--- libprelude-0.9.12.2.old/Makefile.am	2006-12-15 10:49:01.000000000 +0100
+++ libprelude-0.9.12.2/Makefile.am	2007-02-07 19:00:14.000000000 +0100
@@ -1,7 +1,10 @@
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
 
 ACLOCAL_AMFLAGS = -I m4 -I libmissing/m4
-SUBDIRS = libltdl libmissing m4 src prelude-adduser bindings docs
+SUBDIRS = libmissing m4 src prelude-adduser bindings docs
+if NEED_LIBTOOL_DL
+SUBDIRS += libltdl
+endif
 
 EXTRA_DIST = HACKING.README LICENSE.README client.conf global.conf idmef-client.conf tls.conf
 
--- libprelude-0.9.12.2.old/configure.in	2007-01-08 13:51:42.000000000 +0100
+++ libprelude-0.9.12.2/configure.in	2007-02-07 18:59:05.000000000 +0100
@@ -52,8 +52,14 @@
 
 
 dnl setup libltdl
+AC_CHECK_LIB([ltdl], [lt_dlopen], libtool_dl=no, libtool_dl=yes, [-L/usr/local/lib])
+if test x$libtool_dl = xyes; then
+    AC_CONFIG_SUBDIRS(libltdl)
+else
+    AC_CHECK_HEADERS(ltdl.h,,AC_MSG_ERROR([*** ltdl library is present but headers are missing]))
+fi
+AM_CONDITIONAL(NEED_LIBTOOL_DL, test x$libtool_dl = xyes)
 
-AC_CONFIG_SUBDIRS(libltdl)
 AC_LIBTOOL_DLOPEN
 AC_LTDL_DLLIB
 AC_LIBLTDL_CONVENIENCE
@@ -710,3 +716,5 @@
 echo "    - Generate documentation : $enable_gtk_doc"
 echo "    - Perl binding           : $with_perl"
 echo "    - Python binding         : $with_python"
+echo "    - Libtool dl             : $libtool_dl"
+