--- gforth/configure.in	2008/08/19 18:57:19	1.242
+++ gforth/configure.in	2008/08/19 20:18:58	1.244
@@ -617,7 +617,6 @@ else
  M4=m4
 fi
 AC_SUBST(M4)
-AC_DEFINE_UNQUOTED(M4,"$M4",[How to invoke m4])
 AC_MSG_RESULT($M4)
 
 # Find installed Gforth
@@ -666,6 +665,9 @@ case "$host_os" in
 		DIRSEP="/"
 		PATHSEP=":"
 		DEFAULTSYSTEMPREFIX=""
+                #the following magic value was suggested by
+                #http://mail.python.org/pipermail/pythonmac-sig/2005-October/015190.html
+                AC_DEFINE_UNQUOTED(MACOSX_DEPLOYMENT_TARGET,"10.3",[an environment variable value needed by libtool on some MacOS X versions])
 		;;
 	*)
 		DIRSEP="/"