[dpdk-stable] [PATCH] devtools: fix example build with old pkg-config

[Bruce Richardson]

On Fri, Nov 15, 2019 at 10:35:25AM +0000, Ferruh Yigit wrote:
> The old version of the pkg-config [1] doesn't support '-define-prefix'
> and '--path' arguments which is causing failure building the
> examples [2].
> 

Yes for the define-prefix option, no for the path one.

The define-prefix argument is indeed necessary to have a properly working
pkg-config to get cflags/ldflags in this case, so we need to skip the tests
without it. However, the path parameter is only used to properly track the
dependencies of the build to enable rebuilding if the pkg-config file
itself changes. Therefore, having no output from pkg-config --path won't
cause the build to fail, so it's more an optional flag.

/Bruce