X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=m4%2Fopenvswitch.m4;h=c5f0742016f0f5aad9b31b0b0587cf10bdc8cfcb;hb=7fa710e43fdf2dbf7fe41877cf73e04ccc4a7166;hp=5d77ca24b4296373d59fb8fe6ea098b09659b86d;hpb=f272ec7373a11a5917c9f3aca56969a48eec2f96;p=openvswitch

diff --git a/m4/openvswitch.m4 b/m4/openvswitch.m4
index 5d77ca24..c5f07420 100644
--- a/m4/openvswitch.m4
+++ b/m4/openvswitch.m4
@@ -198,7 +198,7 @@ AC_DEFUN([OVS_CHECK_DOT],
     [for dot],
     [ovs_cv_dot],
     [dnl "dot" writes -V output to stderr:
-     if (dot -V) 2>&1 | grep '^dot - [gG]raphviz version' >/dev/null 2>&1; then
+     if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
        ovs_cv_dot=yes
      else
        ovs_cv_dot=no