src/bootstrap/native.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 //! Compilation of native dependencies like LLVM.
  12 //!
  13 //! Native projects like LLVM unfortunately aren't suited just yet for
  14 //! compilation in build scripts that Cargo has. This is because the
  15 //! compilation takes a *very* long time but also because we don't want to
  16 //! compile LLVM 3 times as part of a normal bootstrap (we want it cached).
  17 //!
  18 //! LLVM and compiler-rt are essentially just wired up to everything else to
  19 //! ensure that they're always in place if needed.
  20
  21 use std::env;
  22 use std::ffi::OsString;
  23 use std::fs::{self, File};
  24 use std::io::{Read, Write};
  25 use std::path::{Path, PathBuf};
  26 use std::process::Command;
  27
  28 use build_helper::output;
  29 use cmake;
  30 use cc;
  31
  32 use util::{self, exe};
  33 use build_helper::up_to_date;
  34 use builder::{Builder, RunConfig, ShouldRun, Step};
  35 use cache::Interned;
  36
  37 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
  38 pub struct Llvm {
  39     pub target: Interned<String>,
  40     pub emscripten: bool,
  41 }
  42
  43 impl Step for Llvm {
  44     type Output = PathBuf; // path to llvm-config
  45
  46     const ONLY_HOSTS: bool = true;
  47
  48     fn should_run(run: ShouldRun) -> ShouldRun {
  49         run.path("src/llvm").path("src/llvm-emscripten")
  50     }
  51
  52     fn make_run(run: RunConfig) {
  53         let emscripten = run.path.ends_with("llvm-emscripten");
  54         run.builder.ensure(Llvm {
  55             target: run.target,
  56             emscripten,
  57         });
  58     }
  59
  60     /// Compile LLVM for `target`.
  61     fn run(self, builder: &Builder) -> PathBuf {
  62         let target = self.target;
  63         let emscripten = self.emscripten;
  64
  65         // If we're using a custom LLVM bail out here, but we can only use a
  66         // custom LLVM for the build triple.
  67         if !self.emscripten {
  68             if let Some(config) = builder.config.target_config.get(&target) {
  69                 if let Some(ref s) = config.llvm_config {
  70                     check_llvm_version(builder, s);
  71                     return s.to_path_buf()
  72                 }
  73             }
  74         }
  75
  76         let rebuild_trigger = builder.src.join("src/rustllvm/llvm-rebuild-trigger");
  77         let mut rebuild_trigger_contents = String::new();
  78         t!(t!(File::open(&rebuild_trigger)).read_to_string(&mut rebuild_trigger_contents));
  79
  80         let (out_dir, llvm_config_ret_dir) = if emscripten {
  81             let dir = builder.emscripten_llvm_out(target);
  82             let config_dir = dir.join("bin");
  83             (dir, config_dir)
  84         } else {
  85             let mut dir = builder.llvm_out(builder.config.build);
  86             if !builder.config.build.contains("msvc") || builder.config.ninja {
  87                 dir.push("build");
  88             }
  89             (builder.llvm_out(target), dir.join("bin"))
  90         };
  91         let done_stamp = out_dir.join("llvm-finished-building");
  92         let build_llvm_config = llvm_config_ret_dir
  93             .join(exe("llvm-config", &*builder.config.build));
  94         if done_stamp.exists() {
  95             let mut done_contents = String::new();
  96             t!(t!(File::open(&done_stamp)).read_to_string(&mut done_contents));
  97
  98             // If LLVM was already built previously and contents of the rebuild-trigger file
  99             // didn't change from the previous build, then no action is required.
 100             if done_contents == rebuild_trigger_contents {
 101                 return build_llvm_config
 102             }
 103         }
 104
 105         let _folder = builder.fold_output(|| "llvm");
 106         let descriptor = if emscripten { "Emscripten " } else { "" };
 107         builder.info(&format!("Building {}LLVM for {}", descriptor, target));
 108         let _time = util::timeit(&builder);
 109         t!(fs::create_dir_all(&out_dir));
 110
 111         // http://llvm.org/docs/CMake.html
 112         let root = if self.emscripten { "src/llvm-emscripten" } else { "src/llvm" };
 113         let mut cfg = cmake::Config::new(builder.src.join(root));
 114
 115         let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
 116             (false, _) => "Debug",
 117             (true, false) => "Release",
 118             (true, true) => "RelWithDebInfo",
 119         };
 120
 121         // NOTE: remember to also update `config.toml.example` when changing the
 122         // defaults!
 123         let llvm_targets = if self.emscripten {
 124             "JSBackend"
 125         } else {
 126             match builder.config.llvm_targets {
 127                 Some(ref s) => s,
 128                 None => "X86;ARM;AArch64;Mips;PowerPC;SystemZ;MSP430;Sparc;NVPTX;Hexagon",
 129             }
 130         };
 131
 132         let llvm_exp_targets = if self.emscripten {
 133             ""
 134         } else {
 135             &builder.config.llvm_experimental_targets[..]
 136         };
 137
 138         let assertions = if builder.config.llvm_assertions {"ON"} else {"OFF"};
 139
 140         cfg.out_dir(&out_dir)
 141            .profile(profile)
 142            .define("LLVM_ENABLE_ASSERTIONS", assertions)
 143            .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
 144            .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
 145            .define("LLVM_INCLUDE_EXAMPLES", "OFF")
 146            .define("LLVM_INCLUDE_TESTS", "OFF")
 147            .define("LLVM_INCLUDE_DOCS", "OFF")
 148            .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
 149            .define("LLVM_ENABLE_ZLIB", "OFF")
 150            .define("WITH_POLLY", "OFF")
 151            .define("LLVM_ENABLE_TERMINFO", "OFF")
 152            .define("LLVM_ENABLE_LIBEDIT", "OFF")
 153            .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
 154            .define("LLVM_TARGET_ARCH", target.split('-').next().unwrap())
 155            .define("LLVM_DEFAULT_TARGET_TRIPLE", target);
 156
 157         if builder.config.llvm_thin_lto && !emscripten {
 158             cfg.define("LLVM_ENABLE_LTO", "Thin")
 159                .define("LLVM_ENABLE_LLD", "ON");
 160         }
 161
 162         // By default, LLVM will automatically find OCaml and, if it finds it,
 163         // install the LLVM bindings in LLVM_OCAML_INSTALL_PATH, which defaults
 164         // to /usr/bin/ocaml.
 165         // This causes problem for non-root builds of Rust. Side-step the issue
 166         // by setting LLVM_OCAML_INSTALL_PATH to a relative path, so it installs
 167         // in the prefix.
 168         cfg.define("LLVM_OCAML_INSTALL_PATH",
 169             env::var_os("LLVM_OCAML_INSTALL_PATH").unwrap_or_else(|| "usr/lib/ocaml".into()));
 170
 171         let want_lldb = builder.config.lldb_enabled && !self.emscripten;
 172
 173         // This setting makes the LLVM tools link to the dynamic LLVM library,
 174         // which saves both memory during parallel links and overall disk space
 175         // for the tools. We don't do this on every platform as it doesn't work
 176         // equally well everywhere.
 177         if builder.llvm_link_tools_dynamically(target) && !emscripten {
 178             cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
 179         }
 180
 181         // For distribution we want the LLVM tools to be *statically* linked to libstdc++
 182         if builder.config.llvm_tools_enabled || want_lldb {
 183             if !target.contains("windows") {
 184                 if target.contains("apple") {
 185                     cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
 186                 } else {
 187                     cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
 188                 }
 189             }
 190         }
 191
 192         if target.contains("msvc") {
 193             cfg.define("LLVM_USE_CRT_DEBUG", "MT");
 194             cfg.define("LLVM_USE_CRT_RELEASE", "MT");
 195             cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
 196             cfg.static_crt(true);
 197         }
 198
 199         if target.starts_with("i686") {
 200             cfg.define("LLVM_BUILD_32_BITS", "ON");
 201         }
 202
 203         if want_lldb {
 204             cfg.define("LLVM_EXTERNAL_CLANG_SOURCE_DIR", builder.src.join("src/tools/clang"));
 205             cfg.define("LLVM_EXTERNAL_LLDB_SOURCE_DIR", builder.src.join("src/tools/lldb"));
 206             // For the time being, disable code signing.
 207             cfg.define("LLDB_CODESIGN_IDENTITY", "");
 208         } else {
 209             // LLDB requires libxml2; but otherwise we want it to be disabled.
 210             // See https://github.com/rust-lang/rust/pull/50104
 211             cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
 212         }
 213
 214         if let Some(num_linkers) = builder.config.llvm_link_jobs {
 215             if num_linkers > 0 {
 216                 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
 217             }
 218         }
 219
 220         // http://llvm.org/docs/HowToCrossCompileLLVM.html
 221         if target != builder.config.build && !emscripten {
 222             builder.ensure(Llvm {
 223                 target: builder.config.build,
 224                 emscripten: false,
 225             });
 226             // FIXME: if the llvm root for the build triple is overridden then we
 227             //        should use llvm-tblgen from there, also should verify that it
 228             //        actually exists most of the time in normal installs of LLVM.
 229             let host = builder.llvm_out(builder.config.build).join("bin/llvm-tblgen");
 230             cfg.define("CMAKE_CROSSCOMPILING", "True")
 231                .define("LLVM_TABLEGEN", &host);
 232
 233             if target.contains("netbsd") {
 234                cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
 235             } else if target.contains("freebsd") {
 236                cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
 237             }
 238
 239             cfg.define("LLVM_NATIVE_BUILD", builder.llvm_out(builder.config.build).join("build"));
 240         }
 241
 242         if let Some(ref suffix) = builder.config.llvm_version_suffix {
 243             cfg.define("LLVM_VERSION_SUFFIX", suffix);
 244         }
 245
 246         if let Some(ref python) = builder.config.python {
 247             cfg.define("PYTHON_EXECUTABLE", python);
 248         }
 249
 250         configure_cmake(builder, target, &mut cfg, false);
 251
 252         // FIXME: we don't actually need to build all LLVM tools and all LLVM
 253         //        libraries here, e.g. we just want a few components and a few
 254         //        tools. Figure out how to filter them down and only build the right
 255         //        tools and libs on all platforms.
 256
 257         if builder.config.dry_run {
 258             return build_llvm_config;
 259         }
 260
 261         cfg.build();
 262
 263         t!(t!(File::create(&done_stamp)).write_all(rebuild_trigger_contents.as_bytes()));
 264
 265         build_llvm_config
 266     }
 267 }
 268
 269 fn check_llvm_version(builder: &Builder, llvm_config: &Path) {
 270     if !builder.config.llvm_version_check {
 271         return
 272     }
 273
 274     if builder.config.dry_run {
 275         return;
 276     }
 277
 278     let mut cmd = Command::new(llvm_config);
 279     let version = output(cmd.arg("--version"));
 280     let mut parts = version.split('.').take(2)
 281         .filter_map(|s| s.parse::<u32>().ok());
 282     if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
 283         if major >= 5 {
 284             return
 285         }
 286     }
 287     panic!("\n\nbad LLVM version: {}, need >=5.0\n\n", version)
 288 }
 289
 290 fn configure_cmake(builder: &Builder,
 291                    target: Interned<String>,
 292                    cfg: &mut cmake::Config,
 293                    building_dist_binaries: bool) {
 294     if builder.config.ninja {
 295         cfg.generator("Ninja");
 296     }
 297     cfg.target(&target)
 298        .host(&builder.config.build);
 299
 300     let sanitize_cc = |cc: &Path| {
 301         if target.contains("msvc") {
 302             OsString::from(cc.to_str().unwrap().replace("\\", "/"))
 303         } else {
 304             cc.as_os_str().to_owned()
 305         }
 306     };
 307
 308     // MSVC with CMake uses msbuild by default which doesn't respect these
 309     // vars that we'd otherwise configure. In that case we just skip this
 310     // entirely.
 311     if target.contains("msvc") && !builder.config.ninja {
 312         return
 313     }
 314
 315     let (cc, cxx) = match builder.config.llvm_clang_cl {
 316         Some(ref cl) => (cl.as_ref(), cl.as_ref()),
 317         None => (builder.cc(target), builder.cxx(target).unwrap()),
 318     };
 319
 320     // Handle msvc + ninja + ccache specially (this is what the bots use)
 321     if target.contains("msvc") &&
 322        builder.config.ninja &&
 323        builder.config.ccache.is_some()
 324     {
 325        let mut wrap_cc = env::current_exe().expect("failed to get cwd");
 326        wrap_cc.set_file_name("sccache-plus-cl.exe");
 327
 328        cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
 329           .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
 330        cfg.env("SCCACHE_PATH",
 331                builder.config.ccache.as_ref().unwrap())
 332           .env("SCCACHE_TARGET", target)
 333           .env("SCCACHE_CC", &cc)
 334           .env("SCCACHE_CXX", &cxx);
 335
 336        // Building LLVM on MSVC can be a little ludicrous at times. We're so far
 337        // off the beaten path here that I'm not really sure this is even half
 338        // supported any more. Here we're trying to:
 339        //
 340        // * Build LLVM on MSVC
 341        // * Build LLVM with `clang-cl` instead of `cl.exe`
 342        // * Build a project with `sccache`
 343        // * Build for 32-bit as well
 344        // * Build with Ninja
 345        //
 346        // For `cl.exe` there are different binaries to compile 32/64 bit which
 347        // we use but for `clang-cl` there's only one which internally
 348        // multiplexes via flags. As a result it appears that CMake's detection
 349        // of a compiler's architecture and such on MSVC **doesn't** pass any
 350        // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
 351        // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
 352        // definitely causes problems since all the env vars are pointing to
 353        // 32-bit libraries.
 354        //
 355        // To hack aroudn this... again... we pass an argument that's
 356        // unconditionally passed in the sccache shim. This'll get CMake to
 357        // correctly diagnose it's doing a 32-bit compilation and LLVM will
 358        // internally configure itself appropriately.
 359        if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
 360            cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
 361        }
 362
 363     // If ccache is configured we inform the build a little differently hwo
 364     // to invoke ccache while also invoking our compilers.
 365     } else if let Some(ref ccache) = builder.config.ccache {
 366        cfg.define("CMAKE_C_COMPILER", ccache)
 367           .define("CMAKE_C_COMPILER_ARG1", sanitize_cc(cc))
 368           .define("CMAKE_CXX_COMPILER", ccache)
 369           .define("CMAKE_CXX_COMPILER_ARG1", sanitize_cc(cxx));
 370     } else {
 371        cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
 372           .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx));
 373     }
 374
 375     cfg.build_arg("-j").build_arg(builder.jobs().to_string());
 376     cfg.define("CMAKE_C_FLAGS", builder.cflags(target).join(" "));
 377     let mut cxxflags = builder.cflags(target).join(" ");
 378     if building_dist_binaries {
 379         if builder.config.llvm_static_stdcpp && !target.contains("windows") {
 380             cxxflags.push_str(" -static-libstdc++");
 381         }
 382     }
 383     cfg.define("CMAKE_CXX_FLAGS", cxxflags);
 384     if let Some(ar) = builder.ar(target) {
 385         if ar.is_absolute() {
 386             // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
 387             // tries to resolve this path in the LLVM build directory.
 388             cfg.define("CMAKE_AR", sanitize_cc(ar));
 389         }
 390     }
 391
 392     if let Some(ranlib) = builder.ranlib(target) {
 393         if ranlib.is_absolute() {
 394             // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
 395             // tries to resolve this path in the LLVM build directory.
 396             cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
 397         }
 398     }
 399
 400     if env::var_os("SCCACHE_ERROR_LOG").is_some() {
 401         cfg.env("RUST_LOG", "sccache=warn");
 402     }
 403 }
 404
 405 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 406 pub struct Lld {
 407     pub target: Interned<String>,
 408 }
 409
 410 impl Step for Lld {
 411     type Output = PathBuf;
 412     const ONLY_HOSTS: bool = true;
 413
 414     fn should_run(run: ShouldRun) -> ShouldRun {
 415         run.path("src/tools/lld")
 416     }
 417
 418     fn make_run(run: RunConfig) {
 419         run.builder.ensure(Lld { target: run.target });
 420     }
 421
 422     /// Compile LLVM for `target`.
 423     fn run(self, builder: &Builder) -> PathBuf {
 424         if builder.config.dry_run {
 425             return PathBuf::from("lld-out-dir-test-gen");
 426         }
 427         let target = self.target;
 428
 429         let llvm_config = builder.ensure(Llvm {
 430             target: self.target,
 431             emscripten: false,
 432         });
 433
 434         let out_dir = builder.lld_out(target);
 435         let done_stamp = out_dir.join("lld-finished-building");
 436         if done_stamp.exists() {
 437             return out_dir
 438         }
 439
 440         let _folder = builder.fold_output(|| "lld");
 441         builder.info(&format!("Building LLD for {}", target));
 442         let _time = util::timeit(&builder);
 443         t!(fs::create_dir_all(&out_dir));
 444
 445         let mut cfg = cmake::Config::new(builder.src.join("src/tools/lld"));
 446         configure_cmake(builder, target, &mut cfg, true);
 447
 448         // This is an awful, awful hack. Discovered when we migrated to using
 449         // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
 450         // tree, will execute `llvm-config --cmakedir` and then tell CMake about
 451         // that directory for later processing. Unfortunately if this path has
 452         // forward slashes in it (which it basically always does on Windows)
 453         // then CMake will hit a syntax error later on as... something isn't
 454         // escaped it seems?
 455         //
 456         // Instead of attempting to fix this problem in upstream CMake and/or
 457         // LLVM/LLD we just hack around it here. This thin wrapper will take the
 458         // output from llvm-config and replace all instances of `\` with `/` to
 459         // ensure we don't hit the same bugs with escaping. It means that you
 460         // can't build on a system where your paths require `\` on Windows, but
 461         // there's probably a lot of reasons you can't do that other than this.
 462         let llvm_config_shim = env::current_exe()
 463             .unwrap()
 464             .with_file_name("llvm-config-wrapper");
 465         cfg.out_dir(&out_dir)
 466            .profile("Release")
 467            .env("LLVM_CONFIG_REAL", llvm_config)
 468            .define("LLVM_CONFIG_PATH", llvm_config_shim)
 469            .define("LLVM_INCLUDE_TESTS", "OFF");
 470
 471         cfg.build();
 472
 473         t!(File::create(&done_stamp));
 474         out_dir
 475     }
 476 }
 477
 478 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 479 pub struct TestHelpers {
 480     pub target: Interned<String>,
 481 }
 482
 483 impl Step for TestHelpers {
 484     type Output = ();
 485
 486     fn should_run(run: ShouldRun) -> ShouldRun {
 487         run.path("src/test/auxiliary/rust_test_helpers.c")
 488     }
 489
 490     fn make_run(run: RunConfig) {
 491         run.builder.ensure(TestHelpers { target: run.target })
 492     }
 493
 494     /// Compiles the `rust_test_helpers.c` library which we used in various
 495     /// `run-pass` test suites for ABI testing.
 496     fn run(self, builder: &Builder) {
 497         if builder.config.dry_run {
 498             return;
 499         }
 500         let target = self.target;
 501         let dst = builder.test_helpers_out(target);
 502         let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
 503         if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
 504             return
 505         }
 506
 507         let _folder = builder.fold_output(|| "build_test_helpers");
 508         builder.info("Building test helpers");
 509         t!(fs::create_dir_all(&dst));
 510         let mut cfg = cc::Build::new();
 511
 512         // We may have found various cross-compilers a little differently due to our
 513         // extra configuration, so inform gcc of these compilers. Note, though, that
 514         // on MSVC we still need gcc's detection of env vars (ugh).
 515         if !target.contains("msvc") {
 516             if let Some(ar) = builder.ar(target) {
 517                 cfg.archiver(ar);
 518             }
 519             cfg.compiler(builder.cc(target));
 520         }
 521
 522         cfg.cargo_metadata(false)
 523            .out_dir(&dst)
 524            .target(&target)
 525            .host(&builder.config.build)
 526            .opt_level(0)
 527            .warnings(false)
 528            .debug(false)
 529            .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
 530            .compile("rust_test_helpers");
 531     }
 532 }
 533
 534 const OPENSSL_VERS: &'static str = "1.0.2n";
 535 const OPENSSL_SHA256: &'static str =
 536     "370babb75f278c39e0c50e8c4e7493bc0f18db6867478341a832a982fd15a8fe";
 537
 538 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 539 pub struct Openssl {
 540     pub target: Interned<String>,
 541 }
 542
 543 impl Step for Openssl {
 544     type Output = ();
 545
 546     fn should_run(run: ShouldRun) -> ShouldRun {
 547         run.never()
 548     }
 549
 550     fn run(self, builder: &Builder) {
 551         if builder.config.dry_run {
 552             return;
 553         }
 554         let target = self.target;
 555         let out = match builder.openssl_dir(target) {
 556             Some(dir) => dir,
 557             None => return,
 558         };
 559
 560         let stamp = out.join(".stamp");
 561         let mut contents = String::new();
 562         drop(File::open(&stamp).and_then(|mut f| f.read_to_string(&mut contents)));
 563         if contents == OPENSSL_VERS {
 564             return
 565         }
 566         t!(fs::create_dir_all(&out));
 567
 568         let name = format!("openssl-{}.tar.gz", OPENSSL_VERS);
 569         let tarball = out.join(&name);
 570         if !tarball.exists() {
 571             let tmp = tarball.with_extension("tmp");
 572             // originally from https://www.openssl.org/source/...
 573             let url = format!("https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/{}",
 574                               name);
 575             let mut last_error = None;
 576             for _ in 0..3 {
 577                 let status = Command::new("curl")
 578                                 .arg("-o").arg(&tmp)
 579                                 .arg("-f")  // make curl fail if the URL does not return HTTP 200
 580                                 .arg(&url)
 581                                 .status()
 582                                 .expect("failed to spawn curl");
 583
 584                 // Retry if download failed.
 585                 if !status.success() {
 586                     last_error = Some(status.to_string());
 587                     continue;
 588                 }
 589
 590                 // Ensure the hash is correct.
 591                 let mut shasum = if target.contains("apple") ||
 592                     builder.config.build.contains("netbsd") {
 593                     let mut cmd = Command::new("shasum");
 594                     cmd.arg("-a").arg("256");
 595                     cmd
 596                 } else {
 597                     Command::new("sha256sum")
 598                 };
 599                 let output = output(&mut shasum.arg(&tmp));
 600                 let found = output.split_whitespace().next().unwrap();
 601
 602                 // If the hash is wrong, probably the download is incomplete or S3 served an error
 603                 // page. In any case, retry.
 604                 if found != OPENSSL_SHA256 {
 605                     last_error = Some(format!(
 606                         "downloaded openssl sha256 different\n\
 607                          expected: {}\n\
 608                          found:    {}\n",
 609                         OPENSSL_SHA256,
 610                         found
 611                     ));
 612                     continue;
 613                 }
 614
 615                 // Everything is fine, so exit the retry loop.
 616                 last_error = None;
 617                 break;
 618             }
 619             if let Some(error) = last_error {
 620                 panic!("failed to download openssl source: {}", error);
 621             }
 622             t!(fs::rename(&tmp, &tarball));
 623         }
 624         let obj = out.join(format!("openssl-{}", OPENSSL_VERS));
 625         let dst = builder.openssl_install_dir(target).unwrap();
 626         drop(fs::remove_dir_all(&obj));
 627         drop(fs::remove_dir_all(&dst));
 628         builder.run(Command::new("tar").arg("zxf").arg(&tarball).current_dir(&out));
 629
 630         let mut configure = Command::new("perl");
 631         configure.arg(obj.join("Configure"));
 632         configure.arg(format!("--prefix={}", dst.display()));
 633         configure.arg("no-dso");
 634         configure.arg("no-ssl2");
 635         configure.arg("no-ssl3");
 636
 637         let os = match &*target {
 638             "aarch64-linux-android" => "linux-aarch64",
 639             "aarch64-unknown-linux-gnu" => "linux-aarch64",
 640             "aarch64-unknown-linux-musl" => "linux-aarch64",
 641             "aarch64-unknown-netbsd" => "BSD-generic64",
 642             "arm-linux-androideabi" => "android",
 643             "arm-unknown-linux-gnueabi" => "linux-armv4",
 644             "arm-unknown-linux-gnueabihf" => "linux-armv4",
 645             "armv6-unknown-netbsd-eabihf" => "BSD-generic32",
 646             "armv7-linux-androideabi" => "android-armv7",
 647             "armv7-unknown-linux-gnueabihf" => "linux-armv4",
 648             "armv7-unknown-netbsd-eabihf" => "BSD-generic32",
 649             "i586-unknown-linux-gnu" => "linux-elf",
 650             "i586-unknown-linux-musl" => "linux-elf",
 651             "i686-apple-darwin" => "darwin-i386-cc",
 652             "i686-linux-android" => "android-x86",
 653             "i686-unknown-freebsd" => "BSD-x86-elf",
 654             "i686-unknown-linux-gnu" => "linux-elf",
 655             "i686-unknown-linux-musl" => "linux-elf",
 656             "i686-unknown-netbsd" => "BSD-x86-elf",
 657             "mips-unknown-linux-gnu" => "linux-mips32",
 658             "mips64-unknown-linux-gnuabi64" => "linux64-mips64",
 659             "mips64el-unknown-linux-gnuabi64" => "linux64-mips64",
 660             "mipsel-unknown-linux-gnu" => "linux-mips32",
 661             "powerpc-unknown-linux-gnu" => "linux-ppc",
 662             "powerpc-unknown-linux-gnuspe" => "linux-ppc",
 663             "powerpc-unknown-netbsd" => "BSD-generic32",
 664             "powerpc64-unknown-linux-gnu" => "linux-ppc64",
 665             "powerpc64le-unknown-linux-gnu" => "linux-ppc64le",
 666             "powerpc64le-unknown-linux-musl" => "linux-ppc64le",
 667             "s390x-unknown-linux-gnu" => "linux64-s390x",
 668             "sparc-unknown-linux-gnu" => "linux-sparcv9",
 669             "sparc64-unknown-linux-gnu" => "linux64-sparcv9",
 670             "sparc64-unknown-netbsd" => "BSD-sparc64",
 671             "x86_64-apple-darwin" => "darwin64-x86_64-cc",
 672             "x86_64-linux-android" => "linux-x86_64",
 673             "x86_64-unknown-freebsd" => "BSD-x86_64",
 674             "x86_64-unknown-dragonfly" => "BSD-x86_64",
 675             "x86_64-unknown-linux-gnu" => "linux-x86_64",
 676             "x86_64-unknown-linux-gnux32" => "linux-x32",
 677             "x86_64-unknown-linux-musl" => "linux-x86_64",
 678             "x86_64-unknown-netbsd" => "BSD-x86_64",
 679             _ => panic!("don't know how to configure OpenSSL for {}", target),
 680         };
 681         configure.arg(os);
 682         configure.env("CC", builder.cc(target));
 683         for flag in builder.cflags(target) {
 684             configure.arg(flag);
 685         }
 686         // There is no specific os target for android aarch64 or x86_64,
 687         // so we need to pass some extra cflags
 688         if target == "aarch64-linux-android" || target == "x86_64-linux-android" {
 689             configure.arg("-mandroid");
 690             configure.arg("-fomit-frame-pointer");
 691         }
 692         if target == "sparc64-unknown-netbsd" {
 693             // Need -m64 to get assembly generated correctly for sparc64.
 694             configure.arg("-m64");
 695             if builder.config.build.contains("netbsd") {
 696                 // Disable sparc64 asm on NetBSD builders, it uses
 697                 // m4(1)'s -B flag, which NetBSD m4 does not support.
 698                 configure.arg("no-asm");
 699             }
 700         }
 701         // Make PIE binaries
 702         // Non-PIE linker support was removed in Lollipop
 703         // https://source.android.com/security/enhancements/enhancements50
 704         if target == "i686-linux-android" {
 705             configure.arg("no-asm");
 706         }
 707         configure.current_dir(&obj);
 708         builder.info(&format!("Configuring openssl for {}", target));
 709         builder.run_quiet(&mut configure);
 710         builder.info(&format!("Building openssl for {}", target));
 711         builder.run_quiet(Command::new("make").arg("-j1").current_dir(&obj));
 712         builder.info(&format!("Installing openssl for {}", target));
 713         builder.run_quiet(Command::new("make").arg("install").arg("-j1").current_dir(&obj));
 714
 715         let mut f = t!(File::create(&stamp));
 716         t!(f.write_all(OPENSSL_VERS.as_bytes()));
 717     }
 718 }