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Fix linkage1 test which fails due to --as-needed #12983

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Fix linkage1 test which fails due to --as-needed #12983

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2 changes: 2 additions & 0 deletions src/test/auxiliary/linkage1.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,3 +10,5 @@

#[no_mangle]
pub static foo: int = 3;

pub fn bar() {}
7 changes: 7 additions & 0 deletions src/test/run-pass/linkage1.rs
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Expand Up @@ -26,6 +26,13 @@ extern {
}

fn main() {
// It appears that the --as-needed flag to linkers will not pull in a dynamic
// library unless it satisfies a non weak undefined symbol. The 'other' crate
// is compiled as a dynamic library where it would only be used for a
// weak-symbol as part of an executable, so the dynamic library woudl be
// discarded. By adding and calling `other::bar`, we get around this problem.
other::bar();

assert!(!foo.is_null());
assert_eq!(unsafe { *foo }, 3);
assert!(something_that_should_never_exist.is_null());
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