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-rw-r--r--tests/run-make/export/extern-opt/libinterface.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/run-make/export/extern-opt/libinterface.rs b/tests/run-make/export/extern-opt/libinterface.rs
new file mode 100644
index 00000000000..313cfbe7d59
--- /dev/null
+++ b/tests/run-make/export/extern-opt/libinterface.rs
@@ -0,0 +1,4 @@
+#![feature(export_stable)]
+
+#[export_stable]
+pub extern "C" fn foo(x: i32) -> i32;