X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/847a015ae17b3fa66154088009803636f95b2c6f..586d7aa579e3038e63c51669dce2cb0677f335e3:/src/OS/os.h-GNU

diff --git a/src/OS/os.h-GNU b/src/OS/os.h-GNU
index 1de2e3e84..4fe55fa5e 100644
--- a/src/OS/os.h-GNU
+++ b/src/OS/os.h-GNU
@@ -1,4 +1,8 @@
 /* Exim: OS-specific C header file for GNU/Hurd */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <features.h>
 
 #define CRYPT_H
 #define GLIBC_IP_OPTIONS
@@ -24,4 +28,8 @@ typedef struct flock flock_t;
 as well as any supplementary groups*/
 #define OS_SETGROUPS_ZERO_DROPS_ALL
 
+#if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOURCE
+# define EXIM_HAVE_OPENAT
+#endif
+
 /* End */