rust/tests/codegen/dllimports/main.rs

 // This test is for *-windows-msvc only.
// only-windows
// ignore-gnu

// aux-build:dummy.rs
// aux-build:wrapper.rs

extern crate wrapper;

// Check that external symbols coming from foreign dylibs are adorned with 'dllimport',
// whereas symbols coming from foreign staticlibs are not. (RFC-1717)

// CHECK: @dylib_global1 = external dllimport local_unnamed_addr global i32
// CHECK: @dylib_global2 = external dllimport local_unnamed_addr global i32
// CHECK: @static_global1 = external local_unnamed_addr global i32
// CHECK: @static_global2 = external local_unnamed_addr global i32

// CHECK: declare dllimport noundef i32 @dylib_func1(i32 noundef)
// CHECK: declare dllimport noundef i32 @dylib_func2(i32 noundef)
// CHECK: declare noundef i32 @static_func1(i32 noundef)
// CHECK: declare noundef i32 @static_func2(i32 noundef)

#[link(name = "dummy", kind="dylib")]
extern "C" {
    pub fn dylib_func1(x: i32) -> i32;
    pub static dylib_global1: i32;
}

#[link(name = "dummy", kind="static")]
extern "C" {
    pub fn static_func1(x: i32) -> i32;
    pub static static_global1: i32;
}

fn main() {
    unsafe {
        dylib_func1(dylib_global1);
        wrapper::dylib_func2(wrapper::dylib_global2);

        static_func1(static_global1);
        wrapper::static_func2(wrapper::static_global2);
    }
}