failed to build binary for mipsel musl

[1715173329]

Same error could be seen on:

mips-unknown-linux-musl
mipsel-unknown-linux-musl
i686-unknown-linux-musl

Version: 1.10.0+

Error log:

error[E0425]: cannot find value `SO_INCOMING_CPU` in crate `libc`
    --> /cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/sys/unix.rs:1201:69
     |
1201 |             getsockopt::<c_int>(self.inner, libc::SOL_SOCKET, libc::SO_INCOMING_CPU)
     |                                                                     ^^^^^^^^^^^^^^^ not found in `libc`

error[E0425]: cannot find value `SO_INCOMING_CPU` in crate `libc`
    --> /cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/sys/unix.rs:1217:23
     |
1217 |                 libc::SO_INCOMING_CPU,
     |                       ^^^^^^^^^^^^^^^ not found in `libc`

   Compiling thread-id v3.3.0
   Compiling atty v0.2.14
error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0425`.
error: could not compile `socket2`

See also: https://github.com/shadowsocks/shadowsocks-rust/runs/2210928621?check_suite_focus=true#step:4:371

[zonyitoo]

rust-lang/socket2#213

[zonyitoo]

Fixed in libc's master branch.