Rollup merge of rust-lang#101942 - Mark-Simulacrum:fix-perf, r=jyn514

Revert "Copy stage0 binaries into stage0-sysroot"

This reverts PR rust-lang#101711.

The PR broke the rustc/bootstrap benchmark on rustc-perf, I believe due to the assumption that the stage0 directory exists. Fixing that by just skipping this logic might be reasonable, but I think there's a larger discussion to be had around the right behavior when we don't have a single bin/ directory (when rustc= and cargo= are specified in config.toml). I think it's potentially reasonable to put those binaries (cargo, rustc, rustfmt?) into the bin directory, but for now just want to get us back to a healthy state.

r? `@jyn514` (but would appreciate review from others as this is just a direct revert).

src/bootstrap/compile.rs

@@ -436,43 +436,6 @@ impl Step for StdLink {
         let libdir = builder.sysroot_libdir(target_compiler, target);
         let hostdir = builder.sysroot_libdir(target_compiler, compiler.host);
         add_to_sysroot(builder, &libdir, &hostdir, &libstd_stamp(builder, compiler, target));
-
-        if compiler.stage == 0 {
-            // special handling for stage0, to make `rustup toolchain link` and `x dist --stage 0`
-            // work for stage0-sysroot
-
-            // copy bin files from stage0/bin to stage0-sysroot/bin
-            let sysroot = builder.out.join(&compiler.host.triple).join("stage0-sysroot");
-
-            let host = compiler.host.triple;
-            let stage0_bin_dir = builder.out.join(&host).join("stage0/bin");
-            let sysroot_bin_dir = sysroot.join("bin");
-            t!(fs::create_dir_all(&sysroot_bin_dir));
-            builder.cp_r(&stage0_bin_dir, &sysroot_bin_dir);
-
-            // copy all *.so files from stage0/lib to stage0-sysroot/lib
-            let stage0_lib_dir = builder.out.join(&host).join("stage0/lib");
-            if let Ok(files) = fs::read_dir(&stage0_lib_dir) {
-                for file in files {
-                    let file = t!(file);
-                    let path = file.path();
-                    if path.is_file() && is_dylib(&file.file_name().into_string().unwrap()) {
-                        builder.copy(&path, &sysroot.join("lib").join(path.file_name().unwrap()));
-                    }
-                }
-            }
-
-            // copy codegen-backends from stage0
-            let sysroot_codegen_backends = builder.sysroot_codegen_backends(compiler);
-            t!(fs::create_dir_all(&sysroot_codegen_backends));
-            let stage0_codegen_backends = builder
-                .out
-                .join(&host)
-                .join("stage0/lib/rustlib")
-                .join(&host)
-                .join("codegen-backends");
-            builder.cp_r(&stage0_codegen_backends, &sysroot_codegen_backends);
-        }
     }
 }