crosvm/tpm2-sys/build.rs
Dennis Kempin acc162000f Add conditional compilation for unix-only crates
Instead of configuring which crates to --exclude in
test_config.py, we can use conditional compilation to
exclude code that is not supported on windows.

This allows more fine-grained control and also allows
us to use plain cargo for building without complicated
configuration and exclusions.

BUG=b:265829867
TEST=cargo test --lib --bins --workspace
	--target=x86_64-pc-windows-gnu
	--features=all-mingw64

Change-Id: I8422c3f08053bc27d9896b220876a56bd25543d6
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4165868
Reviewed-by: Vikram Auradkar <auradkar@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
2023-01-19 21:21:59 +00:00

91 lines
2.5 KiB
Rust

// Copyright 2019 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use std::env;
use std::path::Path;
use std::path::PathBuf;
use std::process::Command;
use anyhow::bail;
use anyhow::Result;
/// Returns the target triplet prefix for gcc commands. No prefix is required
/// for native builds.
fn get_cross_compile_prefix() -> String {
let target = env::var("TARGET").unwrap();
if env::var("HOST").unwrap() == target {
return String::from("");
}
let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
let os = env::var("CARGO_CFG_TARGET_OS").unwrap();
let env = if target.ends_with("-gnueabihf") {
String::from("gnueabihf")
} else {
env::var("CARGO_CFG_TARGET_ENV").unwrap()
};
format!("{}-{}-{}-", arch, os, env)
}
fn build_libtpm2(out_dir: &Path) -> Result<()> {
let lib_path = out_dir.join("libtpm2.a");
if lib_path.exists() {
return Ok(());
}
if !Path::new("libtpm2/.git").exists() {
bail!(
"tpm2-sys/libtpm2 source does not exist, did you forget to \
`git submodule update --init`?"
);
}
let make_flags = env::var("CARGO_MAKEFLAGS").unwrap();
let prefix = get_cross_compile_prefix();
let status = Command::new("make")
.env("MAKEFLAGS", make_flags)
.arg(format!("AR={}ar", prefix))
.arg(format!("CC={}gcc", prefix))
.arg(format!("OBJCOPY={}objcopy", prefix))
.arg("CFLAGS=-Wno-error")
.arg(format!("obj={}", out_dir.display()))
.current_dir("libtpm2")
.status()?;
if !status.success() {
bail!("make failed with status: {}", status);
}
Ok(())
}
fn main() -> Result<()> {
// Skip installing dependencies when generating documents.
if std::env::var("CARGO_DOC").is_ok() {
return Ok(());
}
// libtpm2 is unix only
if std::env::var("CARGO_CFG_UNIX").is_err() {
return Ok(());
}
// Use tpm2 package from the standard system location if available.
if pkg_config::Config::new()
.statik(true)
.probe("libtpm2")
.is_ok()
{
return Ok(());
}
// Otherwise build from source
let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
build_libtpm2(&out_dir)?;
println!("cargo:rustc-link-search={}", out_dir.display());
println!("cargo:rustc-link-lib=static=tpm2");
println!("cargo:rustc-link-lib=ssl");
println!("cargo:rustc-link-lib=crypto");
Ok(())
}