[dpdk-dev v2 1/2] build: add in option for qat use intel ipsec-mb lib

[Ji, Kai]

Hi Bruce,

We want user to have the ability to choice which lib they want to use, so the original design was to make the build option temporary, and it will get removed after ipsec-mb FIP certified.

Will look into the runtime option to avoid top level build option modification.

Regards

Kai 

> Looking at the patch a bit more, is there a reason why this cannot be made a run-
> time option when both libraries are available?