From 9215f68a0c2ad274b73862bc865fbdbb464e182a Mon Sep 17 00:00:00 2001
From: Stefano Brivio <sbrivio@redhat.com>
Date: Wed, 5 Feb 2025 16:57:55 +0100
Subject: passt-repair: Build fixes for musl

When building against musl headers:

- sizeof() needs stddef.h, as it should be;

- we can't initialise a struct msghdr by simply listing fields in
  order, as they contain explicit padding fields. Use field names
  instead.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 passt-repair.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/passt-repair.c b/passt-repair.c
index 6f79423..3c3247b 100644
--- a/passt-repair.c
+++ b/passt-repair.c
@@ -21,6 +21,7 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <errno.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -75,7 +76,11 @@ int main(int argc, char **argv)
 	}
 
 	iov = (struct iovec){ &cmd, sizeof(cmd) };
-	msg = (struct msghdr){ NULL, 0, &iov, 1, buf, sizeof(buf), 0 };
+	msg = (struct msghdr){ .msg_name = NULL, .msg_namelen = 0,
+			       .msg_iov = &iov, .msg_iovlen = 1,
+			       .msg_control = buf,
+			       .msg_controllen = sizeof(buf),
+			       .msg_flags = 0 };
 	cmsg = CMSG_FIRSTHDR(&msg);
 
 	if (argc != 2) {
-- 
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