Tweaks to fix autoconf-related portability issues and autogen.sh reliability

autogen.sh

@@ -6,8 +6,14 @@
 #
 set -x
 
-aclocal -I config
+if [ ! -d m4 ]; then
+	mkdir m4
+fi
+if [ ! -d config ]; then
+	mkdir config
+fi
 libtoolize --automake --copy --force
+aclocal -I config
 autoheader
 automake --add-missing --copy
 autoconf

configure.ac

@@ -21,7 +21,7 @@ AC_CONFIG_AUX_DIR(config)
 
 AC_CANONICAL_TARGET
 
-AM_INIT_AUTOMAKE([tar-ustar -Wall foreign])
+AM_INIT_AUTOMAKE
 
 dnl AM_MAINTAINER_MODE