diff --git a/configure b/configure
index ea71fc40..186c31f2 100755
--- a/configure
+++ b/configure
@@ -2699,7 +2699,68 @@ if test -z "$NOSSL"; then
 fi
 
 if test "$MODULES" = "yes"; then
-	echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
+	if test -n "$ISSUN"; then
+		echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
+echo $ECHO_N "checking for dlopen in -ldl... $ECHO_C" >&6
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dlopen ();
+int
+main ()
+{
+dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_dl_dlopen=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_dl_dlopen=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_dl_dlopen" >&5
+echo "${ECHO_T}$ac_cv_lib_dl_dlopen" >&6
+if test $ac_cv_lib_dl_dlopen = yes; then
+  appendCXX -D_MODULES
+fi
+
+		MODFLAGS="$CXXFLAGS"
+	else
+		echo "$as_me:$LINENO: checking for dlopen in -ldl" >&5
 echo $ECHO_N "checking for dlopen in -ldl... $ECHO_C" >&6
 if test "${ac_cv_lib_dl_dlopen+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
@@ -2757,7 +2818,8 @@ if test $ac_cv_lib_dl_dlopen = yes; then
   appendCXX -D_MODULES -rdynamic
 fi
 
-	MODFLAGS=`echo $CXXFLAGS | sed 's/-rdynamic//g'`
+		MODFLAGS=`echo $CXXFLAGS | sed 's/-rdynamic//g'`
+	fi
 	MODFLAGS="$MODFLAGS -I`pwd`"
 	MODTARGET="modules"
 	appendLib -ldl
diff --git a/configure.in b/configure.in
index 05ae48af..fd793b56 100644
--- a/configure.in
+++ b/configure.in
@@ -52,8 +52,13 @@ if test -z "$NOSSL"; then
 fi
 
 if test "$MODULES" = "yes"; then
-	AC_CHECK_LIB( dl, dlopen, appendCXX -D_MODULES -rdynamic,, )
-	MODFLAGS=`echo $CXXFLAGS | sed 's/-rdynamic//g'`
+	if test -n "$ISSUN"; then
+		AC_CHECK_LIB( dl, dlopen, appendCXX -D_MODULES,, )
+		MODFLAGS="$CXXFLAGS"
+	else
+		AC_CHECK_LIB( dl, dlopen, appendCXX -D_MODULES -rdynamic,, )
+		MODFLAGS=`echo $CXXFLAGS | sed 's/-rdynamic//g'`
+	fi
 	MODFLAGS="$MODFLAGS -I`pwd`"
 	MODTARGET="modules"
 	appendLib -ldl