Rollup merge of rust-lang#128937 - lqd:clean-rmake-tests, r=jieyouxu

Fix warnings in rmake tests on `x86_64-unknown-linux-gnu`

r? ````@jieyouxu````

This PR fixes some warnings I saw in rmake tests. I didn't deny more warnings in this PR until ````@jieyouxu```` gives their opinion, but maybe we should actually deny all warnings in `rmake.rs` files?

I've also only looked at non-ignored tests on `x86_64-unknown-linux-gnu`, and denying warnings would require a try build for all targets 😓.

tests/run-make/CURRENT_RUSTC_VERSION/rmake.rs

@@ -3,8 +3,6 @@
 // Check that the `CURRENT_RUSTC_VERSION` placeholder is correctly replaced by the current
 // `rustc` version and the `since` property in feature stability gating is properly respected.
 
-use std::path::PathBuf;
-
 use run_make_support::{aux_build, rfs, rustc, source_root};
 
 fn main() {

tests/run-make/arguments-non-c-like-enum/rmake.rs

@@ -4,8 +4,6 @@
 use run_make_support::{cc, extra_c_flags, extra_cxx_flags, run, rustc, static_lib_name};
 
 pub fn main() {
-    use std::path::Path;
-
     rustc().input("nonclike.rs").crate_type("staticlib").run();
     cc().input("test.c")
         .input(static_lib_name("nonclike"))

tests/run-make/c-link-to-rust-staticlib/rmake.rs

@@ -3,8 +3,6 @@
 
 //@ ignore-cross-compile
 
-use std::fs;
-
 use run_make_support::rfs::remove_file;
 use run_make_support::{cc, extra_c_flags, run, rustc, static_lib_name};
 

tests/run-make/comment-section/rmake.rs

@@ -7,9 +7,7 @@
 // FIXME(jieyouxu): check cross-compile setup
 //@ ignore-cross-compile
 
-use std::path::PathBuf;
-
-use run_make_support::{cwd, env_var, llvm_readobj, rfs, run_in_tmpdir, rustc};
+use run_make_support::{cwd, env_var, llvm_readobj, rfs, rustc};
 
 fn main() {
     let target = env_var("TARGET");

tests/run-make/compressed-debuginfo/rmake.rs

@@ -5,7 +5,7 @@
 
 // FIXME: This test isn't comprehensive and isn't covering all possible combinations.
 
-use run_make_support::{assert_contains, cmd, llvm_readobj, run_in_tmpdir, rustc};
+use run_make_support::{assert_contains, llvm_readobj, run_in_tmpdir, rustc};
 
 fn check_compression(compression: &str, to_find: &str) {
     run_in_tmpdir(|| {

tests/run-make/const_fn_mir/rmake.rs

@@ -2,7 +2,7 @@
 
 //@ needs-unwind
 
-use run_make_support::{cwd, diff, rustc};
+use run_make_support::{diff, rustc};
 
 fn main() {
     rustc().input("main.rs").emit("mir").output("dump-actual.mir").run();

tests/run-make/crate-loading/rmake.rs

@@ -2,14 +2,13 @@
 //@ ignore-wasm32
 //@ ignore-wasm64
 
-use run_make_support::rfs::copy;
-use run_make_support::{assert_contains, rust_lib_name, rustc};
+use run_make_support::{rust_lib_name, rustc};
 
 fn main() {
     rustc().input("multiple-dep-versions-1.rs").run();
     rustc().input("multiple-dep-versions-2.rs").extra_filename("2").metadata("2").run();
 
-    let out = rustc()
+    rustc()
         .input("multiple-dep-versions.rs")
         .extern_("dependency", rust_lib_name("dependency"))
         .extern_("dep_2_reexport", rust_lib_name("dependency2"))

tests/run-make/dylib-soname/rmake.rs

@@ -4,7 +4,6 @@
 //@ only-linux
 //@ ignore-cross-compile
 
-use run_make_support::regex::Regex;
 use run_make_support::{cmd, run_in_tmpdir, rustc};
 
 fn main() {

tests/run-make/extern-flag-disambiguates/rmake.rs

@@ -1,6 +1,6 @@
 //@ ignore-cross-compile
 
-use run_make_support::{cwd, run, rustc};
+use run_make_support::{run, rustc};
 
 // Attempt to build this dependency tree:
 //

tests/run-make/ice-dep-cannot-find-dep/rmake.rs

@@ -16,7 +16,7 @@
 //       If we used `rustc` the additional '-L rmake_out' option would allow rustc to
 //       actually find the crate.
 
-use run_make_support::{bare_rustc, rfs, rust_lib_name, rustc};
+use run_make_support::{bare_rustc, rust_lib_name, rustc};
 
 fn main() {
     rustc().crate_name("a").crate_type("rlib").input("a.rs").arg("--verbose").run();

tests/run-make/incr-test-moved-file/rmake.rs

@@ -14,7 +14,7 @@
 //@ ignore-nvptx64-nvidia-cuda
 // FIXME: can't find crate for 'std'
 
-use run_make_support::{rfs, rust_lib_name, rustc};
+use run_make_support::{rfs, rustc};
 
 fn main() {
     rfs::create_dir("incr");

tests/run-make/incremental-debugger-visualizer/rmake.rs

@@ -2,8 +2,6 @@
 // (in this case, foo.py and foo.natvis) are picked up when compiling incrementally.
 // See https://github.com/rust-lang/rust/pull/111641
 
-use std::io::Read;
-
 use run_make_support::{invalid_utf8_contains, invalid_utf8_not_contains, rfs, rustc};
 
 fn main() {

tests/run-make/lto-readonly-lib/rmake.rs

@@ -7,7 +7,7 @@
 
 //@ ignore-cross-compile
 
-use run_make_support::{rfs, run, rust_lib_name, rustc, test_while_readonly};
+use run_make_support::{run, rust_lib_name, rustc, test_while_readonly};
 
 fn main() {
     rustc().input("lib.rs").run();

tests/run-make/multiple-emits/rmake.rs

@@ -1,4 +1,4 @@
-use run_make_support::{cwd, path, rustc};
+use run_make_support::{path, rustc};
 
 fn main() {
     rustc().input("foo.rs").emit("asm,llvm-ir").output("out").run();

tests/run-make/naked-symbol-visibility/rmake.rs

@@ -3,7 +3,7 @@
 use run_make_support::object::read::{File, Object, Symbol};
 use run_make_support::object::ObjectSymbol;
 use run_make_support::targets::is_windows;
-use run_make_support::{dynamic_lib_name, env_var, rfs, rustc};
+use run_make_support::{dynamic_lib_name, rfs, rustc};
 
 fn main() {
     let rdylib_name = dynamic_lib_name("a_rust_dylib");

tests/run-make/non-unicode-in-incremental-dir/rmake.rs

@@ -8,7 +8,7 @@ fn main() {
     match std::fs::create_dir(&non_unicode) {
         // If an error occurs, check if creating a directory with a valid Unicode name would
         // succeed.
-        Err(e) if std::fs::create_dir("valid_unicode").is_ok() => {
+        Err(_) if std::fs::create_dir("valid_unicode").is_ok() => {
             // Filesystem doesn't appear support non-Unicode paths.
             return;
         }

tests/run-make/output-type-permutations/rmake.rs

@@ -113,7 +113,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "asm-emit".to_string(),
         },
         || {
@@ -123,7 +123,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "asm-emit2".to_string(),
         },
         || {
@@ -133,7 +133,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "asm-emit3".to_string(),
         },
         || {
@@ -144,7 +144,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-ir-emit".to_string(),
         },
         || {
@@ -154,7 +154,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-ir-emit2".to_string(),
         },
         || {
@@ -164,7 +164,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-ir-emit3".to_string(),
         },
         || {
@@ -175,7 +175,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-bc-emit".to_string(),
         },
         || {
@@ -185,7 +185,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-bc-emit2".to_string(),
         },
         || {
@@ -195,7 +195,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "llvm-bc-emit3".to_string(),
         },
         || {
@@ -206,7 +206,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "obj-emit".to_string(),
         },
         || {
@@ -216,7 +216,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "obj-emit2".to_string(),
         },
         || {
@@ -226,7 +226,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "obj-emit3".to_string(),
         },
         || {
@@ -268,7 +268,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "rlib".to_string(),
         },
         || {
@@ -278,7 +278,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "rlib2".to_string(),
         },
         || {
@@ -288,7 +288,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "rlib3".to_string(),
         },
         || {
@@ -375,7 +375,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "staticlib".to_string(),
         },
         || {
@@ -385,7 +385,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "staticlib2".to_string(),
         },
         || {
@@ -395,7 +395,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["foo"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "staticlib3".to_string(),
         },
         || {
@@ -449,7 +449,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["ir", rust_lib_name("bar")],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "rlib-ir".to_string(),
         },
         || {
@@ -466,7 +466,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["ir", "asm", "bc", "obj", "link"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "staticlib-all".to_string(),
         },
         || {
@@ -484,7 +484,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["ir", "asm", "bc", "obj", "link"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "staticlib-all2".to_string(),
         },
         || {
@@ -523,7 +523,7 @@ fn main() {
     assert_expected_output_files(
         Expectations {
             expected_files: s!["bar.bc", rust_lib_name("bar"), "foo.bc"],
-            allowed_files: s![],
+            allowed_files: vec![],
             test_dir: "rlib-emits".to_string(),
         },
         || {

tests/run-make/print-check-cfg/rmake.rs

@@ -4,7 +4,6 @@ extern crate run_make_support;
 
 use std::collections::HashSet;
 use std::iter::FromIterator;
-use std::ops::Deref;
 
 use run_make_support::rustc;
 

tests/run-make/print-native-static-libs/rmake.rs

@@ -12,8 +12,6 @@
 //@ ignore-cross-compile
 //@ ignore-wasm
 
-use std::io::BufRead;
-
 use run_make_support::{is_msvc, rustc};
 
 fn main() {

tests/run-make/redundant-libs/rmake.rs

@@ -11,9 +11,7 @@
 //@ ignore-cross-compile
 // Reason: the compiled binary is executed
 
-use run_make_support::{
-    build_native_dynamic_lib, build_native_static_lib, cwd, is_msvc, rfs, run, rustc,
-};
+use run_make_support::{build_native_dynamic_lib, build_native_static_lib, run, rustc};
 
 fn main() {
     build_native_dynamic_lib("foo");

tests/run-make/reproducible-build-2/rmake.rs

@@ -13,7 +13,7 @@
 // 2. When the sysroot gets copied, some symlinks must be re-created,
 // which is a privileged action on Windows.
 
-use run_make_support::{bin_name, rfs, rust_lib_name, rustc};
+use run_make_support::{rfs, rust_lib_name, rustc};
 
 fn main() {
     // test 1: fat lto

tests/run-make/reset-codegen-1/rmake.rs

@@ -9,7 +9,7 @@
 
 use std::path::Path;
 
-use run_make_support::{bin_name, rfs, rustc};
+use run_make_support::{bin_name, rustc};
 
 fn compile(output_file: &str, emit: Option<&str>) {
     let mut rustc = rustc();