c0e003d5ad
Implements remaining part of RFC #47. Addresses issue #16461. Removed link_attrs from rust.md, they don't appear to be supported by the parser. Changed all the tests to use the new extern crate syntax Change pretty printer to use 'as' syntax
39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-windows
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// ignore-android
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// ignore-macos
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// aux-build:linkage1.rs
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#![feature(linkage)]
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extern crate "linkage1" as other;
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extern {
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#[linkage = "extern_weak"]
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static foo: *const int;
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#[linkage = "extern_weak"]
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static something_that_should_never_exist: *mut int;
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}
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fn main() {
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// It appears that the --as-needed flag to linkers will not pull in a dynamic
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// library unless it satisfies a non weak undefined symbol. The 'other' crate
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// is compiled as a dynamic library where it would only be used for a
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// weak-symbol as part of an executable, so the dynamic library would be
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// discarded. By adding and calling `other::bar`, we get around this problem.
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other::bar();
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assert!(!foo.is_null());
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assert_eq!(unsafe { *foo }, 3);
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assert!(something_that_should_never_exist.is_null());
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}
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