From 9a6156bb8e8e4ae61d7a167f3a2337270e68f119 Mon Sep 17 00:00:00 2001
From: Andy Zhou <azhou@nicira.com>
Date: Thu, 16 Apr 2015 12:52:09 -0700
Subject: autoconf: check for linux/perf_event.h

Older Linux prior to version 2.6.32 do not support user mode
performance events, They also don't have 'linux/perf_event.h' header
file. Add check for those older Linux to conditionally compile
perf-counter.c

Reported-by: Alex Wang <alexw@nicira.com>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 8d47eb9c8..d1b48ca35 100644
--- a/configure.ac
+++ b/configure.ac
@@ -111,6 +111,7 @@ OVS_CHECK_PKIDIR
 OVS_CHECK_RUNDIR
 OVS_CHECK_DBDIR
 OVS_CHECK_BACKTRACE
+OVS_CHECK_PERF_EVENT
 OVS_CHECK_VALGRIND
 OVS_CHECK_SOCKET_LIBS
 OVS_CHECK_XENSERVER_VERSION
-- 
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