Rollup merge of #127381 - Oneirical:testalt-consciousness, r=jieyouxu

Migrate `issue-83045`, `rustc-macro-dep-files` and `env-dep-info` `run-make` tests to rmake

Part of #121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

Please try on musl.

try-job: dist-x86_64-musl

src/tools/run-make-support/src/rustc.rs

@@ -4,13 +4,15 @@ use std::path::Path;
 
 use crate::{command, cwd, env_var, set_host_rpath};
 
-/// Construct a new `rustc` invocation.
+/// Construct a new `rustc` invocation. This will automatically set the library
+/// search path as `-L cwd()`. Use [`bare_rustc`] to avoid this.
 #[track_caller]
 pub fn rustc() -> Rustc {
     Rustc::new()
 }
 
-/// Construct a plain `rustc` invocation with no flags set.
+/// Construct a plain `rustc` invocation with no flags set. Note that [`set_host_rpath`]
+/// still presets the environment variable `HOST_RPATH_DIR` by default.
 #[track_caller]
 pub fn bare_rustc() -> Rustc {
     Rustc::bare()
@@ -42,7 +44,8 @@ fn setup_common() -> Command {
 impl Rustc {
     // `rustc` invocation constructor methods
 
-    /// Construct a new `rustc` invocation.
+    /// Construct a new `rustc` invocation. This will automatically set the library
+    /// search path as `-L cwd()`. Use [`bare_rustc`] to avoid this.
     #[track_caller]
     pub fn new() -> Self {
         let mut cmd = setup_common();

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -23,7 +23,6 @@ run-make/dep-info/Makefile
 run-make/dump-ice-to-disk/Makefile
 run-make/dump-mono-stats/Makefile
 run-make/emit-to-stdout/Makefile
-run-make/env-dep-info/Makefile
 run-make/export-executable-symbols/Makefile
 run-make/extern-diff-internal-name/Makefile
 run-make/extern-flag-disambiguates/Makefile
@@ -57,7 +56,6 @@ run-make/issue-35164/Makefile
 run-make/issue-36710/Makefile
 run-make/issue-47551/Makefile
 run-make/issue-69368/Makefile
-run-make/issue-83045/Makefile
 run-make/issue-84395-lto-embed-bitcode/Makefile
 run-make/issue-85401-static-mir/Makefile
 run-make/issue-88756-default-output/Makefile
@@ -114,7 +112,6 @@ run-make/return-non-c-like-enum-from-c/Makefile
 run-make/rlib-format-packed-bundled-libs-2/Makefile
 run-make/rlib-format-packed-bundled-libs-3/Makefile
 run-make/rlib-format-packed-bundled-libs/Makefile
-run-make/rustc-macro-dep-files/Makefile
 run-make/sanitizer-cdylib-link/Makefile
 run-make/sanitizer-dylib-link/Makefile
 run-make/sanitizer-staticlib-link/Makefile

tests/run-make/env-dep-info/correct_macro.d

@@ -0,0 +1,6 @@
+macro_use.d: macro_use.rs
+
+macro_use.rs:
+
+# env-dep:EXISTING_PROC_MACRO_ENV=1
+# env-dep:NONEXISTENT_PROC_MACEO_ENV

tests/run-make/env-dep-info/correct_main.d

@@ -0,0 +1,8 @@
+main.d: main.rs
+
+main.rs:
+
+# env-dep:ESCAPE\nESCAPE\\
+# env-dep:EXISTING_ENV=1
+# env-dep:EXISTING_OPT_ENV=1
+# env-dep:NONEXISTENT_OPT_ENV

tests/run-make/env-dep-info/rmake.rs

@@ -0,0 +1,21 @@
+// Inside dep-info emit files, #71858 made it so all accessed environment
+// variables are usefully printed. This test checks that this feature works
+// as intended by checking if the environment variables used in compilation
+// appear in the output dep-info files.
+// See https://github.com/rust-lang/rust/issues/40364
+
+use run_make_support::{diff, rustc};
+
+fn main() {
+    rustc()
+        .env("EXISTING_ENV", "1")
+        .env("EXISTING_OPT_ENV", "1")
+        .emit("dep-info")
+        .input("main.rs")
+        .run();
+    diff().expected_file("correct_main.d").actual_file("main.d").run();
+    // Procedural macro
+    rustc().input("macro_def.rs").run();
+    rustc().env("EXISTING_PROC_MACRO_ENV", "1").emit("dep-info").input("macro_use.rs").run();
+    diff().expected_file("correct_macro.d").actual_file("macro_use.d").run();
+}

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

@@ -0,0 +1,38 @@
+// This test case creates a situation where the crate loader would run
+// into an ICE (internal compiler error) when confronted with an invalid setup where it cannot
+// find the dependency of a direct dependency.
+//
+// The test case makes sure that the compiler produces the expected
+// error message but does not ICE immediately after.
+//
+// See https://github.com/rust-lang/rust/issues/83045
+
+//@ only-x86_64
+//@ only-linux
+// Reason: This is a platform-independent issue, no need to waste time testing
+// everywhere.
+
+// NOTE: We use `bare_rustc` below so that the compiler can't find liba.rlib
+//       If we used `rustc` the additional '-L rmake_out' option would allow rustc to
+//       actually find the crate.
+
+use run_make_support::{bare_rustc, fs_wrapper, rust_lib_name, rustc};
+
+fn main() {
+    rustc().crate_name("a").crate_type("rlib").input("a.rs").arg("--verbose").run();
+    rustc()
+        .crate_name("b")
+        .crate_type("rlib")
+        .extern_("a", rust_lib_name("a"))
+        .input("b.rs")
+        .arg("--verbose")
+        .run();
+    bare_rustc()
+        .extern_("b", rust_lib_name("b"))
+        .crate_type("rlib")
+        .edition("2018")
+        .input("c.rs")
+        .run_fail()
+        .assert_stderr_contains("E0463")
+        .assert_stderr_not_contains("internal compiler error");
+}

tests/run-make/rustc-macro-dep-files/correct.d

@@ -0,0 +1,3 @@
+bar.d: bar.rs
+
+bar.rs:

tests/run-make/rustc-macro-dep-files/rmake.rs

@@ -0,0 +1,14 @@
+// --emit dep-info used to print all macro-generated code it could
+// find as if it was part of a nonexistent file named "proc-macro source",
+// which is not a valid path. After this was fixed in #36776, this test checks
+// that macro code is not falsely seen as coming from a different file in dep-info.
+// See https://github.com/rust-lang/rust/issues/36625
+
+use run_make_support::{diff, rustc, target};
+
+fn main() {
+    rustc().input("foo.rs").run();
+    rustc().input("bar.rs").target(target()).emit("dep-info").run();
+    // The emitted file should not contain "proc-macro source".
+    diff().expected_file("correct.d").actual_file("bar.d").run();
+}