Auto merge of rust-lang#2655 - RalfJung:rustc-build-sysroot, r=RalfJung

bump rustc-build-sysroot

Author: bors

src/tools/miri/cargo-miri/Cargo.lock

@@ -175,9 +175,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-build-sysroot"
-version = "0.3.3"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec5f3689b6c560d6a3a17fcbe54204cd870b4fcf46342d60de16715b660d2c92"
+checksum = "20c4b4625eeb148cccf82d5e9b90ad7fab3b11a0204cf75cc7fa04981a0fdffd"
 dependencies = [
  "anyhow",
  "rustc_version",

src/tools/miri/cargo-miri/Cargo.toml

@@ -18,7 +18,7 @@ directories = "4"
 rustc_version = "0.4"
 serde_json = "1.0.40"
 cargo_metadata = "0.15.0"
-rustc-build-sysroot = "0.3.3"
+rustc-build-sysroot = "0.4"
 
 # A noop dependency that changes in the Rust repository, it's a bit of a hack.
 # See the `src/tools/rustc-workspace-hack/README.md` file in `rust-lang/rust`

src/tools/miri/cargo-miri/src/setup.rs

@@ -5,7 +5,7 @@ use std::ffi::OsStr;
 use std::path::PathBuf;
 use std::process::{self, Command};
 
-use rustc_build_sysroot::{BuildMode, Sysroot, SysrootConfig};
+use rustc_build_sysroot::{BuildMode, SysrootBuilder, SysrootConfig};
 use rustc_version::VersionMeta;
 
 use crate::util::*;
@@ -67,9 +67,11 @@ pub fn setup(subcommand: &MiriCommand, target: &str, rustc_version: &VersionMeta
     let sysroot_config = if std::env::var_os("MIRI_NO_STD").is_some() {
         SysrootConfig::NoStd
     } else {
-        SysrootConfig::WithStd { std_features: &["panic_unwind", "backtrace"] }
+        SysrootConfig::WithStd {
+            std_features: ["panic_unwind", "backtrace"].into_iter().map(Into::into).collect(),
+        }
     };
-    let cargo_cmd = || {
+    let cargo_cmd = {
         let mut command = cargo();
         // Use Miri as rustc to build a libstd compatible with us (and use the right flags).
         // However, when we are running in bootstrap, we cannot just overwrite `RUSTC`,
@@ -103,13 +105,14 @@ pub fn setup(subcommand: &MiriCommand, target: &str, rustc_version: &VersionMeta
             command.stdout(process::Stdio::null());
             command.stderr(process::Stdio::null());
         }
-        // Disable debug assertions in the standard library -- Miri is already slow enough.
-        // But keep the overflow checks, they are cheap. This completely overwrites flags
-        // the user might have set, which is consistent with normal `cargo build` that does
-        // not apply `RUSTFLAGS` to the sysroot either.
-        let rustflags = vec!["-Cdebug-assertions=off".into(), "-Coverflow-checks=on".into()];
-        (command, rustflags)
+
+        command
     };
+    // Disable debug assertions in the standard library -- Miri is already slow enough.
+    // But keep the overflow checks, they are cheap. This completely overwrites flags
+    // the user might have set, which is consistent with normal `cargo build` that does
+    // not apply `RUSTFLAGS` to the sysroot either.
+    let rustflags = &["-Cdebug-assertions=off", "-Coverflow-checks=on"];
     // Make sure all target-level Miri invocations know their sysroot.
     std::env::set_var("MIRI_SYSROOT", sysroot_dir);
 
@@ -121,8 +124,13 @@ pub fn setup(subcommand: &MiriCommand, target: &str, rustc_version: &VersionMeta
         // We want to be quiet, but still let the user know that something is happening.
         eprint!("Preparing a sysroot for Miri (target: {target})... ");
     }
-    Sysroot::new(sysroot_dir, target)
-        .build_from_source(&rust_src, BuildMode::Check, sysroot_config, rustc_version, cargo_cmd)
+    SysrootBuilder::new(sysroot_dir, target)
+        .build_mode(BuildMode::Check)
+        .rustc_version(rustc_version.clone())
+        .sysroot_config(sysroot_config)
+        .rustflags(rustflags)
+        .cargo(cargo_cmd)
+        .build_from_source(&rust_src)
         .unwrap_or_else(|_| {
             if only_setup {
                 show_error!("failed to build sysroot, see error details above")