commit d172f2bb9e6e530039df3a001b9ce3eb76dc4a75
Author: Andrew Beekhof <andrew@beekhof.net>
Date:   Mon Oct 27 10:28:51 2014 +1100

    Correctly enable /proc/pid validation in sbd_lock_running()

diff --git a/configure.ac b/configure.ac
index ec7fced..540fd57 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,9 +78,17 @@ DISK=0
 if test "x${enable_shared_disk}" != xno ; then
    DISK=1
 fi
+
 AC_DEFINE_UNQUOTED(SUPPORT_SHARED_DISK, $DISK, Turn on functionality that requires shared disk)
 AM_CONDITIONAL(SUPPORT_SHARED_DISK, test "$DISK" = "1")
 
+if
+	test -e /proc/$$
+then
+	echo "/proc/{pid} is supported" 
+	AC_DEFINE_UNQUOTED(HAVE_PROC_PID, 1, Define to 1 if /proc/{pid} is supported.)
+fi
+
 dnl **********************************************************************
 dnl Check for various argv[] replacing functions on various OSs
 dnl