36 lines
1.5 KiB
Rust
36 lines
1.5 KiB
Rust
// Linkers treat archives differently from object files: all object files participate in linking,
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// while archives will only participate in linking if they can satisfy at least one undefined
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// reference (version scripts doesn't count). This causes `#[no_mangle]` or `#[used]` items to
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// be ignored by the linker, and since they never participate in the linking, using `KEEP` in the
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// linker scripts can't keep them either. This causes #47384. After the fix in #95604, this test
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// checks that these symbols and sections successfully appear in the output dynamic library.
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// See https://github.com/rust-lang/rust/pull/95604
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// See https://github.com/rust-lang/rust/issues/47384
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//@ ignore-wasm differences in object file formats causes errors in the llvm_objdump step.
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//@ ignore-windows differences in object file formats causes errors in the llvm_objdump step.
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use run_make_support::{dynamic_lib_name, llvm_objdump, llvm_readobj, rustc, target};
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fn main() {
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rustc().crate_type("lib").input("lib.rs").run();
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let mut main = rustc();
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main.crate_type("cdylib");
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if target().contains("linux") {
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main.link_args("-Tlinker.ld");
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}
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main.input("main.rs").run();
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// Ensure `#[used]` and `KEEP`-ed section is there
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llvm_objdump()
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.arg("--full-contents")
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.arg("--section=.static")
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.input(dynamic_lib_name("main"))
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.run();
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// Ensure `#[no_mangle]` symbol is there
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llvm_readobj()
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.arg("--symbols")
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.input(dynamic_lib_name("main"))
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.run()
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.assert_stdout_contains("bar");
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}
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