Auto merge of rust-lang#78439 - lzutao:rm-clouldabi, r=Mark-Simulacrum

Drop support for all cloudabi targets

`cloudabi` is a tier-3 target, and [it is no longer being maintained upstream][no].

This PR drops supports for cloudabi targets. Those targets are:
* aarch64-unknown-cloudabi
* armv7-unknown-cloudabi
* i686-unknown-cloudabi
* x86_64-unknown-cloudabi

Since this drops supports for a target, I'd like somebody to tag `relnotes` label to this PR.

Some other issues:
* The tidy exception for `cloudabi` crate is still remained because
  * `parking_lot v0.9.0` and `parking_lot v0.10.2` depends on `cloudabi v0.0.3`.
  * `parking_lot v0.11.0` depends on `cloudabi v0.1.0`.

[no]: https://github.com/NuxiNL/cloudabi#note-this-project-is-unmaintained

Author: bors

panic_abort/src/lib.rs

@@ -32,7 +32,7 @@ pub unsafe extern "C" fn __rust_start_panic(_payload: usize) -> u32 {
     abort();
 
     cfg_if::cfg_if! {
-        if #[cfg(any(unix, target_os = "cloudabi"))] {
+        if #[cfg(unix)] {
             unsafe fn abort() -> ! {
                 libc::abort();
             }

panic_unwind/src/lib.rs

@@ -49,7 +49,6 @@ cfg_if::cfg_if! {
         mod real_imp;
     } else if #[cfg(any(
         all(target_family = "windows", target_env = "gnu"),
-        target_os = "cloudabi",
         target_os = "psp",
         target_family = "unix",
         all(target_vendor = "fortanix", target_env = "sgx"),

std/build.rs

@@ -18,7 +18,6 @@ fn main() {
         || target.contains("uwp")
         || target.contains("windows")
         || target.contains("fuchsia")
-        || target.contains("cloudabi")
         || (target.contains("sgx") && target.contains("fortanix"))
         || target.contains("hermit")
         || target.contains("l4re")

std/src/fs.rs

@@ -8,7 +8,7 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 #![deny(unsafe_op_in_unsafe_fn)]
 
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten", target_env = "sgx"))))]
+#[cfg(all(test, not(any(target_os = "emscripten", target_env = "sgx"))))]
 mod tests;
 
 use crate::ffi::OsString;

std/src/net/tcp.rs

@@ -1,6 +1,6 @@
 #![deny(unsafe_op_in_unsafe_fn)]
 
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten"))))]
+#[cfg(all(test, not(target_os = "emscripten")))]
 mod tests;
 
 use crate::io::prelude::*;

std/src/net/udp.rs

@@ -1,4 +1,4 @@
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten", target_env = "sgx"))))]
+#[cfg(all(test, not(any(target_os = "emscripten", target_env = "sgx"))))]
 mod tests;
 
 use crate::fmt;

std/src/process.rs

@@ -97,7 +97,7 @@
 #![stable(feature = "process", since = "1.0.0")]
 #![deny(unsafe_op_in_unsafe_fn)]
 
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten", target_env = "sgx"))))]
+#[cfg(all(test, not(any(target_os = "emscripten", target_env = "sgx"))))]
 mod tests;
 
 use crate::io::prelude::*;