rust/src/test/run-pass/issues/issue-18804/main.rs

// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// run-pass
// Test for issue #18804, #[linkage] does not propagate through generic
// functions. Failure results in a linker error.

// ignore-asmjs no weak symbol support
// ignore-emscripten no weak symbol support
// ignore-windows no extern_weak linkage
// ignore-macos no extern_weak linkage

// aux-build:lib.rs

// rust-lang/rust#56772: nikic says we need this to be proper test.
// compile-flags: -C no-prepopulate-passes

extern crate lib;

fn main() {
    lib::foo::<i32>();
}