Comment 2 for bug 1640663

What is the OVS version been used? Because most of the time this Error is seen on non-compatible versions.
Let me know what exactly you are trying to compile so that i can quickly check on my repository or build a new checkout code with the Ubuntu 14.04 version for your specific scenario.
| Open vSwitch | Linux kernel
|:------------:|:-------------:
| 1.4.x | 2.6.18 to 3.2
| 1.5.x | 2.6.18 to 3.2
| 1.6.x | 2.6.18 to 3.2
| 1.7.x | 2.6.18 to 3.3
| 1.8.x | 2.6.18 to 3.4
| 1.9.x | 2.6.18 to 3.8
| 1.10.x | 2.6.18 to 3.8
| 1.11.x | 2.6.18 to 3.8
| 2.0.x | 2.6.32 to 3.10
| 2.1.x | 2.6.32 to 3.11
| 2.3.x | 2.6.32 to 3.14
| 2.4.x | 2.6.32 to 4.0
| 2.5.x | 2.6.32 to 4.3
| 2.6.x | 3.10 to 4.7