Use raw-dylib for windows-sys (#1137)

* Use raw-dylib for windows-sys

To avoid having to declare `#[link(name = "...")]`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Update windows_targets.rs

Co-authored-by: Chris Denton <chris@chrisdenton.dev>

---------

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
Co-authored-by: Chris Denton <chris@chrisdenton.dev>

dev-tools/gen-windows-sys-binding/Cargo.toml

@@ -7,4 +7,3 @@ publish = false
 [dependencies]
 windows-bindgen = "0.58"
 tempfile = "3"
-regex = "1"

dev-tools/gen-windows-sys-binding/src/main.rs

@@ -6,8 +6,6 @@ use std::{
     io::{BufWriter, Write as _},
 };
 
-use regex::Regex;
-
 /// This is printed to the file before the rest of the contents.
 const PRELUDE: &str = r#"// This file is autogenerated.
 //
@@ -60,27 +58,6 @@ fn main() {
 
     write!(&mut f, "{PRELUDE}\n{bindings}\n").unwrap();
 
-    let mut dll_names: Vec<&str> = Regex::new(r#"link!\("(.*)\.dll""#)
-        .unwrap()
-        .captures_iter(&bindings)
-        .map(|caps| caps.extract().1)
-        .map(|[dll_name]| dll_name)
-        .filter(|dll_name| *dll_name != "kernel32")
-        .collect();
-
-    if !dll_names.is_empty() {
-        dll_names.sort_unstable();
-        dll_names.dedup();
-
-        for dll_name in dll_names {
-            write!(&mut f, r#"#[link(name = "{dll_name}")]"#).unwrap();
-            f.write_all("\n".as_bytes()).unwrap();
-        }
-
-        f.write_all(r#"extern "C" {}"#.as_bytes()).unwrap();
-        f.write_all("\n".as_bytes()).unwrap();
-    }
-
     f.write_all(r#"use super::windows_targets;"#.as_bytes())
         .unwrap();
     f.write_all("\n".as_bytes()).unwrap();

src/windows/windows_sys.rs

@@ -114,8 +114,4 @@ pub const WAIT_OBJECT_0: WAIT_EVENT = 0u32;
 pub const WAIT_TIMEOUT: WAIT_EVENT = 258u32;
 pub type WIN32_ERROR = u32;
 
-#[link(name = "advapi32")]
-#[link(name = "ole32")]
-#[link(name = "oleaut32")]
-extern "C" {}
 use super::windows_targets;

src/windows/windows_targets.rs

@@ -9,7 +9,8 @@ macro_rules! link_macro {
         // have in this repo. So instead we always link kernel32.lib and add the rest of the import
         // libraries below by using an empty extern block. This works because extern blocks are not
         // connected to the library given in the #[link] attribute.
-        #[link(name = "kernel32")]
+        #[cfg_attr(not(target_arch = "x86"), link(name = $library, kind = "raw-dylib", modifiers = "+verbatim"))]
+        #[cfg_attr(target_arch = "x86", link(name = $library, kind = "raw-dylib", modifiers = "+verbatim", import_name_type = "undecorated"))]
         extern $abi {
             $(#[link_name=$link_name])?
             pub fn $($function)*;