warnings

[Bruce Richardson]

On Wed, Aug 27, 2025 at 04:14:06PM -0700, Stephen Hemminger wrote:
> When using constructs like:
> 	RTE_MIN(x, RTE_MIN(y, z))
> the compiler would generate warnings about overlapping definitions
> of the variables in the macro. This is safe so add pragma support
> to silence the problem.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>