Update prerequisite Autoconf version to 2.60 (from 2.59).

We use the MKDIR_P variable that only Autoconf 2.60 and
later supports, but we were only requiring Autoconf 2.59
or later.  This fixes the problem.

Also, we were not explicitly invoking AC_PROG_MKDIR_P from
configure.ac, even though we were using $(MKDIR_P).  Some
other macro must have been internally invoking
AC_PROG_MKDIR_P, but it's not good to depend on that, so
this commit adds an explicit call to it.

diff --git a/configure.ac b/configure.ac
index ca0be47..708b1fe 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -30,7 +30,7 @@
 # advertising or publicity pertaining to the Software or any
 # derivatives without specific, written prior permission.
 
-AC_PREREQ(2.59)
+AC_PREREQ(2.60)
 AC_INIT(openflow, 0.8.9~1, info@openflowswitch.org)
 NX_BUILDNR
 AC_CONFIG_SRCDIR([README.hwtables])
@@ -43,6 +43,7 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CPP
 AC_PROG_RANLIB
+AC_PROG_MKDIR_P
 
 AC_ARG_VAR([PERL], [path to Perl interpreter])
 AC_PATH_PROG([PERL], perl, no)