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_ENABLE_ZLIB", "OFF")
 149            .define("WITH_POLLY", "OFF")
 150            .define("LLVM_ENABLE_TERMINFO", "OFF")
 151            .define("LLVM_ENABLE_LIBEDIT", "OFF")
 152            .define("LLVM_ENABLE_LIBXML2", "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         // By default, LLVM will automatically find OCaml and, if it finds it,
 158         // install the LLVM bindings in LLVM_OCAML_INSTALL_PATH, which defaults
 159         // to /usr/bin/ocaml.
 160         // This causes problem for non-root builds of Rust. Side-step the issue
 161         // by setting LLVM_OCAML_INSTALL_PATH to a relative path, so it installs
 162         // in the prefix.
 163         cfg.define("LLVM_OCAML_INSTALL_PATH",
 164             env::var_os("LLVM_OCAML_INSTALL_PATH").unwrap_or_else(|| "usr/lib/ocaml".into()));
 165
 166         // This setting makes the LLVM tools link to the dynamic LLVM library,
 167         // which saves both memory during parallel links and overall disk space
 168         // for the tools.  We don't distribute any of those tools, so this is
 169         // just a local concern.  However, it doesn't work well everywhere.
 170         //
 171         // If we are shipping llvm tools then we statically link them LLVM
 172         if (target.contains("linux-gnu") || target.contains("apple-darwin")) &&
 173             !builder.config.llvm_tools_enabled {
 174                 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
 175         }
 176
 177         // For distribution we want the LLVM tools to be *statically* linked to libstdc++
 178         if builder.config.llvm_tools_enabled {
 179             if !target.contains("windows") {
 180                 if target.contains("apple") {
 181                     cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
 182                 } else {
 183                     cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
 184                 }
 185             }
 186         }
 187
 188         if target.contains("msvc") {
 189             cfg.define("LLVM_USE_CRT_DEBUG", "MT");
 190             cfg.define("LLVM_USE_CRT_RELEASE", "MT");
 191             cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
 192             cfg.static_crt(true);
 193         }
 194
 195         if target.starts_with("i686") {
 196             cfg.define("LLVM_BUILD_32_BITS", "ON");
 197         }
 198
 199         if let Some(num_linkers) = builder.config.llvm_link_jobs {
 200             if num_linkers > 0 {
 201                 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
 202             }
 203         }
 204
 205         // http://llvm.org/docs/HowToCrossCompileLLVM.html
 206         if target != builder.config.build && !emscripten {
 207             builder.ensure(Llvm {
 208                 target: builder.config.build,
 209                 emscripten: false,
 210             });
 211             // FIXME: if the llvm root for the build triple is overridden then we
 212             //        should use llvm-tblgen from there, also should verify that it
 213             //        actually exists most of the time in normal installs of LLVM.
 214             let host = builder.llvm_out(builder.config.build).join("bin/llvm-tblgen");
 215             cfg.define("CMAKE_CROSSCOMPILING", "True")
 216                .define("LLVM_TABLEGEN", &host);
 217
 218             if target.contains("netbsd") {
 219                cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
 220             } else if target.contains("freebsd") {
 221                cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
 222             }
 223
 224             cfg.define("LLVM_NATIVE_BUILD", builder.llvm_out(builder.config.build).join("build"));
 225         }
 226
 227         configure_cmake(builder, target, &mut cfg, false);
 228
 229         // FIXME: we don't actually need to build all LLVM tools and all LLVM
 230         //        libraries here, e.g. we just want a few components and a few
 231         //        tools. Figure out how to filter them down and only build the right
 232         //        tools and libs on all platforms.
 233
 234         if builder.config.dry_run {
 235             return build_llvm_config;
 236         }
 237
 238         cfg.build();
 239
 240         t!(t!(File::create(&done_stamp)).write_all(rebuild_trigger_contents.as_bytes()));
 241
 242         build_llvm_config
 243     }
 244 }
 245
 246 fn check_llvm_version(builder: &Builder, llvm_config: &Path) {
 247     if !builder.config.llvm_version_check {
 248         return
 249     }
 250
 251     if builder.config.dry_run {
 252         return;
 253     }
 254
 255     let mut cmd = Command::new(llvm_config);
 256     let version = output(cmd.arg("--version"));
 257     let mut parts = version.split('.').take(2)
 258         .filter_map(|s| s.parse::<u32>().ok());
 259     if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
 260         if major >= 5 {
 261             return
 262         }
 263     }
 264     panic!("\n\nbad LLVM version: {}, need >=5.0\n\n", version)
 265 }
 266
 267 fn configure_cmake(builder: &Builder,
 268                    target: Interned<String>,
 269                    cfg: &mut cmake::Config,
 270                    building_dist_binaries: bool) {
 271     if builder.config.ninja {
 272         cfg.generator("Ninja");
 273     }
 274     cfg.target(&target)
 275        .host(&builder.config.build);
 276
 277     let sanitize_cc = |cc: &Path| {
 278         if target.contains("msvc") {
 279             OsString::from(cc.to_str().unwrap().replace("\\", "/"))
 280         } else {
 281             cc.as_os_str().to_owned()
 282         }
 283     };
 284
 285     // MSVC with CMake uses msbuild by default which doesn't respect these
 286     // vars that we'd otherwise configure. In that case we just skip this
 287     // entirely.
 288     if target.contains("msvc") && !builder.config.ninja {
 289         return
 290     }
 291
 292     let (cc, cxx) = match builder.config.llvm_clang_cl {
 293         Some(ref cl) => (cl.as_ref(), cl.as_ref()),
 294         None => (builder.cc(target), builder.cxx(target).unwrap()),
 295     };
 296
 297     // Handle msvc + ninja + ccache specially (this is what the bots use)
 298     if target.contains("msvc") &&
 299        builder.config.ninja &&
 300        builder.config.ccache.is_some()
 301     {
 302        let mut wrap_cc = env::current_exe().expect("failed to get cwd");
 303        wrap_cc.set_file_name("sccache-plus-cl.exe");
 304
 305        cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
 306           .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
 307        cfg.env("SCCACHE_PATH",
 308                builder.config.ccache.as_ref().unwrap())
 309           .env("SCCACHE_TARGET", target)
 310           .env("SCCACHE_CC", &cc)
 311           .env("SCCACHE_CXX", &cxx);
 312
 313        // Building LLVM on MSVC can be a little ludicrous at times. We're so far
 314        // off the beaten path here that I'm not really sure this is even half
 315        // supported any more. Here we're trying to:
 316        //
 317        // * Build LLVM on MSVC
 318        // * Build LLVM with `clang-cl` instead of `cl.exe`
 319        // * Build a project with `sccache`
 320        // * Build for 32-bit as well
 321        // * Build with Ninja
 322        //
 323        // For `cl.exe` there are different binaries to compile 32/64 bit which
 324        // we use but for `clang-cl` there's only one which internally
 325        // multiplexes via flags. As a result it appears that CMake's detection
 326        // of a compiler's architecture and such on MSVC **doesn't** pass any
 327        // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
 328        // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
 329        // definitely causes problems since all the env vars are pointing to
 330        // 32-bit libraries.
 331        //
 332        // To hack aroudn this... again... we pass an argument that's
 333        // unconditionally passed in the sccache shim. This'll get CMake to
 334        // correctly diagnose it's doing a 32-bit compilation and LLVM will
 335        // internally configure itself appropriately.
 336        if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
 337            cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
 338        }
 339
 340     // If ccache is configured we inform the build a little differently hwo
 341     // to invoke ccache while also invoking our compilers.
 342     } else if let Some(ref ccache) = builder.config.ccache {
 343        cfg.define("CMAKE_C_COMPILER", ccache)
 344           .define("CMAKE_C_COMPILER_ARG1", sanitize_cc(cc))
 345           .define("CMAKE_CXX_COMPILER", ccache)
 346           .define("CMAKE_CXX_COMPILER_ARG1", sanitize_cc(cxx));
 347     } else {
 348        cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
 349           .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx));
 350     }
 351
 352     cfg.build_arg("-j").build_arg(builder.jobs().to_string());
 353     cfg.define("CMAKE_C_FLAGS", builder.cflags(target).join(" "));
 354     let mut cxxflags = builder.cflags(target).join(" ");
 355     if building_dist_binaries {
 356         if builder.config.llvm_static_stdcpp && !target.contains("windows") {
 357             cxxflags.push_str(" -static-libstdc++");
 358         }
 359     }
 360     cfg.define("CMAKE_CXX_FLAGS", cxxflags);
 361     if let Some(ar) = builder.ar(target) {
 362         if ar.is_absolute() {
 363             // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
 364             // tries to resolve this path in the LLVM build directory.
 365             cfg.define("CMAKE_AR", sanitize_cc(ar));
 366         }
 367     }
 368
 369     if env::var_os("SCCACHE_ERROR_LOG").is_some() {
 370         cfg.env("RUST_LOG", "sccache=warn");
 371     }
 372 }
 373
 374 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 375 pub struct Lld {
 376     pub target: Interned<String>,
 377 }
 378
 379 impl Step for Lld {
 380     type Output = PathBuf;
 381     const ONLY_HOSTS: bool = true;
 382
 383     fn should_run(run: ShouldRun) -> ShouldRun {
 384         run.path("src/tools/lld")
 385     }
 386
 387     fn make_run(run: RunConfig) {
 388         run.builder.ensure(Lld { target: run.target });
 389     }
 390
 391     /// Compile LLVM for `target`.
 392     fn run(self, builder: &Builder) -> PathBuf {
 393         if builder.config.dry_run {
 394             return PathBuf::from("lld-out-dir-test-gen");
 395         }
 396         let target = self.target;
 397
 398         let llvm_config = builder.ensure(Llvm {
 399             target: self.target,
 400             emscripten: false,
 401         });
 402
 403         let out_dir = builder.lld_out(target);
 404         let done_stamp = out_dir.join("lld-finished-building");
 405         if done_stamp.exists() {
 406             return out_dir
 407         }
 408
 409         let _folder = builder.fold_output(|| "lld");
 410         builder.info(&format!("Building LLD for {}", target));
 411         let _time = util::timeit(&builder);
 412         t!(fs::create_dir_all(&out_dir));
 413
 414         let mut cfg = cmake::Config::new(builder.src.join("src/tools/lld"));
 415         configure_cmake(builder, target, &mut cfg, true);
 416
 417         // This is an awful, awful hack. Discovered when we migrated to using
 418         // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
 419         // tree, will execute `llvm-config --cmakedir` and then tell CMake about
 420         // that directory for later processing. Unfortunately if this path has
 421         // forward slashes in it (which it basically always does on Windows)
 422         // then CMake will hit a syntax error later on as... something isn't
 423         // escaped it seems?
 424         //
 425         // Instead of attempting to fix this problem in upstream CMake and/or
 426         // LLVM/LLD we just hack around it here. This thin wrapper will take the
 427         // output from llvm-config and replace all instances of `\` with `/` to
 428         // ensure we don't hit the same bugs with escaping. It means that you
 429         // can't build on a system where your paths require `\` on Windows, but
 430         // there's probably a lot of reasons you can't do that other than this.
 431         let llvm_config_shim = env::current_exe()
 432             .unwrap()
 433             .with_file_name("llvm-config-wrapper");
 434         cfg.out_dir(&out_dir)
 435            .profile("Release")
 436            .env("LLVM_CONFIG_REAL", llvm_config)
 437            .define("LLVM_CONFIG_PATH", llvm_config_shim)
 438            .define("LLVM_INCLUDE_TESTS", "OFF");
 439
 440         cfg.build();
 441
 442         t!(File::create(&done_stamp));
 443         out_dir
 444     }
 445 }
 446
 447 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 448 pub struct TestHelpers {
 449     pub target: Interned<String>,
 450 }
 451
 452 impl Step for TestHelpers {
 453     type Output = ();
 454
 455     fn should_run(run: ShouldRun) -> ShouldRun {
 456         run.path("src/test/auxiliary/rust_test_helpers.c")
 457     }
 458
 459     fn make_run(run: RunConfig) {
 460         run.builder.ensure(TestHelpers { target: run.target })
 461     }
 462
 463     /// Compiles the `rust_test_helpers.c` library which we used in various
 464     /// `run-pass` test suites for ABI testing.
 465     fn run(self, builder: &Builder) {
 466         if builder.config.dry_run {
 467             return;
 468         }
 469         let target = self.target;
 470         let dst = builder.test_helpers_out(target);
 471         let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
 472         if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
 473             return
 474         }
 475
 476         let _folder = builder.fold_output(|| "build_test_helpers");
 477         builder.info("Building test helpers");
 478         t!(fs::create_dir_all(&dst));
 479         let mut cfg = cc::Build::new();
 480
 481         // We may have found various cross-compilers a little differently due to our
 482         // extra configuration, so inform gcc of these compilers. Note, though, that
 483         // on MSVC we still need gcc's detection of env vars (ugh).
 484         if !target.contains("msvc") {
 485             if let Some(ar) = builder.ar(target) {
 486                 cfg.archiver(ar);
 487             }
 488             cfg.compiler(builder.cc(target));
 489         }
 490
 491         cfg.cargo_metadata(false)
 492            .out_dir(&dst)
 493            .target(&target)
 494            .host(&builder.config.build)
 495            .opt_level(0)
 496            .warnings(false)
 497            .debug(false)
 498            .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
 499            .compile("rust_test_helpers");
 500     }
 501 }
 502
 503 const OPENSSL_VERS: &'static str = "1.0.2n";
 504 const OPENSSL_SHA256: &'static str =
 505     "370babb75f278c39e0c50e8c4e7493bc0f18db6867478341a832a982fd15a8fe";
 506
 507 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 508 pub struct Openssl {
 509     pub target: Interned<String>,
 510 }
 511
 512 impl Step for Openssl {
 513     type Output = ();
 514
 515     fn should_run(run: ShouldRun) -> ShouldRun {
 516         run.never()
 517     }
 518
 519     fn run(self, builder: &Builder) {
 520         if builder.config.dry_run {
 521             return;
 522         }
 523         let target = self.target;
 524         let out = match builder.openssl_dir(target) {
 525             Some(dir) => dir,
 526             None => return,
 527         };
 528
 529         let stamp = out.join(".stamp");
 530         let mut contents = String::new();
 531         drop(File::open(&stamp).and_then(|mut f| f.read_to_string(&mut contents)));
 532         if contents == OPENSSL_VERS {
 533             return
 534         }
 535         t!(fs::create_dir_all(&out));
 536
 537         let name = format!("openssl-{}.tar.gz", OPENSSL_VERS);
 538         let tarball = out.join(&name);
 539         if !tarball.exists() {
 540             let tmp = tarball.with_extension("tmp");
 541             // originally from https://www.openssl.org/source/...
 542             let url = format!("https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/{}",
 543                               name);
 544             let mut last_error = None;
 545             for _ in 0..3 {
 546                 let status = Command::new("curl")
 547                                 .arg("-o").arg(&tmp)
 548                                 .arg("-f")  // make curl fail if the URL does not return HTTP 200
 549                                 .arg(&url)
 550                                 .status()
 551                                 .expect("failed to spawn curl");
 552
 553                 // Retry if download failed.
 554                 if !status.success() {
 555                     last_error = Some(status.to_string());
 556                     continue;
 557                 }
 558
 559                 // Ensure the hash is correct.
 560                 let mut shasum = if target.contains("apple") ||
 561                     builder.config.build.contains("netbsd") {
 562                     let mut cmd = Command::new("shasum");
 563                     cmd.arg("-a").arg("256");
 564                     cmd
 565                 } else {
 566                     Command::new("sha256sum")
 567                 };
 568                 let output = output(&mut shasum.arg(&tmp));
 569                 let found = output.split_whitespace().next().unwrap();
 570
 571                 // If the hash is wrong, probably the download is incomplete or S3 served an error
 572                 // page. In any case, retry.
 573                 if found != OPENSSL_SHA256 {
 574                     last_error = Some(format!(
 575                         "downloaded openssl sha256 different\n\
 576                          expected: {}\n\
 577                          found:    {}\n",
 578                         OPENSSL_SHA256,
 579                         found
 580                     ));
 581                     continue;
 582                 }
 583
 584                 // Everything is fine, so exit the retry loop.
 585                 last_error = None;
 586                 break;
 587             }
 588             if let Some(error) = last_error {
 589                 panic!("failed to download openssl source: {}", error);
 590             }
 591             t!(fs::rename(&tmp, &tarball));
 592         }
 593         let obj = out.join(format!("openssl-{}", OPENSSL_VERS));
 594         let dst = builder.openssl_install_dir(target).unwrap();
 595         drop(fs::remove_dir_all(&obj));
 596         drop(fs::remove_dir_all(&dst));
 597         builder.run(Command::new("tar").arg("zxf").arg(&tarball).current_dir(&out));
 598
 599         let mut configure = Command::new("perl");
 600         configure.arg(obj.join("Configure"));
 601         configure.arg(format!("--prefix={}", dst.display()));
 602         configure.arg("no-dso");
 603         configure.arg("no-ssl2");
 604         configure.arg("no-ssl3");
 605
 606         let os = match &*target {
 607             "aarch64-linux-android" => "linux-aarch64",
 608             "aarch64-unknown-linux-gnu" => "linux-aarch64",
 609             "aarch64-unknown-linux-musl" => "linux-aarch64",
 610             "arm-linux-androideabi" => "android",
 611             "arm-unknown-linux-gnueabi" => "linux-armv4",
 612             "arm-unknown-linux-gnueabihf" => "linux-armv4",
 613             "armv6-unknown-netbsd-eabihf" => "BSD-generic32",
 614             "armv7-linux-androideabi" => "android-armv7",
 615             "armv7-unknown-linux-gnueabihf" => "linux-armv4",
 616             "armv7-unknown-netbsd-eabihf" => "BSD-generic32",
 617             "i586-unknown-linux-gnu" => "linux-elf",
 618             "i586-unknown-linux-musl" => "linux-elf",
 619             "i686-apple-darwin" => "darwin-i386-cc",
 620             "i686-linux-android" => "android-x86",
 621             "i686-unknown-freebsd" => "BSD-x86-elf",
 622             "i686-unknown-linux-gnu" => "linux-elf",
 623             "i686-unknown-linux-musl" => "linux-elf",
 624             "i686-unknown-netbsd" => "BSD-x86-elf",
 625             "mips-unknown-linux-gnu" => "linux-mips32",
 626             "mips64-unknown-linux-gnuabi64" => "linux64-mips64",
 627             "mips64el-unknown-linux-gnuabi64" => "linux64-mips64",
 628             "mipsel-unknown-linux-gnu" => "linux-mips32",
 629             "powerpc-unknown-linux-gnu" => "linux-ppc",
 630             "powerpc-unknown-linux-gnuspe" => "linux-ppc",
 631             "powerpc-unknown-netbsd" => "BSD-generic32",
 632             "powerpc64-unknown-linux-gnu" => "linux-ppc64",
 633             "powerpc64le-unknown-linux-gnu" => "linux-ppc64le",
 634             "powerpc64le-unknown-linux-musl" => "linux-ppc64le",
 635             "s390x-unknown-linux-gnu" => "linux64-s390x",
 636             "sparc-unknown-linux-gnu" => "linux-sparcv9",
 637             "sparc64-unknown-linux-gnu" => "linux64-sparcv9",
 638             "sparc64-unknown-netbsd" => "BSD-sparc64",
 639             "x86_64-apple-darwin" => "darwin64-x86_64-cc",
 640             "x86_64-linux-android" => "linux-x86_64",
 641             "x86_64-unknown-freebsd" => "BSD-x86_64",
 642             "x86_64-unknown-dragonfly" => "BSD-x86_64",
 643             "x86_64-unknown-linux-gnu" => "linux-x86_64",
 644             "x86_64-unknown-linux-gnux32" => "linux-x32",
 645             "x86_64-unknown-linux-musl" => "linux-x86_64",
 646             "x86_64-unknown-netbsd" => "BSD-x86_64",
 647             _ => panic!("don't know how to configure OpenSSL for {}", target),
 648         };
 649         configure.arg(os);
 650         configure.env("CC", builder.cc(target));
 651         for flag in builder.cflags(target) {
 652             configure.arg(flag);
 653         }
 654         // There is no specific os target for android aarch64 or x86_64,
 655         // so we need to pass some extra cflags
 656         if target == "aarch64-linux-android" || target == "x86_64-linux-android" {
 657             configure.arg("-mandroid");
 658             configure.arg("-fomit-frame-pointer");
 659         }
 660         if target == "sparc64-unknown-netbsd" {
 661             // Need -m64 to get assembly generated correctly for sparc64.
 662             configure.arg("-m64");
 663             if builder.config.build.contains("netbsd") {
 664                 // Disable sparc64 asm on NetBSD builders, it uses
 665                 // m4(1)'s -B flag, which NetBSD m4 does not support.
 666                 configure.arg("no-asm");
 667             }
 668         }
 669         // Make PIE binaries
 670         // Non-PIE linker support was removed in Lollipop
 671         // https://source.android.com/security/enhancements/enhancements50
 672         if target == "i686-linux-android" {
 673             configure.arg("no-asm");
 674         }
 675         configure.current_dir(&obj);
 676         builder.info(&format!("Configuring openssl for {}", target));
 677         builder.run_quiet(&mut configure);
 678         builder.info(&format!("Building openssl for {}", target));
 679         builder.run_quiet(Command::new("make").arg("-j1").current_dir(&obj));
 680         builder.info(&format!("Installing openssl for {}", target));
 681         builder.run_quiet(Command::new("make").arg("install").arg("-j1").current_dir(&obj));
 682
 683         let mut f = t!(File::create(&stamp));
 684         t!(f.write_all(OPENSSL_VERS.as_bytes()));
 685     }
 686 }