compatility with ancient (cooley) autotools

configure.ac

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ([2.67])
+AC_PREREQ([2.63])
 AC_INIT([margo], [0.1], [],[],[]) 
-AC_CONFIG_MACRO_DIRS([m4])
+AC_CONFIG_MACRO_DIR([m4])
 LT_INIT
 
 AC_CANONICAL_TARGET
@@ -23,7 +23,6 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CXX
 AC_PROG_CXXCPP
-AC_PROG_RANLIB
 
 AC_PROG_MKDIR_P