Rollup merge of #130899 - bjorn3:wasi_bootstrap_fixes, r=davidtwco

Couple of changes to make it easier to compile rustc for wasm

This is a subset of the patches I have on my rust fork to compile rustc for wasm32-wasip1.

compiler/rustc_driver_impl/src/lib.rs

@@ -29,13 +29,12 @@ use std::path::PathBuf;
 use std::process::{self, Command, Stdio};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, OnceLock};
-use std::time::{Duration, Instant, SystemTime};
+use std::time::{Instant, SystemTime};
 use std::{env, str};
 
 use rustc_ast as ast;
 use rustc_codegen_ssa::traits::CodegenBackend;
 use rustc_codegen_ssa::{CodegenErrors, CodegenResults};
-use rustc_const_eval::CTRL_C_RECEIVED;
 use rustc_data_structures::profiling::{
     TimePassesFormat, get_resident_set_size, print_time_passes_entry,
 };
@@ -1577,8 +1576,8 @@ pub fn install_ctrlc_handler() {
         // time to check CTRL_C_RECEIVED and run its own shutdown logic, but after a short amount
         // of time exit the process. This sleep+exit ensures that even if nobody is checking
         // CTRL_C_RECEIVED, the compiler exits reasonably promptly.
-        CTRL_C_RECEIVED.store(true, Ordering::Relaxed);
-        std::thread::sleep(Duration::from_millis(100));
+        rustc_const_eval::CTRL_C_RECEIVED.store(true, Ordering::Relaxed);
+        std::thread::sleep(std::time::Duration::from_millis(100));
         std::process::exit(1);
     })
     .expect("Unable to install ctrlc handler");

compiler/rustc_fs_util/src/lib.rs

@@ -76,10 +76,14 @@ pub fn link_or_copy<P: AsRef<Path>, Q: AsRef<Path>>(p: P, q: Q) -> io::Result<Li
     }
 }
 
-#[cfg(unix)]
+#[cfg(any(unix, all(target_os = "wasi", target_env = "p1")))]
 pub fn path_to_c_string(p: &Path) -> CString {
     use std::ffi::OsStr;
+    #[cfg(unix)]
     use std::os::unix::ffi::OsStrExt;
+    #[cfg(all(target_os = "wasi", target_env = "p1"))]
+    use std::os::wasi::ffi::OsStrExt;
+
     let p: &OsStr = p.as_ref();
     CString::new(p.as_bytes()).unwrap()
 }