AM_PROG_LIBTOOL is obsolete in libtool 1.3.3, which we now require.

Using AC_PROG_LIBTOOL instead.

Author: stigsb

configure.in.in

@@ -77,7 +77,7 @@ dnl   test -n "$GCC" || CFLAGS="-Ae $CFLAGS -D_HPUX_SOURCE"
 dnl fi
 
 dnl Checks for programs.
-AM_PROG_LIBTOOL
+AC_PROG_LIBTOOL
 AM_SET_LIBTOOL_VARIABLE([--silent])
 AC_PROG_YACC
 if test "$YACC" != "bison -y"; then