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-rw-r--r--src/bootstrap/builder.rs22
-rw-r--r--src/bootstrap/check.rs3
-rw-r--r--src/bootstrap/dist.rs2
-rw-r--r--src/bootstrap/doc.rs12
-rw-r--r--src/bootstrap/lib.rs23
-rw-r--r--src/bootstrap/test.rs5
-rw-r--r--src/bootstrap/tool.rs35
7 files changed, 73 insertions, 29 deletions
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index fa2440e27d0..fad0a553802 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -769,6 +769,22 @@ impl<'a> Builder<'a> {
 
         let want_rustdoc = self.doc_tests != DocTests::No;
 
+        // We synthetically interpret a stage0 compiler used to build tools as a
+        // "raw" compiler in that it's the exact snapshot we download. Normally
+        // the stage0 build means it uses libraries build by the stage0
+        // compiler, but for tools we just use the precompiled libraries that
+        // we've downloaded
+        let use_snapshot = mode == Mode::ToolBootstrap;
+        assert!(!use_snapshot || stage == 0);
+
+        let maybe_sysroot = self.sysroot(compiler);
+        let sysroot = if use_snapshot {
+            self.rustc_snapshot_sysroot()
+        } else {
+            &maybe_sysroot
+        };
+        let libdir = sysroot.join(libdir(&compiler.host));
+
         // Customize the compiler we're running. Specify the compiler to cargo
         // as our shim and then pass it some various options used to configure
         // how the actual compiler itself is called.
@@ -784,8 +800,8 @@ impl<'a> Builder<'a> {
                 "RUSTC_DEBUG_ASSERTIONS",
                 self.config.rust_debug_assertions.to_string(),
             )
-            .env("RUSTC_SYSROOT", self.sysroot(compiler))
-            .env("RUSTC_LIBDIR", self.rustc_libdir(compiler))
+            .env("RUSTC_SYSROOT", &sysroot)
+            .env("RUSTC_LIBDIR", &libdir)
             .env("RUSTC_RPATH", self.config.rust_rpath.to_string())
             .env("RUSTDOC", self.out.join("bootstrap/debug/rustdoc"))
             .env(
@@ -809,7 +825,7 @@ impl<'a> Builder<'a> {
             cargo.env("RUSTC_ERROR_FORMAT", error_format);
         }
         if cmd != "build" && cmd != "check" && want_rustdoc {
-            cargo.env("RUSTDOC_LIBDIR", self.sysroot_libdir(compiler, self.config.build));
+            cargo.env("RUSTDOC_LIBDIR", &libdir);
         }
 
         if mode.is_tool() {
diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index b3ccb3cc3c9..39c5c832831 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -273,5 +273,6 @@ fn codegen_backend_stamp(builder: &Builder,
 /// Cargo's output path for rustdoc in a given stage, compiled by a particular
 /// compiler for the specified target.
 pub fn rustdoc_stamp(builder: &Builder, compiler: Compiler, target: Interned<String>) -> PathBuf {
-    builder.cargo_out(compiler, Mode::ToolRustc, target).join(".rustdoc-check.stamp")
+    builder.cargo_out(compiler, Mode::ToolRustc, target)
+        .join(".rustdoc-check.stamp")
 }
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 19a2c94dca7..398730a10b9 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -957,7 +957,7 @@ impl Step for PlainSourceTarball {
             if !has_cargo_vendor {
                 let mut cmd = builder.cargo(
                     builder.compiler(0, builder.config.build),
-                    Mode::ToolRustc,
+                    Mode::ToolBootstrap,
                     builder.config.build,
                     "install"
                 );
diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index 19599b33ebe..f71cb119b77 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -799,14 +799,22 @@ impl Step for Rustdoc {
         builder.ensure(tool::Rustdoc { host: compiler.host });
 
         // Symlink compiler docs to the output directory of rustdoc documentation.
-        let out_dir = builder.stage_out(compiler, Mode::ToolRustc).join(target).join("doc");
+        let out_dir = builder.stage_out(compiler, Mode::ToolRustc)
+            .join(target)
+            .join("doc");
         t!(fs::create_dir_all(&out_dir));
         builder.clear_if_dirty(&out, &rustdoc);
         t!(symlink_dir_force(&builder.config, &out, &out_dir));
 
         // Build cargo command.
         let mut cargo = prepare_tool_cargo(
-            builder, compiler, Mode::ToolRustc, target, "doc", "src/tools/rustdoc");
+            builder,
+            compiler,
+            Mode::ToolRustc,
+            target,
+            "doc",
+            "src/tools/rustdoc",
+        );
 
         cargo.env("RUSTDOCFLAGS", "--document-private-items");
         builder.run(&mut cargo);
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 414f17dfad4..ed2482aeea0 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -328,16 +328,22 @@ pub enum Mode {
     /// Build codegen libraries, placing output in the "stageN-codegen" directory
     Codegen,
 
-    /// Build some tools, placing output in the "stageN-tools" directory.
-    ToolStd,
-    ToolTest,
+    /// Build some tools, placing output in the "stageN-tools" directory. The
+    /// "other" here is for miscellaneous sets of tools that are built using the
+    /// bootstrap compiler in its entirety (target libraries and all).
+    /// Typically these tools compile with stable Rust.
+    ToolBootstrap,
+
+    /// Compile a tool which uses all libraries we compile (up to rustc).
+    /// Doesn't use the stage0 compiler libraries like "other", and includes
+    /// tools like rustdoc, cargo, rls, etc.
     ToolRustc,
 }
 
 impl Mode {
     pub fn is_tool(&self) -> bool {
         match self {
-            Mode::ToolStd | Mode::ToolTest | Mode::ToolRustc => true,
+            Mode::ToolBootstrap | Mode::ToolRustc => true,
             _ => false
         }
     }
@@ -547,7 +553,8 @@ impl Build {
             Mode::Test => "-test",
             Mode::Codegen => "-rustc",
             Mode::Rustc => "-rustc",
-            Mode::ToolStd | Mode::ToolTest | Mode::ToolRustc => "-tools",
+            Mode::ToolBootstrap => "-bootstrap-tools",
+            Mode::ToolRustc => "-tools",
         };
         self.out.join(&*compiler.host)
                 .join(format!("stage{}{}", compiler.stage, suffix))
@@ -656,8 +663,12 @@ impl Build {
 
     /// Returns the libdir of the snapshot compiler.
     fn rustc_snapshot_libdir(&self) -> PathBuf {
+        self.rustc_snapshot_sysroot().join(libdir(&self.config.build))
+    }
+
+    /// Returns the sysroot of the snapshot compiler.
+    fn rustc_snapshot_sysroot(&self) -> &Path {
         self.initial_rustc.parent().unwrap().parent().unwrap()
-            .join(libdir(&self.config.build))
     }
 
     /// Runs a command, printing out nice contextual information if it fails.
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 3adfbb5e36b..6254f981656 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1806,7 +1806,10 @@ impl Step for RemoteCopyLibs {
         builder.info(&format!("REMOTE copy libs to emulator ({})", target));
         t!(fs::create_dir_all(builder.out.join("tmp")));
 
-        let server = builder.ensure(tool::RemoteTestServer { compiler, target });
+        let server = builder.ensure(tool::RemoteTestServer {
+            compiler: compiler.with_stage(0),
+            target,
+        });
 
         // Spawn the emulator and wait for it to come online
         let tool = builder.tool_exe(Tool::RemoteTestClient);
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index 23b3f5a0826..e98e3745fda 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -104,9 +104,10 @@ impl Step for ToolBuild {
         let is_ext_tool = self.is_ext_tool;
 
         match self.mode {
-            Mode::ToolStd => builder.ensure(compile::Std { compiler, target }),
-            Mode::ToolTest => builder.ensure(compile::Test { compiler, target }),
-            Mode::ToolRustc => builder.ensure(compile::Rustc { compiler, target }),
+            Mode::ToolRustc => {
+                builder.ensure(compile::Rustc { compiler, target })
+            }
+            Mode::ToolBootstrap => {} // uses downloaded stage0 compiler libs
             _ => panic!("unexpected Mode for tool build")
         }
 
@@ -341,17 +342,17 @@ macro_rules! tool {
 }
 
 tool!(
-    Rustbook, "src/tools/rustbook", "rustbook", Mode::ToolRustc;
+    Rustbook, "src/tools/rustbook", "rustbook", Mode::ToolBootstrap;
     ErrorIndex, "src/tools/error_index_generator", "error_index_generator", Mode::ToolRustc;
-    UnstableBookGen, "src/tools/unstable-book-gen", "unstable-book-gen", Mode::ToolStd;
-    Tidy, "src/tools/tidy", "tidy", Mode::ToolStd;
-    Linkchecker, "src/tools/linkchecker", "linkchecker", Mode::ToolStd;
-    CargoTest, "src/tools/cargotest", "cargotest", Mode::ToolStd;
-    Compiletest, "src/tools/compiletest", "compiletest", Mode::ToolTest, llvm_tools = true;
-    BuildManifest, "src/tools/build-manifest", "build-manifest", Mode::ToolStd;
-    RemoteTestClient, "src/tools/remote-test-client", "remote-test-client", Mode::ToolStd;
-    RustInstaller, "src/tools/rust-installer", "fabricate", Mode::ToolStd;
-    RustdocTheme, "src/tools/rustdoc-themes", "rustdoc-themes", Mode::ToolStd;
+    UnstableBookGen, "src/tools/unstable-book-gen", "unstable-book-gen", Mode::ToolBootstrap;
+    Tidy, "src/tools/tidy", "tidy", Mode::ToolBootstrap;
+    Linkchecker, "src/tools/linkchecker", "linkchecker", Mode::ToolBootstrap;
+    CargoTest, "src/tools/cargotest", "cargotest", Mode::ToolBootstrap;
+    Compiletest, "src/tools/compiletest", "compiletest", Mode::ToolBootstrap, llvm_tools = true;
+    BuildManifest, "src/tools/build-manifest", "build-manifest", Mode::ToolBootstrap;
+    RemoteTestClient, "src/tools/remote-test-client", "remote-test-client", Mode::ToolBootstrap;
+    RustInstaller, "src/tools/rust-installer", "fabricate", Mode::ToolBootstrap;
+    RustdocTheme, "src/tools/rustdoc-themes", "rustdoc-themes", Mode::ToolBootstrap;
 );
 
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
@@ -379,7 +380,7 @@ impl Step for RemoteTestServer {
             compiler: self.compiler,
             target: self.target,
             tool: "remote-test-server",
-            mode: Mode::ToolStd,
+            mode: Mode::ToolBootstrap,
             path: "src/tools/remote-test-server",
             is_ext_tool: false,
             extra_features: Vec::new(),
@@ -604,7 +605,11 @@ impl<'a> Builder<'a> {
     fn prepare_tool_cmd(&self, compiler: Compiler, tool: Tool, cmd: &mut Command) {
         let host = &compiler.host;
         let mut lib_paths: Vec<PathBuf> = vec![
-            PathBuf::from(&self.sysroot_libdir(compiler, compiler.host)),
+            if compiler.stage == 0 {
+                self.build.rustc_snapshot_libdir()
+            } else {
+                PathBuf::from(&self.sysroot_libdir(compiler, compiler.host))
+            },
             self.cargo_out(compiler, tool.get_mode(), *host).join("deps"),
         ];
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-04-23 20:02:00 +0000