Update run-make test

tests/run-make/linker-warning/bar.rs

@@ -0,0 +1,2 @@
+#[repr(C)]
+pub struct Bar(u32);

tests/run-make/linker-warning/foo.rs

@@ -0,0 +1,2 @@
+#[repr(C)]
+pub struct Foo(u32);

tests/run-make/linker-warning/main.rs

@@ -1 +1,10 @@
-fn main() {}
+unsafe extern "C" {
+    #[cfg(only_foo)]
+    fn does_not_exist(p: *const u8) -> *const foo::Foo;
+    #[cfg(not(only_foo))]
+    fn does_not_exist(p: *const bar::Bar) -> *const foo::Foo;
+}
+
+fn main() {
+    let _ = unsafe { does_not_exist(core::ptr::null()) };
+}

tests/run-make/linker-warning/rmake.rs

@@ -11,6 +11,7 @@ fn run_rustc() -> Rustc {
         .arg("-Clink-self-contained=-linker")
         .arg("-Zunstable-options")
         .arg("-Wlinker-messages")
+        .args(["--extern", "foo", "--extern", "bar"])
         .output("main")
         .linker("./fake-linker");
     if run_make_support::target() == "x86_64-unknown-linux-gnu" {
@@ -21,8 +22,10 @@ fn run_rustc() -> Rustc {
 }
 
 fn main() {
-    // first, compile our linker
+    // first, compile our linker and our dependencies
     rustc().arg("fake-linker.rs").output("fake-linker").run();
+    rustc().arg("foo.rs").crate_type("rlib").run();
+    rustc().arg("bar.rs").crate_type("rlib").run();
 
     // Run rustc with our fake linker, and make sure it shows warnings
     let warnings = run_rustc().link_arg("run_make_warn").run();
@@ -48,7 +51,8 @@ fn main() {
     let out = run_rustc().link_arg("run_make_error").run_fail();
     out.assert_stderr_contains("fake-linker")
         .assert_stderr_contains("object files omitted")
-        .assert_stderr_contains_regex(r"\{")
+        .assert_stderr_contains("/{libfoo,libbar}.rlib\"")
+        .assert_stderr_contains("-*}.rlib\"")
         .assert_stderr_not_contains(r".rcgu.o")
         .assert_stderr_not_contains_regex(r"lib(/|\\\\)libstd");
 
@@ -68,6 +72,10 @@ fn main() {
             .run();
     }
 
+    // Make sure a single dependency doesn't use brace expansion.
+    let out1 = run_rustc().cfg("only_foo").link_arg("run_make_error").run_fail();
+    out1.assert_stderr_contains("fake-linker").assert_stderr_contains("/libfoo.rlib\"");
+
     // Make sure we show linker warnings even across `-Z no-link`
     rustc()
         .arg("-Zno-link")

tests/run-make/linker-warning/short-error.txt

@@ -1,6 +1,6 @@
 error: linking with `./fake-linker` failed: exit status: 1
   |
-  = note:  "./fake-linker" "-m64" "/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/raw-dylibs" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/build-root/test/run-make/linker-warning/rmake_out" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "main" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs" "run_make_error"
+  = note:  "./fake-linker" "-m64" "/symbols.o" "<2 object files omitted>" "-Wl,--as-needed" "-Wl,-Bstatic" "/build-root/test/run-make/linker-warning/rmake_out/{libfoo,libbar}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/{libstd-*,libpanic_unwind-*,libobject-*,libmemchr-*,libaddr2line-*,libgimli-*,librustc_demangle-*,libstd_detect-*,libhashbrown-*,librustc_std_workspace_alloc-*,libminiz_oxide-*,libadler2-*,libunwind-*,libcfg_if-*,liblibc-*,librustc_std_workspace_core-*,liballoc-*,libcore-*,libcompiler_builtins-*}.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/raw-dylibs" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/build-root/test/run-make/linker-warning/rmake_out" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "main" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-nodefaultlibs" "run_make_error"
   = note: some arguments are omitted. use `--verbose` to show all linker arguments
   = note: error: baz