acinclude: fix issue when configuring with --with-dpdk
authorMauricio Vasquez B <mauricio.vasquezbernal@studenti.polito.it>
Wed, 1 Jun 2016 16:48:07 +0000 (18:48 +0200)
committerBen Pfaff <blp@ovn.org>
Wed, 1 Jun 2016 17:28:28 +0000 (10:28 -0700)
commit4c16ee484e2f3c7888ec33e8260f868605568027
treec854e1798358fce8197b10aef03ba2904f8a9b64
parent7d8eadce4df70f563a0c0123c612f6117c8ff864
acinclude: fix issue when configuring with --with-dpdk

when an empty path is given to the --with-dpdk option
(--with-dpdk="" or --width-dpdk=$NON_SET_ENV_VARIABLE) the configure
script does not show any error and configures OvS without DPDK support,
this can create some confusion.

This patch modifies that behavior showing an explicity error in that case.

Signed-off-by: Mauricio Vasquez B <mauricio.vasquezbernal@studenti.polito.it>
Signed-off-by: Ben Pfaff <blp@ovn.org>
acinclude.m4