1 This patch removes the _XOPEN_SOURCE preprocessor directive as it does not seem to be needed.
2 Setting it removes the definition of strdup, which is used in filter-datatypes.c.
4 Patch by Roel Janssen <roel@gnu.org>
5 *** a/src/frontend/filter-datatypes.c 1970-01-01 01:00:00.000000000 +0100
6 --- b/src/frontend/filter-datatypes.c 2018-04-03 17:39:23.177905592 +0200
9 * Copyright (C) 2006 Steve Harris for Garlik
12 - #define _XOPEN_SOURCE