Alpine musl libc build fails with `cannot construct `msghdr` with struct literal syntax due to private fields`

[strophy]

I'm trying to package quiche 0.24.5 for Alpine Linux , building with Rust 1.90 and latest libc crate 0.2.177. This errors with:

   Compiling serde_path_to_error v0.1.20
   Compiling datagram-socket v0.3.0 (/home/builder/package/testing/quiche/src/quiche-0.24.5/datagram-socket)
error: cannot construct `msghdr` with struct literal syntax due to private fields
  --> datagram-socket/src/mmsg.rs:59:26
   |
59 |                 msg_hdr: libc::msghdr {
   |                          ^^^^^^^^^^^^
   |
   = note: ...and other private fields `__pad1` and `__pad2` that were not provided

error: cannot construct `msghdr` with struct literal syntax due to private fields
   --> datagram-socket/src/mmsg.rs:119:26
    |
119 |                 msg_hdr: libc::msghdr {
    |                          ^^^^^^^^^^^^
    |
    = note: ...and other private fields `__pad1` and `__pad2` that were not provided

   Compiling slog-stdlog v4.1.1
error: could not compile `datagram-socket` (lib) due to 2 previous errors

msghdr cannot be directly instantiated on musl due to private padding fields, the issue rust-lang/libc#2344 is marked "wontfix". Other projects have solved the issues using mem::zeroed, see anza-xyz/agave#3836 and anza-xyz/agave#4760