Re: [RFC PATCH] samples/landlock: Fix building on musl libc
From: Mickaël Salaün <mic@digikod.net>
Date: 2025-07-01 08:51:05
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On Tue, Jul 01, 2025 at 02:02:48AM +0530, Brahmajit Das wrote:
Building with make allyesconfig on musl results in the following
In file included from samples/landlock/sandboxer.c:22:
/usr/include/sys/prctl.h:88:8: error: redefinition of 'struct prctl_mm_map'
88 | struct prctl_mm_map {
| ^~~~~~~~~~~~
In file included from samples/landlock/sandboxer.c:16:
usr/include/linux/prctl.h:134:8: note: originally defined here
134 | struct prctl_mm_map {
| ^~~~~~~~~~~~
This is mainly due to differnece in the sys/prctl.h between glibC and
musl. The struct prctl_mm_map is defined in sys/prctl.h in musl.
Signed-off-by: Brahmajit Das <redacted>Thanks, applied to my -next tree. I just moved down the if/include/endif block. I tested it with check-linux.sh from https://github.com/landlock-lsm/landlock-test-tools ARCH=x86_64 CC=musl-gcc check-linux.sh build
quoted hunk ↗ jump to hunk
--- samples/landlock/sandboxer.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c index 4e2854c6f9a3..3cc990618f5b 100644 --- a/samples/landlock/sandboxer.c +++ b/samples/landlock/sandboxer.c@@ -13,7 +13,9 @@ #include <errno.h> #include <fcntl.h> #include <linux/landlock.h> +#if defined(__GLIBC__) #include <linux/prctl.h> +#endif #include <linux/socket.h> #include <stddef.h> #include <stdio.h>-- 2.50.0