mozilla-central/third_party/rust/cc/src/windows/find_tools.rs

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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! A helper module to looking for windows-specific tools:
//! 1. On Windows host, probe the Windows Registry if needed;
//! 2. On non-Windows host, check specified environment variables.
#![allow(clippy::upper_case_acronyms)]
use std::process::Command;
use crate::Tool;
use crate::ToolFamily;
const MSVC_FAMILY: ToolFamily = ToolFamily::Msvc { clang_cl: false };
#[derive(Copy, Clone)]
struct TargetArch<'a>(pub &'a str);
impl PartialEq<&str> for TargetArch<'_> {
fn eq(&self, other: &&str) -> bool {
self.0 == *other
}
}
impl<'a> From<TargetArch<'a>> for &'a str {
fn from(target: TargetArch<'a>) -> Self {
target.0
}
}
/// Attempts to find a tool within an MSVC installation using the Windows
/// registry as a point to search from.
///
/// The `target` argument is the target that the tool should work for (e.g.
/// compile or link for) and the `tool` argument is the tool to find (e.g.
/// `cl.exe` or `link.exe`).
///
/// This function will return `None` if the tool could not be found, or it will
/// return `Some(cmd)` which represents a command that's ready to execute the
/// tool with the appropriate environment variables set.
///
/// Note that this function always returns `None` for non-MSVC targets.
pub fn find(target: &str, tool: &str) -> Option<Command> {
find_tool(target, tool).map(|c| c.to_command())
}
/// Similar to the `find` function above, this function will attempt the same
/// operation (finding a MSVC tool in a local install) but instead returns a
/// `Tool` which may be introspected.
pub fn find_tool(target: &str, tool: &str) -> Option<Tool> {
// This logic is all tailored for MSVC, if we're not that then bail out
// early.
if !target.contains("msvc") {
return None;
}
// Split the target to get the arch.
let target = TargetArch(target.split_once('-')?.0);
// Looks like msbuild isn't located in the same location as other tools like
// cl.exe and lib.exe.
if tool.contains("msbuild") {
return impl_::find_msbuild(target);
}
// Looks like devenv isn't located in the same location as other tools like
// cl.exe and lib.exe.
if tool.contains("devenv") {
return impl_::find_devenv(target);
}
// Ok, if we're here, now comes the fun part of the probing. Default shells
// or shells like MSYS aren't really configured to execute `cl.exe` and the
// various compiler tools shipped as part of Visual Studio. Here we try to
// first find the relevant tool, then we also have to be sure to fill in
// environment variables like `LIB`, `INCLUDE`, and `PATH` to ensure that
// the tool is actually usable.
impl_::find_msvc_environment(tool, target)
.or_else(|| impl_::find_msvc_15plus(tool, target))
.or_else(|| impl_::find_msvc_14(tool, target))
.or_else(|| impl_::find_msvc_12(tool, target))
.or_else(|| impl_::find_msvc_11(tool, target))
}
/// A version of Visual Studio
#[derive(Debug, PartialEq, Eq, Copy, Clone)]
#[non_exhaustive]
pub enum VsVers {
/// Visual Studio 12 (2013)
Vs12,
/// Visual Studio 14 (2015)
Vs14,
/// Visual Studio 15 (2017)
Vs15,
/// Visual Studio 16 (2019)
Vs16,
/// Visual Studio 17 (2022)
Vs17,
}
/// Find the most recent installed version of Visual Studio
///
/// This is used by the cmake crate to figure out the correct
/// generator.
pub fn find_vs_version() -> Result<VsVers, String> {
match std::env::var("VisualStudioVersion") {
Ok(version) => match &version[..] {
"17.0" => Ok(VsVers::Vs17),
"16.0" => Ok(VsVers::Vs16),
"15.0" => Ok(VsVers::Vs15),
"14.0" => Ok(VsVers::Vs14),
"12.0" => Ok(VsVers::Vs12),
vers => Err(format!(
"\n\n\
unsupported or unknown VisualStudio version: {}\n\
if another version is installed consider running \
the appropriate vcvars script before building this \
crate\n\
",
vers
)),
},
_ => {
// Check for the presence of a specific registry key
// that indicates visual studio is installed.
if impl_::has_msbuild_version("17.0") {
Ok(VsVers::Vs17)
} else if impl_::has_msbuild_version("16.0") {
Ok(VsVers::Vs16)
} else if impl_::has_msbuild_version("15.0") {
Ok(VsVers::Vs15)
} else if impl_::has_msbuild_version("14.0") {
Ok(VsVers::Vs14)
} else if impl_::has_msbuild_version("12.0") {
Ok(VsVers::Vs12)
} else {
Err(format!(
"\n\n\
couldn't determine visual studio generator\n\
if VisualStudio is installed, however, consider \
running the appropriate vcvars script before building \
this crate\n\
"
))
}
}
}
}
/// Windows Implementation.
#[cfg(windows)]
mod impl_ {
use crate::windows::com;
use crate::windows::registry::{RegistryKey, LOCAL_MACHINE};
use crate::windows::setup_config::SetupConfiguration;
use crate::windows::vs_instances::{VsInstances, VswhereInstance};
use crate::windows::windows_sys::{
FreeLibrary, GetMachineTypeAttributes, GetProcAddress, LoadLibraryA, UserEnabled, HMODULE,
IMAGE_FILE_MACHINE_AMD64, MACHINE_ATTRIBUTES, S_OK,
};
use std::convert::TryFrom;
use std::env;
use std::ffi::OsString;
use std::fs::File;
use std::io::Read;
use std::iter;
use std::mem;
use std::path::{Path, PathBuf};
use std::process::Command;
use std::str::FromStr;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Once;
use super::{TargetArch, MSVC_FAMILY};
use crate::Tool;
struct MsvcTool {
tool: PathBuf,
libs: Vec<PathBuf>,
path: Vec<PathBuf>,
include: Vec<PathBuf>,
}
struct LibraryHandle(HMODULE);
impl LibraryHandle {
fn new(name: &[u8]) -> Option<Self> {
let handle = unsafe { LoadLibraryA(name.as_ptr() as _) };
(!handle.is_null()).then(|| Self(handle))
}
/// Get a function pointer to a function in the library.
/// SAFETY: The caller must ensure that the function signature matches the actual function.
/// The easiest way to do this is to add an entry to windows_sys_no_link.list and use the
/// generated function for `func_signature`.
unsafe fn get_proc_address<F>(&self, name: &[u8]) -> Option<F> {
let symbol = unsafe { GetProcAddress(self.0, name.as_ptr() as _) };
symbol.map(|symbol| unsafe { mem::transmute_copy(&symbol) })
}
}
impl Drop for LibraryHandle {
fn drop(&mut self) {
unsafe { FreeLibrary(self.0) };
}
}
type GetMachineTypeAttributesFuncType =
unsafe extern "system" fn(u16, *mut MACHINE_ATTRIBUTES) -> i32;
const _: () = {
// Ensure that our hand-written signature matches the actual function signature.
// We can't use `GetMachineTypeAttributes` outside of a const scope otherwise we'll end up statically linking to
// it, which will fail to load on older versions of Windows.
let _: GetMachineTypeAttributesFuncType = GetMachineTypeAttributes;
};
fn is_amd64_emulation_supported_inner() -> Option<bool> {
// GetMachineTypeAttributes is only available on Win11 22000+, so dynamically load it.
let kernel32 = LibraryHandle::new(b"kernel32.dll\0")?;
// SAFETY: GetMachineTypeAttributesFuncType is checked to match the real function signature.
let get_machine_type_attributes = unsafe {
kernel32
.get_proc_address::<GetMachineTypeAttributesFuncType>(b"GetMachineTypeAttributes\0")
}?;
let mut attributes = Default::default();
if unsafe { get_machine_type_attributes(IMAGE_FILE_MACHINE_AMD64, &mut attributes) } == S_OK
{
Some((attributes & UserEnabled) != 0)
} else {
Some(false)
}
}
fn is_amd64_emulation_supported() -> bool {
// TODO: Replace with a OnceLock once MSRV is 1.70.
static LOAD_VALUE: Once = Once::new();
static IS_SUPPORTED: AtomicBool = AtomicBool::new(false);
// Using Relaxed ordering since the Once is providing synchronization.
LOAD_VALUE.call_once(|| {
IS_SUPPORTED.store(
is_amd64_emulation_supported_inner().unwrap_or(false),
Ordering::Relaxed,
);
});
IS_SUPPORTED.load(Ordering::Relaxed)
}
impl MsvcTool {
fn new(tool: PathBuf) -> MsvcTool {
MsvcTool {
tool,
libs: Vec::new(),
path: Vec::new(),
include: Vec::new(),
}
}
fn into_tool(self) -> Tool {
let MsvcTool {
tool,
libs,
path,
include,
} = self;
let mut tool = Tool::with_family(tool, MSVC_FAMILY);
add_env(&mut tool, "LIB", libs);
add_env(&mut tool, "PATH", path);
add_env(&mut tool, "INCLUDE", include);
tool
}
}
/// Checks to see if the `VSCMD_ARG_TGT_ARCH` environment variable matches the
/// given target's arch. Returns `None` if the variable does not exist.
fn is_vscmd_target(target: TargetArch<'_>) -> Option<bool> {
let vscmd_arch = env::var("VSCMD_ARG_TGT_ARCH").ok()?;
// Convert the Rust target arch to its VS arch equivalent.
let arch = match target.into() {
"x86_64" => "x64",
"aarch64" | "arm64ec" => "arm64",
"i686" | "i586" => "x86",
"thumbv7a" => "arm",
// An unrecognized arch.
_ => return Some(false),
};
Some(vscmd_arch == arch)
}
/// Attempt to find the tool using environment variables set by vcvars.
pub(super) fn find_msvc_environment(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
// Early return if the environment doesn't contain a VC install.
if env::var_os("VCINSTALLDIR").is_none() {
return None;
}
let vs_install_dir = env::var_os("VSINSTALLDIR")?.into();
// If the vscmd target differs from the requested target then
// attempt to get the tool using the VS install directory.
if is_vscmd_target(target) == Some(false) {
// We will only get here with versions 15+.
tool_from_vs15plus_instance(tool, target, &vs_install_dir)
} else {
// Fallback to simply using the current environment.
env::var_os("PATH")
.and_then(|path| {
env::split_paths(&path)
.map(|p| p.join(tool))
.find(|p| p.exists())
})
.map(|path| Tool::with_family(path, MSVC_FAMILY))
}
}
fn find_msbuild_vs17(target: TargetArch<'_>) -> Option<Tool> {
find_tool_in_vs16plus_path(r"MSBuild\Current\Bin\MSBuild.exe", target, "17")
}
#[allow(bare_trait_objects)]
fn vs16plus_instances(
target: TargetArch<'_>,
version: &'static str,
) -> Box<Iterator<Item = PathBuf>> {
let instances = if let Some(instances) = vs15plus_instances(target) {
instances
} else {
return Box::new(iter::empty());
};
Box::new(instances.into_iter().filter_map(move |instance| {
let installation_name = instance.installation_name()?;
if installation_name.starts_with(&format!("VisualStudio/{}.", version)) {
Some(instance.installation_path()?)
} else if installation_name.starts_with(&format!("VisualStudioPreview/{}.", version)) {
Some(instance.installation_path()?)
} else {
None
}
}))
}
fn find_tool_in_vs16plus_path(
tool: &str,
target: TargetArch<'_>,
version: &'static str,
) -> Option<Tool> {
vs16plus_instances(target, version)
.filter_map(|path| {
let path = path.join(tool);
if !path.is_file() {
return None;
}
let mut tool = Tool::with_family(path, MSVC_FAMILY);
if target == "x86_64" {
tool.env.push(("Platform".into(), "X64".into()));
}
if target == "aarch64" || target == "arm64ec" {
tool.env.push(("Platform".into(), "ARM64".into()));
}
Some(tool)
})
.next()
}
fn find_msbuild_vs16(target: TargetArch<'_>) -> Option<Tool> {
find_tool_in_vs16plus_path(r"MSBuild\Current\Bin\MSBuild.exe", target, "16")
}
// In MSVC 15 (2017) MS once again changed the scheme for locating
// the tooling. Now we must go through some COM interfaces, which
// is super fun for Rust.
//
// Note that much of this logic can be found [online] wrt paths, COM, etc.
//
//
// Returns MSVC 15+ instances (15, 16 right now), the order should be consider undefined.
//
// However, on ARM64 this method doesn't work because VS Installer fails to register COM component on ARM64.
// Hence, as the last resort we try to use vswhere.exe to list available instances.
fn vs15plus_instances(target: TargetArch<'_>) -> Option<VsInstances> {
vs15plus_instances_using_com().or_else(|| vs15plus_instances_using_vswhere(target))
}
fn vs15plus_instances_using_com() -> Option<VsInstances> {
com::initialize().ok()?;
let config = SetupConfiguration::new().ok()?;
let enum_setup_instances = config.enum_all_instances().ok()?;
Some(VsInstances::ComBased(enum_setup_instances))
}
fn vs15plus_instances_using_vswhere(target: TargetArch<'_>) -> Option<VsInstances> {
let program_files_path: PathBuf = env::var("ProgramFiles(x86)")
.or_else(|_| env::var("ProgramFiles"))
.ok()?
.into();
let vswhere_path =
program_files_path.join(r"Microsoft Visual Studio\Installer\vswhere.exe");
if !vswhere_path.exists() {
return None;
}
let tools_arch = match target.into() {
"i586" | "i686" | "x86_64" => Some("x86.x64"),
"arm" | "thumbv7a" => Some("ARM"),
"aarch64" | "arm64ec" => Some("ARM64"),
_ => None,
};
let vswhere_output = Command::new(vswhere_path)
.args(&[
"-latest",
"-products",
"*",
"-requires",
&format!("Microsoft.VisualStudio.Component.VC.Tools.{}", tools_arch?),
"-format",
"text",
"-nologo",
])
.stderr(std::process::Stdio::inherit())
.output()
.ok()?;
let vs_instances =
VsInstances::VswhereBased(VswhereInstance::try_from(&vswhere_output.stdout).ok()?);
Some(vs_instances)
}
// Inspired from official microsoft/vswhere ParseVersionString
// i.e. at most four u16 numbers separated by '.'
fn parse_version(version: &str) -> Option<Vec<u16>> {
version
.split('.')
.map(|chunk| u16::from_str(chunk).ok())
.collect()
}
pub(super) fn find_msvc_15plus(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
let iter = vs15plus_instances(target)?;
iter.into_iter()
.filter_map(|instance| {
let version = parse_version(&instance.installation_version()?)?;
let instance_path = instance.installation_path()?;
let tool = tool_from_vs15plus_instance(tool, target, &instance_path)?;
Some((version, tool))
})
.max_by(|(a_version, _), (b_version, _)| a_version.cmp(b_version))
.map(|(_version, tool)| tool)
}
// While the paths to Visual Studio 2017's devenv and MSBuild could
// potentially be retrieved from the registry, finding them via
// SetupConfiguration has shown to be [more reliable], and is preferred
// according to Microsoft. To help head off potential regressions though,
// we keep the registry method as a fallback option.
//
fn find_tool_in_vs15_path(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
let mut path = match vs15plus_instances(target) {
Some(instances) => instances
.into_iter()
.filter_map(|instance| instance.installation_path())
.map(|path| path.join(tool))
.find(|path| path.is_file()),
None => None,
};
if path.is_none() {
let key = r"SOFTWARE\WOW6432Node\Microsoft\VisualStudio\SxS\VS7";
path = LOCAL_MACHINE
.open(key.as_ref())
.ok()
.and_then(|key| key.query_str("15.0").ok())
.map(|path| PathBuf::from(path).join(tool))
.and_then(|path| if path.is_file() { Some(path) } else { None });
}
path.map(|path| {
let mut tool = Tool::with_family(path, MSVC_FAMILY);
if target == "x86_64" {
tool.env.push(("Platform".into(), "X64".into()));
} else if target == "aarch64" {
tool.env.push(("Platform".into(), "ARM64".into()));
}
tool
})
}
fn tool_from_vs15plus_instance(
tool: &str,
target: TargetArch<'_>,
instance_path: &PathBuf,
) -> Option<Tool> {
let (root_path, bin_path, host_dylib_path, lib_path, alt_lib_path, include_path) =
vs15plus_vc_paths(target, instance_path)?;
let tool_path = bin_path.join(tool);
if !tool_path.exists() {
return None;
};
let mut tool = MsvcTool::new(tool_path);
tool.path.push(bin_path.clone());
tool.path.push(host_dylib_path);
if let Some(alt_lib_path) = alt_lib_path {
tool.libs.push(alt_lib_path);
}
tool.libs.push(lib_path);
tool.include.push(include_path);
if let Some((atl_lib_path, atl_include_path)) = atl_paths(target, &root_path) {
tool.libs.push(atl_lib_path);
tool.include.push(atl_include_path);
}
add_sdks(&mut tool, target)?;
Some(tool.into_tool())
}
fn vs15plus_vc_paths(
target: TargetArch<'_>,
instance_path: &Path,
) -> Option<(PathBuf, PathBuf, PathBuf, PathBuf, Option<PathBuf>, PathBuf)> {
let version = vs15plus_vc_read_version(instance_path)?;
let hosts = match host_arch() {
X86 => &["X86"],
X86_64 => &["X64"],
// Starting with VS 17.4, there is a natively hosted compiler on ARM64:
// On older versions of VS, we use x64 if running under emulation is supported,
// otherwise use x86.
AARCH64 => {
if is_amd64_emulation_supported() {
&["ARM64", "X64", "X86"][..]
} else {
&["ARM64", "X86"]
}
}
_ => return None,
};
let target = lib_subdir(target)?;
// The directory layout here is MSVC/bin/Host$host/$target/
let path = instance_path.join(r"VC\Tools\MSVC").join(version);
// We use the first available host architecture that can build for the target
let (host_path, host) = hosts.iter().find_map(|&x| {
let candidate = path.join("bin").join(format!("Host{}", x));
if candidate.join(target).exists() {
Some((candidate, x))
} else {
None
}
})?;
// This is the path to the toolchain for a particular target, running
// on a given host
let bin_path = host_path.join(target);
// But! we also need PATH to contain the target directory for the host
// architecture, because it contains dlls like mspdb140.dll compiled for
// the host architecture.
let host_dylib_path = host_path.join(host.to_lowercase());
let lib_path = path.join("lib").join(target);
let alt_lib_path = (target == "arm64ec").then(|| path.join("lib").join("arm64ec"));
let include_path = path.join("include");
Some((
path,
bin_path,
host_dylib_path,
lib_path,
alt_lib_path,
include_path,
))
}
fn vs15plus_vc_read_version(dir: &Path) -> Option<String> {
// Try to open the default version file.
let mut version_path: PathBuf =
dir.join(r"VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt");
let mut version_file = if let Ok(f) = File::open(&version_path) {
f
} else {
// If the default doesn't exist, search for other version files.
// These are in the form Microsoft.VCToolsVersion.v143.default.txt
// where `143` is any three decimal digit version number.
// This sorts versions by lexical order and selects the highest version.
let mut version_file = String::new();
version_path.pop();
for file in version_path.read_dir().ok()? {
let name = file.ok()?.file_name();
let name = name.to_str()?;
if name.starts_with("Microsoft.VCToolsVersion.v")
&& name.ends_with(".default.txt")
&& name > &version_file
{
version_file.replace_range(.., name);
}
}
if version_file.is_empty() {
return None;
}
version_path.push(version_file);
File::open(version_path).ok()?
};
// Get the version string from the file we found.
let mut version = String::new();
version_file.read_to_string(&mut version).ok()?;
version.truncate(version.trim_end().len());
Some(version)
}
fn atl_paths(target: TargetArch<'_>, path: &Path) -> Option<(PathBuf, PathBuf)> {
let atl_path = path.join("atlmfc");
let sub = lib_subdir(target)?;
if atl_path.exists() {
Some((atl_path.join("lib").join(sub), atl_path.join("include")))
} else {
None
}
}
// For MSVC 14 we need to find the Universal CRT as well as either
// the Windows 10 SDK or Windows 8.1 SDK.
pub(super) fn find_msvc_14(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
let vcdir = get_vc_dir("14.0")?;
let mut tool = get_tool(tool, &vcdir, target)?;
add_sdks(&mut tool, target)?;
Some(tool.into_tool())
}
fn add_sdks(tool: &mut MsvcTool, target: TargetArch<'_>) -> Option<()> {
let sub = lib_subdir(target)?;
let (ucrt, ucrt_version) = get_ucrt_dir()?;
let host = match host_arch() {
X86 => "x86",
X86_64 => "x64",
AARCH64 => "arm64",
_ => return None,
};
tool.path
.push(ucrt.join("bin").join(&ucrt_version).join(host));
let ucrt_include = ucrt.join("include").join(&ucrt_version);
tool.include.push(ucrt_include.join("ucrt"));
let ucrt_lib = ucrt.join("lib").join(&ucrt_version);
tool.libs.push(ucrt_lib.join("ucrt").join(sub));
if let Some((sdk, version)) = get_sdk10_dir() {
tool.path.push(sdk.join("bin").join(host));
let sdk_lib = sdk.join("lib").join(&version);
tool.libs.push(sdk_lib.join("um").join(sub));
let sdk_include = sdk.join("include").join(&version);
tool.include.push(sdk_include.join("um"));
tool.include.push(sdk_include.join("cppwinrt"));
tool.include.push(sdk_include.join("winrt"));
tool.include.push(sdk_include.join("shared"));
} else if let Some(sdk) = get_sdk81_dir() {
tool.path.push(sdk.join("bin").join(host));
let sdk_lib = sdk.join("lib").join("winv6.3");
tool.libs.push(sdk_lib.join("um").join(sub));
let sdk_include = sdk.join("include");
tool.include.push(sdk_include.join("um"));
tool.include.push(sdk_include.join("winrt"));
tool.include.push(sdk_include.join("shared"));
}
Some(())
}
// For MSVC 12 we need to find the Windows 8.1 SDK.
pub(super) fn find_msvc_12(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
let vcdir = get_vc_dir("12.0")?;
let mut tool = get_tool(tool, &vcdir, target)?;
let sub = lib_subdir(target)?;
let sdk81 = get_sdk81_dir()?;
tool.path.push(sdk81.join("bin").join(sub));
let sdk_lib = sdk81.join("lib").join("winv6.3");
tool.libs.push(sdk_lib.join("um").join(sub));
let sdk_include = sdk81.join("include");
tool.include.push(sdk_include.join("shared"));
tool.include.push(sdk_include.join("um"));
tool.include.push(sdk_include.join("winrt"));
Some(tool.into_tool())
}
// For MSVC 11 we need to find the Windows 8 SDK.
pub(super) fn find_msvc_11(tool: &str, target: TargetArch<'_>) -> Option<Tool> {
let vcdir = get_vc_dir("11.0")?;
let mut tool = get_tool(tool, &vcdir, target)?;
let sub = lib_subdir(target)?;
let sdk8 = get_sdk8_dir()?;
tool.path.push(sdk8.join("bin").join(sub));
let sdk_lib = sdk8.join("lib").join("win8");
tool.libs.push(sdk_lib.join("um").join(sub));
let sdk_include = sdk8.join("include");
tool.include.push(sdk_include.join("shared"));
tool.include.push(sdk_include.join("um"));
tool.include.push(sdk_include.join("winrt"));
Some(tool.into_tool())
}
fn add_env(tool: &mut Tool, env: &str, paths: Vec<PathBuf>) {
let prev = env::var_os(env).unwrap_or(OsString::new());
let prev = env::split_paths(&prev);
let new = paths.into_iter().chain(prev);
tool.env
.push((env.to_string().into(), env::join_paths(new).unwrap()));
}
// Given a possible MSVC installation directory, we look for the linker and
// then add the MSVC library path.
fn get_tool(tool: &str, path: &Path, target: TargetArch<'_>) -> Option<MsvcTool> {
bin_subdir(target)
.into_iter()
.map(|(sub, host)| {
(
path.join("bin").join(sub).join(tool),
path.join("bin").join(host),
)
})
.filter(|(path, _)| path.is_file())
.map(|(path, host)| {
let mut tool = MsvcTool::new(path);
tool.path.push(host);
tool
})
.filter_map(|mut tool| {
let sub = vc_lib_subdir(target)?;
tool.libs.push(path.join("lib").join(sub));
tool.include.push(path.join("include"));
let atlmfc_path = path.join("atlmfc");
if atlmfc_path.exists() {
tool.libs.push(atlmfc_path.join("lib").join(sub));
tool.include.push(atlmfc_path.join("include"));
}
Some(tool)
})
.next()
}
// To find MSVC we look in a specific registry key for the version we are
// trying to find.
fn get_vc_dir(ver: &str) -> Option<PathBuf> {
let key = r"SOFTWARE\Microsoft\VisualStudio\SxS\VC7";
let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
let path = key.query_str(ver).ok()?;
Some(path.into())
}
// To find the Universal CRT we look in a specific registry key for where
// all the Universal CRTs are located and then sort them asciibetically to
// find the newest version. While this sort of sorting isn't ideal, it is
// what vcvars does so that's good enough for us.
//
// Returns a pair of (root, version) for the ucrt dir if found
fn get_ucrt_dir() -> Option<(PathBuf, String)> {
let key = r"SOFTWARE\Microsoft\Windows Kits\Installed Roots";
let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
let root = key.query_str("KitsRoot10").ok()?;
let readdir = Path::new(&root).join("lib").read_dir().ok()?;
let max_libdir = readdir
.filter_map(|dir| dir.ok())
.map(|dir| dir.path())
.filter(|dir| {
dir.components()
.last()
.and_then(|c| c.as_os_str().to_str())
.map(|c| c.starts_with("10.") && dir.join("ucrt").is_dir())
.unwrap_or(false)
})
.max()?;
let version = max_libdir.components().last().unwrap();
let version = version.as_os_str().to_str().unwrap().to_string();
Some((root.into(), version))
}
// Vcvars finds the correct version of the Windows 10 SDK by looking
// for the include `um\Windows.h` because sometimes a given version will
// only have UCRT bits without the rest of the SDK. Since we only care about
// libraries and not includes, we instead look for `um\x64\kernel32.lib`.
// Since the 32-bit and 64-bit libraries are always installed together we
// only need to bother checking x64, making this code a tiny bit simpler.
// Like we do for the Universal CRT, we sort the possibilities
// asciibetically to find the newest one as that is what vcvars does.
// Before doing that, we check the "WindowsSdkDir" and "WindowsSDKVersion"
// environment variables set by vcvars to use the environment sdk version
// if one is already configured.
fn get_sdk10_dir() -> Option<(PathBuf, String)> {
if let (Ok(root), Ok(version)) = (env::var("WindowsSdkDir"), env::var("WindowsSDKVersion"))
{
return Some((root.into(), version.trim_end_matches('\\').to_string()));
}
let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0";
let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
let root = key.query_str("InstallationFolder").ok()?;
let readdir = Path::new(&root).join("lib").read_dir().ok()?;
let mut dirs = readdir
.filter_map(|dir| dir.ok())
.map(|dir| dir.path())
.collect::<Vec<_>>();
dirs.sort();
let dir = dirs
.into_iter()
.rev()
.filter(|dir| dir.join("um").join("x64").join("kernel32.lib").is_file())
.next()?;
let version = dir.components().last().unwrap();
let version = version.as_os_str().to_str().unwrap().to_string();
Some((root.into(), version))
}
// Interestingly there are several subdirectories, `win7` `win8` and
// `winv6.3`. Vcvars seems to only care about `winv6.3` though, so the same
// applies to us. Note that if we were targeting kernel mode drivers
// instead of user mode applications, we would care.
fn get_sdk81_dir() -> Option<PathBuf> {
let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1";
let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
let root = key.query_str("InstallationFolder").ok()?;
Some(root.into())
}
fn get_sdk8_dir() -> Option<PathBuf> {
let key = r"SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.0";
let key = LOCAL_MACHINE.open(key.as_ref()).ok()?;
let root = key.query_str("InstallationFolder").ok()?;
Some(root.into())
}
const PROCESSOR_ARCHITECTURE_INTEL: u16 = 0;
const PROCESSOR_ARCHITECTURE_AMD64: u16 = 9;
const PROCESSOR_ARCHITECTURE_ARM64: u16 = 12;
const X86: u16 = PROCESSOR_ARCHITECTURE_INTEL;
const X86_64: u16 = PROCESSOR_ARCHITECTURE_AMD64;
const AARCH64: u16 = PROCESSOR_ARCHITECTURE_ARM64;
// When choosing the tool to use, we have to choose the one which matches
// the target architecture. Otherwise we end up in situations where someone
// on 32-bit Windows is trying to cross compile to 64-bit and it tries to
// invoke the native 64-bit compiler which won't work.
//
// For the return value of this function, the first member of the tuple is
// the folder of the tool we will be invoking, while the second member is
// the folder of the host toolchain for that tool which is essential when
// using a cross linker. We return a Vec since on x64 there are often two
// linkers that can target the architecture we desire. The 64-bit host
// linker is preferred, and hence first, due to 64-bit allowing it more
// address space to work with and potentially being faster.
fn bin_subdir(target: TargetArch<'_>) -> Vec<(&'static str, &'static str)> {
match (target.into(), host_arch()) {
("i586", X86) | ("i686", X86) => vec![("", "")],
("i586", X86_64) | ("i686", X86_64) => vec![("amd64_x86", "amd64"), ("", "")],
("x86_64", X86) => vec![("x86_amd64", "")],
("x86_64", X86_64) => vec![("amd64", "amd64"), ("x86_amd64", "")],
("arm", X86) | ("thumbv7a", X86) => vec![("x86_arm", "")],
("arm", X86_64) | ("thumbv7a", X86_64) => vec![("amd64_arm", "amd64"), ("x86_arm", "")],
_ => vec![],
}
}
fn lib_subdir(target: TargetArch<'_>) -> Option<&'static str> {
match target.into() {
"i586" | "i686" => Some("x86"),
"x86_64" => Some("x64"),
"arm" | "thumbv7a" => Some("arm"),
"aarch64" | "arm64ec" => Some("arm64"),
_ => None,
}
}
// MSVC's x86 libraries are not in a subfolder
fn vc_lib_subdir(target: TargetArch<'_>) -> Option<&'static str> {
match target.into() {
"i586" | "i686" => Some(""),
"x86_64" => Some("amd64"),
"arm" | "thumbv7a" => Some("arm"),
"aarch64" => Some("arm64"),
_ => None,
}
}
#[allow(bad_style)]
fn host_arch() -> u16 {
type DWORD = u32;
type WORD = u16;
type LPVOID = *mut u8;
type DWORD_PTR = usize;
#[repr(C)]
struct SYSTEM_INFO {
wProcessorArchitecture: WORD,
_wReserved: WORD,
_dwPageSize: DWORD,
_lpMinimumApplicationAddress: LPVOID,
_lpMaximumApplicationAddress: LPVOID,
_dwActiveProcessorMask: DWORD_PTR,
_dwNumberOfProcessors: DWORD,
_dwProcessorType: DWORD,
_dwAllocationGranularity: DWORD,
_wProcessorLevel: WORD,
_wProcessorRevision: WORD,
}
extern "system" {
fn GetNativeSystemInfo(lpSystemInfo: *mut SYSTEM_INFO);
}
unsafe {
let mut info = mem::zeroed();
GetNativeSystemInfo(&mut info);
info.wProcessorArchitecture
}
}
// Given a registry key, look at all the sub keys and find the one which has
// the maximal numeric value.
//
// Returns the name of the maximal key as well as the opened maximal key.
fn max_version(key: &RegistryKey) -> Option<(OsString, RegistryKey)> {
let mut max_vers = 0;
let mut max_key = None;
for subkey in key.iter().filter_map(|k| k.ok()) {
let val = subkey
.to_str()
.and_then(|s| s.trim_left_matches("v").replace('.', "").parse().ok());
let val = match val {
Some(s) => s,
None => continue,
};
if val > max_vers {
if let Ok(k) = key.open(&subkey) {
max_vers = val;
max_key = Some((subkey, k));
}
}
}
max_key
}
pub(super) fn has_msbuild_version(version: &str) -> bool {
match version {
"17.0" => {
find_msbuild_vs17(TargetArch("x86_64")).is_some()
|| find_msbuild_vs17(TargetArch("i686")).is_some()
|| find_msbuild_vs17(TargetArch("aarch64")).is_some()
}
"16.0" => {
find_msbuild_vs16(TargetArch("x86_64")).is_some()
|| find_msbuild_vs16(TargetArch("i686")).is_some()
|| find_msbuild_vs16(TargetArch("aarch64")).is_some()
}
"15.0" => {
find_msbuild_vs15(TargetArch("x86_64")).is_some()
|| find_msbuild_vs15(TargetArch("i686")).is_some()
|| find_msbuild_vs15(TargetArch("aarch64")).is_some()
}
"12.0" | "14.0" => LOCAL_MACHINE
.open(&OsString::from(format!(
"SOFTWARE\\Microsoft\\MSBuild\\ToolsVersions\\{}",
version
)))
.is_ok(),
_ => false,
}
}
pub(super) fn find_devenv(target: TargetArch<'_>) -> Option<Tool> {
find_devenv_vs15(target)
}
fn find_devenv_vs15(target: TargetArch<'_>) -> Option<Tool> {
find_tool_in_vs15_path(r"Common7\IDE\devenv.exe", target)
}
pub(super) fn find_msbuild(target: TargetArch<'_>) -> Option<Tool> {
// VS 15 (2017) changed how to locate msbuild
if let Some(r) = find_msbuild_vs17(target) {
Some(r)
} else if let Some(r) = find_msbuild_vs16(target) {
return Some(r);
} else if let Some(r) = find_msbuild_vs15(target) {
return Some(r);
} else {
find_old_msbuild(target)
}
}
fn find_msbuild_vs15(target: TargetArch<'_>) -> Option<Tool> {
find_tool_in_vs15_path(r"MSBuild\15.0\Bin\MSBuild.exe", target)
}
fn find_old_msbuild(target: TargetArch<'_>) -> Option<Tool> {
let key = r"SOFTWARE\Microsoft\MSBuild\ToolsVersions";
LOCAL_MACHINE
.open(key.as_ref())
.ok()
.and_then(|key| {
max_version(&key).and_then(|(_vers, key)| key.query_str("MSBuildToolsPath").ok())
})
.map(|path| {
let mut path = PathBuf::from(path);
path.push("MSBuild.exe");
let mut tool = Tool::with_family(path, MSVC_FAMILY);
if target == "x86_64" {
tool.env.push(("Platform".into(), "X64".into()));
}
tool
})
}
}
/// Non-Windows Implementation.
#[cfg(not(windows))]
mod impl_ {
use std::{env, ffi::OsString};
use super::{TargetArch, MSVC_FAMILY};
use crate::Tool;
/// Finding msbuild.exe tool under unix system is not currently supported.
/// Maybe can check it using an environment variable looks like `MSBUILD_BIN`.
pub(super) fn find_msbuild(_target: TargetArch<'_>) -> Option<Tool> {
None
}
// Finding devenv.exe tool under unix system is not currently supported.
// Maybe can check it using an environment variable looks like `DEVENV_BIN`.
pub(super) fn find_devenv(_target: TargetArch<'_>) -> Option<Tool> {
None
}
/// Attempt to find the tool using environment variables set by vcvars.
pub(super) fn find_msvc_environment(tool: &str, _target: TargetArch<'_>) -> Option<Tool> {
// Early return if the environment doesn't contain a VC install.
let vc_install_dir = env::var_os("VCINSTALLDIR")?;
let vs_install_dir = env::var_os("VSINSTALLDIR")?;
let get_tool = |install_dir: OsString| {
env::split_paths(&install_dir)
.map(|p| p.join(tool))
.find(|p| p.exists())
.map(|path| Tool::with_family(path.into(), MSVC_FAMILY))
};
// Take the path of tool for the vc install directory.
get_tool(vc_install_dir)
// Take the path of tool for the vs install directory.
.or_else(|| get_tool(vs_install_dir))
// Take the path of tool for the current path environment.
.or_else(|| env::var_os("PATH").and_then(|path| get_tool(path)))
}
pub(super) fn find_msvc_15plus(_tool: &str, _target: TargetArch<'_>) -> Option<Tool> {
None
}
// For MSVC 14 we need to find the Universal CRT as well as either
// the Windows 10 SDK or Windows 8.1 SDK.
pub(super) fn find_msvc_14(_tool: &str, _target: TargetArch<'_>) -> Option<Tool> {
None
}
// For MSVC 12 we need to find the Windows 8.1 SDK.
pub(super) fn find_msvc_12(_tool: &str, _target: TargetArch<'_>) -> Option<Tool> {
None
}
// For MSVC 11 we need to find the Windows 8 SDK.
pub(super) fn find_msvc_11(_tool: &str, _target: TargetArch<'_>) -> Option<Tool> {
None
}
pub(super) fn has_msbuild_version(version: &str) -> bool {
match version {
"17.0" => false,
"16.0" => false,
"15.0" => false,
"12.0" | "14.0" => false,
_ => false,
}
}
}