When introducing LRO, Vlad has defined the macro RTE_ETHDEV_HAS_LRO_SUPPORT: http://dpdk.org/browse/dpdk/commit/lib/librte_ether/rte_ethdev.h?id=8eecb329
It allows to use the feature without version check (before the release or after a backport). Do you think it is useful? Should we define other macros RTE_[API]_HAS_[FEATURE] for each new feature or API change? It's time to fix it before releasing the 2.2 version.
