From 987e8b0cc4cc6a39ac0d4d32a47764f833c57a2e Mon Sep 17 00:00:00 2001
From: Lucas Alvares Gomes <lucasagomes@gmail.com>
Date: Fri, 31 Aug 2018 14:44:31 +0100
Subject: [PATCH] Fix devstack/lib/ovs to run with Fedora 28

The patch is fixing two problems found when stacking DevStack on a
Fedora 28 host OS.

Problem 1: Account to the different patch versions between the
kernel-devel and kernel-headers packages.

Problem 2: Install the elfutils-libelf-devel package which is needed to
compile OVS.

For more a detailed information about each problem, check the bug linked
in this patch.

Closes-Bug: #1790143
Change-Id: Idfdee28124ff19272abcaaa3adade0435e3e474a
---
 devstack/lib/ovs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/devstack/lib/ovs b/devstack/lib/ovs
index 7c3e7a7f14d..a82f1276986 100644
--- a/devstack/lib/ovs
+++ b/devstack/lib/ovs
@@ -53,7 +53,10 @@ function prepare_for_compilation {
 
     if is_fedora ; then
         # is_fedora covers Fedora, RHEL, CentOS, etc...
-        if [[ ${KERNEL_VERSION:0:2} != "3." ]]; then
+        if [[ "$os_VENDOR" == "Fedora" ]]; then
+            install_package elfutils-libelf-devel
+            KERNEL_VERSION=`echo $KERNEL_VERSION | cut --delimiter='-' --field 1`
+        elif [[ ${KERNEL_VERSION:0:2} != "3." ]]; then
             # dash is illegal character in rpm version so replace
             # them with underscore like it is done in the kernel
             # https://github.com/torvalds/linux/blob/master/scripts/package/mkspec#L25