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//! This is a regression test for #129020
//! It ensures we can use `/WHOLEARCHIVE` to link a rust staticlib into DLL
//! using the MSVC linker
//@ only-msvc
// Reason: this is testing the MSVC linker
use std::path::PathBuf;
use run_make_support::{cc, cmd, env_var, extra_c_flags, rustc};
fn main() {
// Build the staticlib
rustc().crate_type("staticlib").input("static.rs").output("static.lib").run();
// Build an empty object to pass to the linker.
cc().input("c.c").output("c.obj").args(["-c"]).run();
// Find the C toolchain's linker.
let mut linker = PathBuf::from(env_var("CC"));
let linker_flavour = if linker.file_stem().is_some_and(|s| s == "cl") {
linker.set_file_name("link.exe");
"msvc"
} else if linker.file_stem().is_some_and(|s| s == "clang-cl") {
linker.set_file_name("lld-link.exe");
"llvm"
} else {
panic!("unknown C toolchain");
};
// As a sanity check, make sure this works without /WHOLEARCHIVE.
// Otherwise the actual test failure may be caused by something else.
cmd(&linker)
.args(["c.obj", "./static.lib", "-dll", "-def:dll.def", "-out:dll.dll"])
.args(extra_c_flags())
.run();
// FIXME(@ChrisDenton): this doesn't currently work with llvm's lld-link for other reasons.
// May need LLVM patches.
if linker_flavour == "msvc" {
// Link in the staticlib using `/WHOLEARCHIVE` and produce a DLL.
cmd(&linker)
.args([
"c.obj",
"-WHOLEARCHIVE:./static.lib",
"-dll",
"-def:dll.def",
"-out:dll_whole_archive.dll",
])
.args(extra_c_flags())
.run();
}
}
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