Auto merge of #53832 - pietroalbini:rollup, r=pietroalbini

Rollup of 20 pull requests

Successful merges:

 - #51760 (Add another PartialEq example)
 - #53113 (Add example for Cow)
 - #53129 (remove `let x = baz` which was obscuring the real error)
 - #53389 (document effect of join on memory ordering)
 - #53472 (Use FxHash{Map,Set} instead of the default Hash{Map,Set} everywhere in rustc.)
 - #53476 (Add partialeq implementation for TryFromIntError type)
 - #53513 (Force-inline `shallow_resolve` at its hottest call site.)
 - #53655 (set applicability)
 - #53702 (Fix stabilisation version for macro_vis_matcher.)
 - #53727 (Do not suggest dereferencing in macro)
 - #53732 (save-analysis: Differentiate foreign functions and statics.)
 - #53740 (add llvm-readobj to llvm-tools-preview)
 - #53743 (fix a typo: taget_env -> target_env)
 - #53747 (Rustdoc fixes)
 - #53753 (expand keep-stage --help text)
 - #53756 (Fix typo in comment)
 - #53768 (move file-extension based .gitignore down to src/)
 - #53785 (Fix a comment in src/libcore/slice/mod.rs)
 - #53786 (Replace usages of 'bad_style' with 'nonstandard_style'.)
 - #53806 (Fix UI issues on Implementations on Foreign types)

Failed merges:

r? @ghost

4 files changed, 5 insertions, 3 deletions

diff --git a/src/bootstrap/flags.rs b/src/bootstrap/flags.rs
index 60b4d65f444..2084b8bdb65 100644
--- a/src/bootstrap/flags.rs
+++ b/src/bootstrap/flags.rs
@@ -125,7 +125,8 @@ To learn more about a subcommand, run `./x.py <subcommand> -h`"
             "stage to build (indicates compiler to use/test, e.g. stage 0 uses the \
              bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)",
             "N");
-        opts.optmulti("", "keep-stage", "stage(s) to keep without recompiling", "N");
+        opts.optmulti("", "keep-stage", "stage(s) to keep without recompiling \
+            (pass multiple times to keep e.g. both stages 0 and 1)", "N");
         opts.optopt("", "src", "path to the root of the rust checkout", "DIR");
         opts.optopt("j", "jobs", "number of jobs to run in parallel", "JOBS");
         opts.optflag("h", "help", "print this help message");
diff --git a/src/bootstrap/job.rs b/src/bootstrap/job.rs
index 6445ce8da33..e6ee525ca2e 100644
--- a/src/bootstrap/job.rs
+++ b/src/bootstrap/job.rs
@@ -37,7 +37,7 @@
 //! Note that this module has a #[cfg(windows)] above it as none of this logic
 //! is required on Unix.
 
-#![allow(bad_style, dead_code)]
+#![allow(nonstandard_style, dead_code)]
 
 use std::env;
 use std::io;
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index b6a89e1c18f..2725abdc3d9 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -211,6 +211,7 @@ const LLVM_TOOLS: &[&str] = &[
     "llvm-objcopy", // used to transform ELFs into binary format which flashing tools consume
     "llvm-objdump", // used to disassemble programs
     "llvm-profdata", // used to inspect and merge files generated by profiles
+    "llvm-readobj", // used to get information from ELFs/objects that the other tools don't provide
     "llvm-size", // used to prints the size of the linker sections of a program
     "llvm-strip", // used to discard symbols from binary files to reduce their size
 ];
diff --git a/src/bootstrap/util.rs b/src/bootstrap/util.rs
index be03796921a..8ce8f20add3 100644
--- a/src/bootstrap/util.rs
+++ b/src/bootstrap/util.rs
@@ -137,7 +137,7 @@ pub fn symlink_dir(config: &Config, src: &Path, dest: &Path) -> io::Result<()> {
     //
     // Copied from std
     #[cfg(windows)]
-    #[allow(bad_style)]
+    #[allow(nonstandard_style)]
     fn symlink_dir_inner(target: &Path, junction: &Path) -> io::Result<()> {
         use std::ptr;
         use std::ffi::OsStr;