Interleaving inclusions of UAPI headers and libc headers is problematic.
Both sets of headers define conflicting symbols. To enable their
coexistence a compatibility-mechanism is in place.

An upcoming change will define 'struct sockaddr' from linux/socket.h.
However sys/socket.h from libc does not yet handle this case and a
symbol conflict will arise.

Move the inclusion of all UAPI headers after the inclusion of the glibc
ones, so the compatibility mechanism from the UAPI headers is used.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
 tools/testing/selftests/landlock/audit.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/landlock/audit.h b/tools/testing/selftests/landlock/audit.h
index 44eb433e9666..c12b16c690dc 100644
--- a/tools/testing/selftests/landlock/audit.h
+++ b/tools/testing/selftests/landlock/audit.h
@@ -7,9 +7,6 @@
 
 #define _GNU_SOURCE
 #include <errno.h>
-#include <linux/audit.h>
-#include <linux/limits.h>
-#include <linux/netlink.h>
 #include <regex.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -20,6 +17,10 @@
 #include <sys/time.h>
 #include <unistd.h>
 
+#include <linux/audit.h>
+#include <linux/limits.h>
+#include <linux/netlink.h>
+
 #include "kselftest.h"
 
 #ifndef ARRAY_SIZE

-- 
2.52.0

On Tue, Jan 20, 2026 at 03:10:32PM +0100, Thomas Weißschuh wrote:
> Interleaving inclusions of UAPI headers and libc headers is problematic.
> Both sets of headers define conflicting symbols. To enable their
> coexistence a compatibility-mechanism is in place.
> 
> An upcoming change will define 'struct sockaddr' from linux/socket.h.
> However sys/socket.h from libc does not yet handle this case and a
> symbol conflict will arise.
> 
> Move the inclusion of all UAPI headers after the inclusion of the glibc
> ones, so the compatibility mechanism from the UAPI headers is used.
> 
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>

Reviewed-by: Mickaël Salaün <mic@digikod.net>

Thanks!

> ---
>  tools/testing/selftests/landlock/audit.h | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/landlock/audit.h b/tools/testing/selftests/landlock/audit.h
> index 44eb433e9666..c12b16c690dc 100644
> --- a/tools/testing/selftests/landlock/audit.h
> +++ b/tools/testing/selftests/landlock/audit.h
> @@ -7,9 +7,6 @@
>  
>  #define _GNU_SOURCE
>  #include <errno.h>
> -#include <linux/audit.h>
> -#include <linux/limits.h>
> -#include <linux/netlink.h>
>  #include <regex.h>
>  #include <stdbool.h>
>  #include <stdint.h>
> @@ -20,6 +17,10 @@
>  #include <sys/time.h>
>  #include <unistd.h>
>  
> +#include <linux/audit.h>
> +#include <linux/limits.h>
> +#include <linux/netlink.h>
> +
>  #include "kselftest.h"
>  
>  #ifndef ARRAY_SIZE
> 
> -- 
> 2.52.0
> 
>