From ae1b1b4f8a9a1cd012cd7db944bbfa2adae703cb Mon Sep 17 00:00:00 2001
From: Jens Reidel <adrian@travitia.xyz>
Date: Tue, 10 Jun 2025 18:36:22 +0200
Subject: [PATCH] tests: Fix duplicated-path-in-error fail with musl

musl's dlopen returns a different error than glibc, which contains the
name of the file. This would cause the test to fail, since the filename
would appear twice in the output (once in the error from rustc, once in
the error message from musl). Split the expected test outputs for the
different libc implementations.

Signed-off-by: Jens Reidel <adrian@travitia.xyz>
---
 src/tools/compiletest/src/directives.rs                    | 1 +
 ...in-error.stderr => duplicated-path-in-error.gnu.stderr} | 0
 tests/ui/codegen/duplicated-path-in-error.musl.stderr      | 2 ++
 tests/ui/codegen/duplicated-path-in-error.rs               | 7 +++++++
 4 files changed, 10 insertions(+)
 rename tests/ui/codegen/{duplicated-path-in-error.stderr => duplicated-path-in-error.gnu.stderr} (100%)
 create mode 100644 tests/ui/codegen/duplicated-path-in-error.musl.stderr

diff --git a/src/tools/compiletest/src/directives.rs b/src/tools/compiletest/src/directives.rs
index 215793fe947f8..e31f8f43e1b98 100644
--- a/src/tools/compiletest/src/directives.rs
+++ b/src/tools/compiletest/src/directives.rs
@@ -973,6 +973,7 @@ const KNOWN_DIRECTIVE_NAMES: &[&str] = &[
     "only-mips64",
     "only-msp430",
     "only-msvc",
+    "only-musl",
     "only-nightly",
     "only-nvptx64",
     "only-powerpc",
diff --git a/tests/ui/codegen/duplicated-path-in-error.stderr b/tests/ui/codegen/duplicated-path-in-error.gnu.stderr
similarity index 100%
rename from tests/ui/codegen/duplicated-path-in-error.stderr
rename to tests/ui/codegen/duplicated-path-in-error.gnu.stderr
diff --git a/tests/ui/codegen/duplicated-path-in-error.musl.stderr b/tests/ui/codegen/duplicated-path-in-error.musl.stderr
new file mode 100644
index 0000000000000..2892ebffdde6a
--- /dev/null
+++ b/tests/ui/codegen/duplicated-path-in-error.musl.stderr
@@ -0,0 +1,2 @@
+error: couldn't load codegen backend /non-existing-one.so: Error loading shared library /non-existing-one.so: No such file or directory
+
diff --git a/tests/ui/codegen/duplicated-path-in-error.rs b/tests/ui/codegen/duplicated-path-in-error.rs
index a446395de208f..fed93828ee2a6 100644
--- a/tests/ui/codegen/duplicated-path-in-error.rs
+++ b/tests/ui/codegen/duplicated-path-in-error.rs
@@ -1,8 +1,15 @@
+//@ revisions: musl gnu
 //@ only-linux
+//@ ignore-cross-compile because this relies on host libc behaviour
 //@ compile-flags: -Zcodegen-backend=/non-existing-one.so
+//@[gnu] only-gnu
+//@[musl] only-musl
 
 // This test ensures that the error of the "not found dylib" doesn't duplicate
 // the path of the dylib.
+//
+// glibc and musl have different dlopen error messages, so the expected error
+// message differs between the two.
 
 fn main() {}