[PATCH] build: detect backtrace availability

[Thomas Monjalon]

09/01/2023 10:08, Bruce Richardson:
> On Sun, Jan 08, 2023 at 10:59:20AM +0100, Thomas Monjalon wrote:
> > Backtrace dump is available:
> > 	- always on Windows
> > 	- on Linux/BSD if execinfo.h is available (not anymore on Alpine)
> > 
> > The flag RTE_BACKTRACE was set unconditionnaly in rte_config.h.
> > It is now set only if the feature is available.
> > 
> > Note: Alpine Linux has decided to remove libexecinfo support,
> > so this change will allow to compile DPDK on recent Alpine Linux.
> > 
> > Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> 
> Acked-by: Bruce Richardson <bruce.richardson at intel.com>

Applied