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1From 8be51b7c3520fd2dbd1ba2e917a499c90822817f Mon Sep 17 00:00:00 2001
2From: Alyssa Ross <hi@alyssa.is>
3Date: Tue, 27 Jan 2026 10:46:19 +0100
4Subject: [PATCH] Fix build for musl
5MIME-Version: 1.0
6Content-Type: text/plain; charset=UTF-8
7Content-Transfer-Encoding: 8bit
8
9musl's struct msghdr includes padding members, so using undesignated
10initializers as was previously being done ended up initializing the
11wrong members:
12
13 gcc -O -D_GNU_SOURCE -Wall -Wno-parentheses -DHAVE_CONFIG_H -I. -I. -c -o xio-netlink.o xio-netlink.c
14 xio-netlink.c: In function ‘xio_netlink_mtu’:
15 xio-netlink.c:33:59: error: initialization of ‘int’ from ‘void *’ makes integer from pointer without a cast [-Wint-conversion]
16 33 | ct msghdr rtmsg = { &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
17 | ^~~~
18 xio-netlink.c:33:59: note: (near initialization for ‘rtmsg.__pad1’)
19 make: *** [<builtin>: xio-netlink.o] Error 1
20---
21 xio-netlink.c | 7 ++++++-
22 1 file changed, 6 insertions(+), 1 deletion(-)
23
24diff --git a/xio-netlink.c b/xio-netlink.c
25index 533d78c..b0c5c3c 100644
26--- a/xio-netlink.c
27+++ b/xio-netlink.c
28@@ -30,7 +30,12 @@ int xio_netlink_mtu(
29 struct nlmsghdr buf[8192/sizeof(struct nlmsghdr)];
30 struct iovec iov = { buf, sizeof(buf) };
31 struct sockaddr_nl sa;
32- struct msghdr rtmsg = { &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
33+ struct msghdr rtmsg = {
34+ .msg_name = &sa,
35+ .msg_namelen = sizeof(sa),
36+ .msg_iov = &iov,
37+ .msg_iovlen = 1,
38+ };
39 struct nlmsghdr *nh;
40
41 Info2("Setting interface %d MTU to %u using netlink", interface_index, mtu);
42
43base-commit: 8834d6cc7e0d7b04cd31f9f7d0cb3e06913b0323
44--
452.52.0
46