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c8135455c4
Fix failing build of std on armv5te-unknown-linux-uclibceabi due to missing cmsg_len_zero
I'm getting the following error when trying to build `std` on `armv5te-unknown-linux-uclibceabi`:
```
error[E0425]: cannot find value `cmsg_len_zero` in this scope
--> /home/operutka/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/unix/ext/net/ancillary.rs:376:47
|
376 | let data_len = (*cmsg).cmsg_len - cmsg_len_zero;
| ^^^^^^^^^^^^^ not found in this scope
```
Obviously, this branch:
```rust
cfg_if::cfg_if! {
if #[cfg(any(target_os = "android", all(target_os = "linux", target_env = "gnu")))] {
let cmsg_len_zero = libc::CMSG_LEN(0) as libc::size_t;
} else if #[cfg(any(
target_os = "dragonfly",
target_os = "emscripten",
target_os = "freebsd",
all(target_os = "linux", target_env = "musl",),
target_os = "netbsd",
target_os = "openbsd",
))] {
let cmsg_len_zero = libc::CMSG_LEN(0) as libc::socklen_t;
}
}
```
does not cover the case `all(target_os = "linux", target_env = "uclibc")`.
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| .. | ||
| benches | ||
| src | ||
| tests | ||
| build.rs | ||
| Cargo.toml | ||