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// Ensure that crates compiled with different rustc versions cannot
// be dynamically linked.
//@ ignore-cross-compile
//@ only-unix
use run_make_support::{diff, dynamic_lib_name, is_darwin, llvm, run, run_fail, rustc};
fn llvm_readobj() -> llvm::LlvmReadobj {
let mut cmd = llvm::llvm_readobj();
if is_darwin() {
cmd.symbols();
} else {
cmd.dynamic_table();
}
cmd
}
fn main() {
let flags = ["-Cprefer-dynamic", "-Csymbol-mangling-version=v0"];
// a.rs is compiled to a dylib
rustc().input("a.rs").crate_type("dylib").args(&flags).run();
// Store symbols
let symbols_before = llvm_readobj().arg(dynamic_lib_name("a")).run().stdout_utf8();
// b.rs is compiled to a binary
rustc()
.input("b.rs")
.extern_("a", dynamic_lib_name("a"))
.crate_type("bin")
.arg("-Crpath")
.args(&flags)
.run();
run("b");
// Now re-compile a.rs with another rustc version
rustc()
.env("RUSTC_FORCE_RUSTC_VERSION", "deadfeed")
.input("a.rs")
.crate_type("dylib")
.args(&flags)
.run();
// After compiling with a different rustc version, store symbols again.
let symbols_after = llvm_readobj().arg(dynamic_lib_name("a")).run().stdout_utf8();
// As a sanity check, test if the symbols changed:
// If the symbols are identical, there's been an error.
diff()
.expected_text("symbols_before", symbols_before)
.actual_text("symbols_after", symbols_after)
.run_fail();
run_fail("b");
}
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