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extern crate pkg_config;
extern crate gcc;
use std::env;
use std::fs::{self, File};
use std::io::prelude::*;
use std::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 args = env::args_os();
// Oh boy! If we're compiling on MSVC, then it turns out this build script
// itself is going to be used as a compiler! Currently the nmake build
// files for libssh2 *always* add the /GL compiler option to compiler
// invocations to enable whole program optimization.
//
// Unfortunately this requires the linker be passed /LTCG as a parameter,
// and we don't currently have a great way of passing that parameter to the
// Rust compiler itself. As such, this script uses itself as a compiler for
// the MSVC code and passes the /GL- option to disable whole program
// optimization, allowing the linker to succeed.
if args.len() > 1 {
let args = args.collect::<Vec<_>>();
assert!(Command::new("cl").args(&args)
.arg("/GL-")
.status().unwrap()
.success());
return
}
if let Ok(lib) = pkg_config::find_library("libssh2") {
for path in &lib.include_paths {
println!("cargo:include={}", path.display());
}
return
}
let mut cflags = env::var("CFLAGS").unwrap_or(String::new());
let target = env::var("TARGET").unwrap();
let windows = target.contains("windows");
cflags.push_str(" -ffunction-sections -fdata-sections");
if target.contains("i686") {
cflags.push_str(" -m32");
} else if target.contains("x86_64") {
cflags.push_str(" -m64");
}
if !target.contains("i686") {
cflags.push_str(" -fPIC");
}
match env::var("DEP_OPENSSL_ROOT") {
Ok(s) => {
cflags.push_str(&format!(" -I{}/include", s));
cflags.push_str(&format!(" -L{}/lib", s));
}
Err(..) => {}
}
let dst = PathBuf::from(&env::var_os("OUT_DIR").unwrap());
let root = t!(env::current_dir()).join("libssh2-1.5.0");
let _ = fs::remove_dir_all(&dst.join("include"));
let _ = fs::remove_dir_all(dst.join("lib"));
let _ = fs::remove_dir_all(dst.join("build"));
t!(fs::create_dir(dst.join("build")));
if !windows {
run(Command::new(root.join("configure"))
.env("CFLAGS", &cflags)
.current_dir(dst.join("build"))
.arg("--enable-shared=no")
.arg("--disable-examples-build")
.arg(format!("--prefix={}", dst.display())));
run(Command::new(&make())
.arg(&format!("-j{}", env::var("NUM_JOBS").unwrap()))
.current_dir(dst.join("build/src")));
run(Command::new(&make())
.arg("install")
.current_dir(dst.join("build/src")));
run(Command::new(&make())
.arg("install-data")
.current_dir(dst.join("build")));
// Unfortunately the pkg-config file generated for libssh2 indicates
// that it depends on zlib, but most systems don't actually have a
// zlib.pc, so pkg-config will say that libssh2 doesn't exist. We
// generally take care of the zlib dependency elsewhere, so we just
// remove that part from the pkg-config file
let mut pc = String::new();
let pkgconfig = dst.join("lib/pkgconfig/libssh2.pc");
t!(t!(File::open(&pkgconfig)).read_to_string(&mut pc));
let pc = pc.replace(",zlib", "");
let bytes = pc.as_bytes();
t!(t!(File::create(pkgconfig)).write_all(bytes));
} else {
t!(fs::create_dir(dst.join("lib")));
if target.contains("msvc") {
let nmake = gcc::windows_registry::find(&target, "nmake.exe");
let mut nmake = nmake.unwrap_or(Command::new("nmake.exe"));
run(nmake.current_dir(&root)
.arg("/nologo")
// see above for why we set CC here
.env("CC", env::current_exe().unwrap())
.env_remove("TARGET")
.arg("/fNMakefile")
.arg("BUILD_STATIC_LIB=1")
.arg("WITH_WINCNG=1"));
t!(fs::copy(root.join("Release/src/libssh2.lib"),
dst.join("lib/libssh2.a")));
t!(fs::remove_dir_all(root.join("Release")));
} else {
run(Command::new("make")
.current_dir(root.join("win32"))
.arg("-fGNUmakefile")
.arg("WITH_WINCNG=1")
.arg("WITH_ZLIB=1")
.arg("lib"));
t!(fs::remove_dir_all(root.join("win32/release")));
t!(fs::copy(root.join("win32/libssh2.a"), dst.join("lib/libssh2.a")));
t!(fs::remove_file(root.join("win32/libssh2.a")));
}
let root = root.join("include");
let dst = dst.join("include");
t!(fs::create_dir_all(&dst));
t!(fs::copy(root.join("libssh2.h"), dst.join("libssh2.h")));
t!(fs::copy(root.join("libssh2_publickey.h"),
dst.join("libssh2_publickey.h")));
t!(fs::copy(root.join("libssh2_sftp.h"), dst.join("libssh2_sftp.h")));
}
if windows {
println!("cargo:rustc-link-lib=ws2_32");
println!("cargo:rustc-link-lib=bcrypt");
println!("cargo:rustc-link-lib=crypt32");
println!("cargo:rustc-link-lib=user32");
}
println!("cargo:rustc-link-search=native={}/lib", dst.display());
println!("cargo:rustc-link-lib=static=ssh2");
println!("cargo:root={}", dst.display());
println!("cargo:include={}/include", dst.display());
}
fn make() -> &'static str {
if cfg!(target_os = "freebsd") {"gmake"} else {"make"}
}
fn run(cmd: &mut Command) {
println!("running: {:?}", cmd);
let status = t!(cmd.status());
if !status.success() {
panic!("command did not succeed, exited with: {}", status);
}
}
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