1 files changed, 12 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/src/lib.rs b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/src/lib.rs
index b2a907c736..0626f04e0f 100644
--- a/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/src/lib.rs
+++ b/test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/src/lib.rs
@@ -21,6 +21,18 @@ unsafe extern "C" fn pub_reverse(_klass: VALUE, mut input: VALUE) -> VALUE {
     rb_utf8_str_new(reversed_cstring.as_ptr(), size)
 }
 
+#[cfg(rubygems)]
+#[no_mangle]
+pub extern "C" fn hello_from_rubygems() {}
+
+#[cfg(rubygems_0_0_0)]
+#[no_mangle]
+pub extern "C" fn should_never_exist() {}
+
+#[cfg(rubygems_x_x_x)]
+#[no_mangle]
+pub extern "C" fn hello_from_rubygems_version() {}
+
 #[allow(non_snake_case)]
 #[no_mangle]
 pub extern "C" fn Init_rust_ruby_example() {