travis: Check compilation with DPDK experimental API.

Add Travis jobs to check compilation with DPDK experimental API enabled.
This will help us catch issues for the day we need one of them.

Note: this should not be merged to master, intended for dpdk-latest
branch only.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>

.travis.yml

@@ -44,6 +44,7 @@ env:
   - KERNEL_LIST="4.15 4.14 4.9  4.4  3.19 3.16"
   - AFXDP=1 KERNEL=5.3
   - M32=1 OPTS="--disable-ssl"
+  - DPDK=1 DPDK_EXPERIMENTAL=1
   - DPDK=1 OPTS="--enable-shared"
   - DPDK_SHARED=1
   - DPDK_SHARED=1 OPTS="--enable-shared"
@@ -56,6 +57,9 @@ matrix:
     - arch: arm64
       compiler: gcc
       env: TESTSUITE=1 DPDK=1
+    - arch: arm64
+      compiler: gcc
+      env: DPDK=1 DPDK_EXPERIMENTAL=1
     - arch: arm64
       compiler: gcc
       env: KERNEL_LIST="5.5 4.19"

.travis/linux-build.sh

@@ -173,6 +173,9 @@ if [ "$DPDK" ] || [ "$DPDK_SHARED" ]; then
         # Disregard cast alignment errors until DPDK is fixed
         CFLAGS_FOR_OVS="${CFLAGS_FOR_OVS} -Wno-cast-align"
     fi
+    if [ -n "$DPDK_EXPERIMENTAL" ]; then
+        CFLAGS_FOR_OVS="${CFLAGS_FOR_OVS} -DALLOW_EXPERIMENTAL_API"
+    fi
 fi
 
 if [ "$CC" = "clang" ]; then