Ensure we add --no-undefined to libtool for cygwin

This commit was SVN r29389.

configure.ac

@@ -1323,6 +1323,20 @@ m4_ifdef([project_ompi],
 # Party on
 ############################################################################
 
+AC_MSG_CHECKING([if libtool needs -no-undefined flag to build shared libraries])
+case "`uname`" in
+  CYGWIN*|MINGW*|AIX*)
+    ## Add in the -no-undefined flag to LDFLAGS for libtool.
+    AC_MSG_RESULT([yes])
+    LDFLAGS="$LDFLAGS -no-undefined"
+    ;;
+  *)
+    ## Don't add in anything.
+    AC_MSG_RESULT([no])
+    ;;
+esac
+
+
 ompi_show_subtitle "Final output"
 
 AC_CONFIG_FILES([