port symlinked-libraries to rmake

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

@@ -94,14 +94,31 @@ pub fn source_root() -> PathBuf {
 }
 
 /// Creates a new symlink to a path on the filesystem, adjusting for Windows or Unix.
+#[cfg(target_family = "windows")]
 pub fn create_symlink<P: AsRef<Path>, Q: AsRef<Path>>(original: P, link: Q) {
-    if is_windows() {
-        use std::os::windows::fs;
-        fs::symlink_file(original, link).unwrap();
-    } else {
-        use std::os::unix::fs;
-        fs::symlink(original, link).unwrap();
+    if link.as_ref().exists() {
+        std::fs::remove_dir(link.as_ref()).unwrap();
+    }
+    use std::os::windows::fs;
+    fs::symlink_file(original.as_ref(), link.as_ref()).expect(&format!(
+        "failed to create symlink {:?} for {:?}",
+        link.as_ref().display(),
+        original.as_ref().display(),
+    ));
+}
+
+/// Creates a new symlink to a path on the filesystem, adjusting for Windows or Unix.
+#[cfg(target_family = "unix")]
+pub fn create_symlink<P: AsRef<Path>, Q: AsRef<Path>>(original: P, link: Q) {
+    if link.as_ref().exists() {
+        std::fs::remove_dir(link.as_ref()).unwrap();
     }
+    use std::os::unix::fs;
+    fs::symlink(original.as_ref(), link.as_ref()).expect(&format!(
+        "failed to create symlink {:?} for {:?}",
+        link.as_ref().display(),
+        original.as_ref().display(),
+    ));
 }
 
 /// Construct the static library name based on the platform.
@@ -125,11 +142,7 @@ pub fn static_lib_name(name: &str) -> String {
     // ```
     assert!(!name.contains(char::is_whitespace), "static library name cannot contain whitespace");
 
-    if is_msvc() {
-        format!("{name}.lib")
-    } else {
-        format!("lib{name}.a")
-    }
+    if is_msvc() { format!("{name}.lib") } else { format!("lib{name}.a") }
 }
 
 /// Construct the dynamic library name based on the platform.
@@ -176,11 +189,7 @@ pub fn rust_lib_name(name: &str) -> String {
 
 /// Construct the binary name based on platform.
 pub fn bin_name(name: &str) -> String {
-    if is_windows() {
-        format!("{name}.exe")
-    } else {
-        name.to_string()
-    }
+    if is_windows() { format!("{name}.exe") } else { name.to_string() }
 }
 
 /// Return the current working directory.

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -228,7 +228,6 @@ run-make/std-core-cycle/Makefile
 run-make/symbol-mangling-hashed/Makefile
 run-make/symbol-visibility/Makefile
 run-make/symbols-include-type-name/Makefile
-run-make/symlinked-libraries/Makefile
 run-make/sysroot-crates-are-unstable/Makefile
 run-make/target-cpu-native/Makefile
 run-make/target-specs/Makefile

tests/run-make/symlinked-extern/rmake.rs

@@ -10,17 +10,12 @@
 
 //@ ignore-cross-compile
 
-use run_make_support::{create_symlink, rustc, tmp_dir};
-use std::fs;
+use run_make_support::{create_symlink, cwd, fs_wrapper, rustc};
 
 fn main() {
     rustc().input("foo.rs").run();
-    fs::create_dir_all(tmp_dir().join("other")).unwrap();
-    create_symlink(tmp_dir().join("libfoo.rlib"), tmp_dir().join("other"));
-    rustc().input("bar.rs").library_search_path(tmp_dir()).run();
-    rustc()
-        .input("baz.rs")
-        .extern_("foo", tmp_dir().join("other/libfoo.rlib"))
-        .library_search_path(tmp_dir())
-        .run();
+    fs_wrapper::create_dir_all("other");
+    create_symlink("libfoo.rlib", "other");
+    rustc().input("bar.rs").library_search_path(cwd()).run();
+    rustc().input("baz.rs").extern_("foo", "other").library_search_path(cwd()).run();
 }

tests/run-make/symlinked-libraries/rmake.rs

@@ -0,0 +1,16 @@
+// When a directory and a symlink simultaneously exist with the same name,
+// setting that name as the library search path should not cause rustc
+// to avoid looking in the symlink and cause an error. This test creates
+// a directory and a symlink named "other", and places the library in the symlink.
+// If it succeeds, the library was successfully found.
+// See https://github.com/rust-lang/rust/issues/12459
+
+//@ ignore-cross-compile
+use run_make_support::{create_symlink, dynamic_lib_name, fs_wrapper, rustc};
+
+fn main() {
+    rustc().input("foo.rs").arg("-Cprefer-dynamic").run();
+    fs_wrapper::create_dir_all("other");
+    create_symlink(dynamic_lib_name("foo"), "other");
+    rustc().input("bar.rs").library_search_path("other").run();
+}

tests/run-make/symlinked-rlib/rmake.rs

@@ -7,10 +7,10 @@
 
 //@ ignore-cross-compile
 
-use run_make_support::{create_symlink, rustc, tmp_dir};
+use run_make_support::{create_symlink, cwd, rustc};
 
 fn main() {
-    rustc().input("foo.rs").crate_type("rlib").output(tmp_dir().join("foo.xxx")).run();
-    create_symlink(tmp_dir().join("foo.xxx"), tmp_dir().join("libfoo.rlib"));
-    rustc().input("bar.rs").library_search_path(tmp_dir());
+    rustc().input("foo.rs").crate_type("rlib").output("foo.xxx").run();
+    create_symlink("foo.xxx", "libfoo.rlib");
+    rustc().input("bar.rs").library_search_path(cwd()).run();
 }