Auto merge of #144692 - samueltardieu:rollup-0j1y08x, r=samueltardieu

Rollup of 4 pull requests

Successful merges:

 - #143465 (Support multiple crate versions in --extern-html-root-url)
 - #144308 ([rustdoc] Display total time and compilation time of merged doctests)
 - #144655 (clean up codegen fn attrs)
 - #144675 (Reject running `compiletest` self-tests against stage 0 rustc unless explicitly allowed)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

bootstrap.example.toml

@@ -465,6 +465,11 @@
 # What custom diff tool to use for displaying compiletest tests.
 #build.compiletest-diff-tool = <none>
 
+# Whether to allow `compiletest` self-tests and `compiletest`-managed test
+# suites to be run against the stage 0 rustc. This is only intended to be used
+# when the stage 0 compiler is actually built from in-tree sources.
+#build.compiletest-allow-stage0 = false
+
 # Whether to use the precompiled stage0 libtest with compiletest.
 #build.compiletest-use-stage0-libtest = true
 

compiler/rustc_codegen_cranelift/scripts/setup_rust_fork.sh

@@ -33,6 +33,7 @@ rustc = "$(pwd)/../dist/bin/rustc-clif"
 cargo = "$(rustup which cargo)"
 full-bootstrap = true
 local-rebuild = true
+compiletest-allow-stage0 = true
 
 [rust]
 download-rustc = false

compiler/rustc_codegen_cranelift/scripts/test_rustc_tests.sh

@@ -166,5 +166,5 @@ index 073116933bd..c3e4578204d 100644
 EOF
 
 echo "[TEST] rustc test suite"
-COMPILETEST_FORCE_STAGE0=1 ./x.py test --stage 0 --test-args=--no-capture tests/{codegen-units,run-make,ui,incremental}
+./x.py test --stage 0 --test-args=--no-capture tests/{codegen-units,run-make,ui,incremental}
 popd

compiler/rustc_codegen_gcc/build_system/src/test.rs

@@ -561,8 +561,6 @@ fn asm_tests(env: &Env, args: &TestArg) -> Result<(), String> {
     // FIXME: create a function "display_if_not_quiet" or something along the line.
     println!("[TEST] rustc asm test suite");
 
-    env.insert("COMPILETEST_FORCE_STAGE0".to_string(), "1".to_string());
-
     let codegen_backend_path = format!(
         "{pwd}/target/{channel}/librustc_codegen_gcc.{dylib_ext}",
         pwd = std::env::current_dir()
@@ -588,6 +586,8 @@ fn asm_tests(env: &Env, args: &TestArg) -> Result<(), String> {
             &"always",
             &"--stage",
             &"0",
+            &"--set",
+            &"build.compiletest-allow-stage0=true",
             &"tests/assembly-llvm/asm",
             &"--compiletest-rustc-args",
             &rustc_args,
@@ -1047,7 +1047,6 @@ where
 
     // FIXME: create a function "display_if_not_quiet" or something along the line.
     println!("[TEST] rustc {test_type} test suite");
-    env.insert("COMPILETEST_FORCE_STAGE0".to_string(), "1".to_string());
 
     let extra =
         if args.is_using_gcc_master_branch() { "" } else { " -Csymbol-mangling-version=v0" };
@@ -1070,6 +1069,8 @@ where
             &"always",
             &"--stage",
             &"0",
+            &"--set",
+            &"build.compiletest-allow-stage0=true",
             &format!("tests/{test_type}"),
             &"--compiletest-rustc-args",
             &rustc_args,