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Auto merge of #96737 - ChrisDenton:win-manifest, r=wesleywiser

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Add Windows application manifest to rustc-main

Windows allows setting some runtime options using a manifest file. The format of the XML file is documented here: https://docs.microsoft.com/en-us/windows/win32/sbscs/application-manifests

The manifest file in this PR does three things:

* Declares which Windows versions we support. This may help avoid unnecessary compatibility shims.
* Uses the UTF-8 code page. While Rust itself uses UTF-16 APIs, other code may rely on the code page.
* Makes the application long path aware (if also enabled by the user). This allows for the current directory to be longer than `PATH_MAX`.

These changes only affect the `rustc` process and not any other DLLs or compiled programs.
This commit is contained in:
bors 2022-06-02 07:58:29 +00:00
commit 5e6bb83268
2 changed files with 52 additions and 0 deletions
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28
compiler/rustc/Windows Manifest.xml Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--
This is a Windows application manifest file.
See: https://docs.microsoft.com/en-us/windows/win32/sbscs/application-manifests
-->
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">
<!-- Versions rustc supports as compiler hosts -->
<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
<application>
<!-- Windows 7 --><supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
<!-- Windows 8 --><supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
<!-- Windows 8.1 --><supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
<!-- Windows 10 and 11 --><supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
</application>
</compatibility>
<!-- Use UTF-8 code page -->
<asmv3:application>
<asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">
<activeCodePage>UTF-8</activeCodePage>
</asmv3:windowsSettings>
</asmv3:application>
<!-- Remove (most) legacy path limits -->
<asmv3:application>
<asmv3:windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
<ws2:longPathAware>true</ws2:longPathAware>
</asmv3:windowsSettings>
</asmv3:application>
</assembly>

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compiler/rustc/build.rs Normal file
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use std::env;
fn main() {
let target_os = env::var("CARGO_CFG_TARGET_OS");
let target_env = env::var("CARGO_CFG_TARGET_ENV");
if Ok("windows") == target_os.as_deref() && Ok("msvc") == target_env.as_deref() {
set_windows_exe_options();
}
}
// Add a manifest file to rustc.exe.
fn set_windows_exe_options() {
static WINDOWS_MANIFEST_FILE: &str = "Windows Manifest.xml";
let mut manifest = env::current_dir().unwrap();
manifest.push(WINDOWS_MANIFEST_FILE);
println!("cargo:rerun-if-changed={}", WINDOWS_MANIFEST_FILE);
// Embed the Windows application manifest file.
println!("cargo:rustc-link-arg-bin=rustc-main=/MANIFEST:EMBED");
println!("cargo:rustc-link-arg-bin=rustc-main=/MANIFESTINPUT:{}", manifest.to_str().unwrap());
// Turn linker warnings into errors.
println!("cargo:rustc-link-arg-bin=rustc-main=/WX");
}