Rollup merge of #127621 - Oneirical:hypnotest-show, r=jieyouxu

Rewrite and rename `issue-22131` and `issue-26006` `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:

try-job: x86_64-msvc
try-job: i686-mingw

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -38,8 +38,6 @@ run-make/interdependent-c-libraries/Makefile
 run-make/issue-107094/Makefile
 run-make/issue-14698/Makefile
 run-make/issue-15460/Makefile
-run-make/issue-22131/Makefile
-run-make/issue-26006/Makefile
 run-make/issue-28595/Makefile
 run-make/issue-33329/Makefile
 run-make/issue-35164/Makefile

tests/run-make/invalid-symlink-search-path/in/bar/lib.rs

@@ -0,0 +1,5 @@
+extern crate foo;
+
+pub fn main() {
+    let _ = foo::hello_world();
+}

tests/run-make/invalid-symlink-search-path/in/foo/lib.rs

@@ -0,0 +1,3 @@
+pub fn hello_world() -> i32 {
+    42
+}

tests/run-make/invalid-symlink-search-path/rmake.rs

@@ -0,0 +1,33 @@
+// In this test, the symlink created is invalid (valid relative to the root, but not
+// relatively to where it is located), and used to cause an internal
+// compiler error (ICE) when passed as a library search path. This was fixed in #26044,
+// and this test checks that the invalid symlink is instead simply ignored.
+// See https://github.com/rust-lang/rust/issues/26006
+
+//@ needs-symlink
+//Reason: symlink requires elevated permission in Windows
+
+use run_make_support::{rfs, rustc};
+
+fn main() {
+    // We create two libs: `bar` which depends on `foo`. We need to compile `foo` first.
+    rfs::create_dir("out");
+    rfs::create_dir("out/foo");
+    rustc()
+        .input("in/foo/lib.rs")
+        .crate_name("foo")
+        .crate_type("lib")
+        .metadata("foo")
+        .output("out/foo/libfoo.rlib")
+        .run();
+    rfs::create_dir("out/bar");
+    rfs::create_dir("out/bar/deps");
+    rfs::create_symlink("out/foo/libfoo.rlib", "out/bar/deps/libfoo.rlib");
+    // Check that the invalid symlink does not cause an ICE
+    rustc()
+        .input("in/bar/lib.rs")
+        .library_search_path("dependency=out/bar/deps")
+        .run_fail()
+        .assert_exit_code(1)
+        .assert_stderr_not_contains("internal compiler error");
+}

tests/run-make/issue-22131/Makefile

@@ -1,8 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-all: foo.rs
-	$(RUSTC) --cfg 'feature="bar"' --crate-type lib foo.rs
-	$(RUSTDOC) --test --cfg 'feature="bar"' \
-		-L $(TMPDIR) foo.rs |\
-		$(CGREP) 'foo.rs - foo (line 1) ... ok'

tests/run-make/issue-26006/Makefile

@@ -1,17 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-# ignore-windows
-
-OUT := $(TMPDIR)/out
-
-all: time
-
-time: libc
-	mkdir -p $(OUT)/time $(OUT)/time/deps
-	ln -sf $(OUT)/libc/liblibc.rlib $(OUT)/time/deps/
-	$(RUSTC) in/time/lib.rs -Ldependency=$(OUT)/time/deps/
-
-libc:
-	mkdir -p $(OUT)/libc
-	$(RUSTC) in/libc/lib.rs --crate-name=libc -Cmetadata=foo -o $(OUT)/libc/liblibc.rlib

tests/run-make/issue-26006/in/libc/lib.rs

@@ -1,3 +0,0 @@
-#![crate_type = "rlib"]
-
-pub fn something() {}

tests/run-make/issue-26006/in/time/lib.rs

@@ -1,4 +0,0 @@
-#![feature(rustc_private)]
-extern crate libc;
-
-fn main() {}

tests/run-make/rustdoc-cfgspec-parsing/rmake.rs

@@ -0,0 +1,21 @@
+// A rustdoc bug caused the `feature=bar` syntax for the cfg flag to be interpreted
+// wrongly, with `feature=bar` instead of just `bar` being understood as the feature name.
+// After this was fixed in #22135, this test checks that this bug does not make a resurgence.
+// See https://github.com/rust-lang/rust/issues/22131
+
+//@ ignore-cross-compile
+// Reason: rustdoc fails to find the "foo" crate
+
+use run_make_support::{cwd, rustc, rustdoc};
+
+fn main() {
+    rustc().cfg(r#"feature="bar""#).crate_type("lib").input("foo.rs").run();
+    rustdoc()
+        .arg("--test")
+        .arg("--cfg")
+        .arg(r#"feature="bar""#)
+        .library_search_path(cwd())
+        .input("foo.rs")
+        .run()
+        .assert_stdout_contains("foo.rs - foo (line 1) ... ok");
+}