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extern crate pkg_config;
extern crate gcc;
use std::env;
use std::ffi::OsString;
use std::fs;
use std::path::{Path, PathBuf};
use std::process::Command;
macro_rules! t {
($e:expr) => (match $e {
Ok(n) => n,
Err(e) => panic!("\n{} failed with {}\n", stringify!($e), e),
})
}
fn main() {
let host = env::var("HOST").unwrap();
let target = env::var("TARGET").unwrap();
// Don't run pkg-config if we're linking statically (we'll build below) and
// also don't run pkg-config on OSX. That'll end up printing `-L /usr/lib`
// which wreaks havoc with linking to an OpenSSL in /usr/local/lib (e.g.
// homebrew)
let want_static = env::var("LIBZ_SYS_STATIC").unwrap_or(String::new()) == "1";
if !want_static &&
!(host.contains("apple") && target.contains("apple")) &&
pkg_config::find_library("zlib").is_ok() {
return
}
// Practically all platforms come with libz installed already, but MSVC is
// one of those sole platforms that doesn't!
if target.contains("msvc") {
build_msvc_zlib(&target);
} else if (target.contains("musl") ||
target != host ||
want_static) &&
!target.contains("windows-gnu") &&
!target.contains("android") {
build_zlib();
} else {
println!("cargo:rustc-link-lib=z");
}
}
fn build_zlib() {
let src = env::current_dir().unwrap().join("src/zlib-1.2.8");
let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());
let build = dst.join("build");
t!(fs::create_dir_all(&build));
cp_r(&src, &build);
let compiler = gcc::Config::new().get_compiler();
let mut cflags = OsString::new();
for arg in compiler.args() {
cflags.push(arg);
cflags.push(" ");
}
run(Command::new("./configure")
.current_dir(&build)
.env("CC", compiler.path())
.env("CFLAGS", cflags));
run(Command::new("make")
.current_dir(&build)
.arg("libz.a"));
t!(fs::create_dir_all(dst.join("lib")));
t!(fs::create_dir_all(dst.join("include")));
t!(fs::copy(build.join("libz.a"), dst.join("lib/libz.a")));
t!(fs::copy(build.join("zlib.h"), dst.join("include/zlib.h")));
t!(fs::copy(build.join("zconf.h"), dst.join("include/zconf.h")));
println!("cargo:rustc-link-lib=static=z");
println!("cargo:rustc-link-search={}/lib", dst.to_string_lossy());
println!("cargo:root={}", dst.to_string_lossy());
println!("cargo:include={}/include", dst.to_string_lossy());
}
fn cp_r(dir: &Path, dst: &Path) {
for entry in t!(fs::read_dir(dir)) {
let entry = t!(entry);
let path = entry.path();
let dst = dst.join(path.file_name().unwrap());
if t!(fs::metadata(&path)).is_file() {
t!(fs::copy(path, dst));
} else {
t!(fs::create_dir_all(&dst));
cp_r(&path, &dst);
}
}
}
fn build_msvc_zlib(target: &str) {
let src = t!(env::current_dir()).join("src/zlib-1.2.8");
let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());
t!(fs::create_dir_all(dst.join("lib")));
t!(fs::create_dir_all(dst.join("include")));
t!(fs::create_dir_all(dst.join("build")));
cp_r(&src, &dst.join("build"));
let nmake = gcc::windows_registry::find(target, "nmake.exe");
let mut nmake = nmake.unwrap_or(Command::new("nmake.exe"));
run(nmake.current_dir(dst.join("build"))
.arg("/nologo")
.arg("/f")
.arg(src.join("win32/Makefile.msc"))
.arg("zlib.lib"));
for file in t!(fs::read_dir(&dst.join("build"))) {
let file = t!(file).path();
if let Some(s) = file.file_name().and_then(|s| s.to_str()) {
if s.ends_with(".h") {
t!(fs::copy(&file, dst.join("include").join(s)));
}
}
}
t!(fs::copy(dst.join("build/zlib.lib"), dst.join("lib/zlib.lib")));
println!("cargo:rustc-link-lib=static=zlib");
println!("cargo:rustc-link-search={}/lib", dst.to_string_lossy());
println!("cargo:root={}", dst.to_string_lossy());
println!("cargo:include={}/include", dst.to_string_lossy());
}
fn run(cmd: &mut Command) {
println!("running: {:?}", cmd);
let status = match cmd.status() {
Ok(s) => s,
Err(e) => panic!("failed to run: {}", e),
};
if !status.success() {
panic!("failed to run successfully: {}", status);
}
}
|
