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         if target.contains("linux-gnu") || target.contains("apple-darwin") {
 171            cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
 172         }
 173
 174         if target.contains("msvc") {
 175             cfg.define("LLVM_USE_CRT_DEBUG", "MT");
 176             cfg.define("LLVM_USE_CRT_RELEASE", "MT");
 177             cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
 178             cfg.static_crt(true);
 179         }
 180
 181         if target.starts_with("i686") {
 182             cfg.define("LLVM_BUILD_32_BITS", "ON");
 183         }
 184
 185         if let Some(num_linkers) = builder.config.llvm_link_jobs {
 186             if num_linkers > 0 {
 187                 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
 188             }
 189         }
 190
 191         // http://llvm.org/docs/HowToCrossCompileLLVM.html
 192         if target != builder.config.build && !emscripten {
 193             builder.ensure(Llvm {
 194                 target: builder.config.build,
 195                 emscripten: false,
 196             });
 197             // FIXME: if the llvm root for the build triple is overridden then we
 198             //        should use llvm-tblgen from there, also should verify that it
 199             //        actually exists most of the time in normal installs of LLVM.
 200             let host = builder.llvm_out(builder.config.build).join("bin/llvm-tblgen");
 201             cfg.define("CMAKE_CROSSCOMPILING", "True")
 202                .define("LLVM_TABLEGEN", &host);
 203
 204             if target.contains("netbsd") {
 205                cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
 206             } else if target.contains("freebsd") {
 207                cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
 208             }
 209
 210             cfg.define("LLVM_NATIVE_BUILD", builder.llvm_out(builder.config.build).join("build"));
 211         }
 212
 213         configure_cmake(builder, target, &mut cfg, false);
 214
 215         // FIXME: we don't actually need to build all LLVM tools and all LLVM
 216         //        libraries here, e.g. we just want a few components and a few
 217         //        tools. Figure out how to filter them down and only build the right
 218         //        tools and libs on all platforms.
 219
 220         if builder.config.dry_run {
 221             return build_llvm_config;
 222         }
 223
 224         cfg.build();
 225
 226         t!(t!(File::create(&done_stamp)).write_all(rebuild_trigger_contents.as_bytes()));
 227
 228         build_llvm_config
 229     }
 230 }
 231
 232 fn check_llvm_version(builder: &Builder, llvm_config: &Path) {
 233     if !builder.config.llvm_version_check {
 234         return
 235     }
 236
 237     if builder.config.dry_run {
 238         return;
 239     }
 240
 241     let mut cmd = Command::new(llvm_config);
 242     let version = output(cmd.arg("--version"));
 243     let mut parts = version.split('.').take(2)
 244         .filter_map(|s| s.parse::<u32>().ok());
 245     if let (Some(major), Some(minor)) = (parts.next(), parts.next()) {
 246         if major > 3 || (major == 3 && minor >= 9) {
 247             return
 248         }
 249     }
 250     panic!("\n\nbad LLVM version: {}, need >=3.9\n\n", version)
 251 }
 252
 253 fn configure_cmake(builder: &Builder,
 254                    target: Interned<String>,
 255                    cfg: &mut cmake::Config,
 256                    building_dist_binaries: bool) {
 257     if builder.config.ninja {
 258         cfg.generator("Ninja");
 259     }
 260     cfg.target(&target)
 261        .host(&builder.config.build);
 262
 263     let sanitize_cc = |cc: &Path| {
 264         if target.contains("msvc") {
 265             OsString::from(cc.to_str().unwrap().replace("\\", "/"))
 266         } else {
 267             cc.as_os_str().to_owned()
 268         }
 269     };
 270
 271     // MSVC with CMake uses msbuild by default which doesn't respect these
 272     // vars that we'd otherwise configure. In that case we just skip this
 273     // entirely.
 274     if target.contains("msvc") && !builder.config.ninja {
 275         return
 276     }
 277
 278     let cc = builder.cc(target);
 279     let cxx = builder.cxx(target).unwrap();
 280
 281     // Handle msvc + ninja + ccache specially (this is what the bots use)
 282     if target.contains("msvc") &&
 283        builder.config.ninja &&
 284        builder.config.ccache.is_some() {
 285         let mut cc = env::current_exe().expect("failed to get cwd");
 286         cc.set_file_name("sccache-plus-cl.exe");
 287
 288        cfg.define("CMAKE_C_COMPILER", sanitize_cc(&cc))
 289           .define("CMAKE_CXX_COMPILER", sanitize_cc(&cc));
 290        cfg.env("SCCACHE_PATH",
 291                builder.config.ccache.as_ref().unwrap())
 292           .env("SCCACHE_TARGET", target);
 293
 294     // If ccache is configured we inform the build a little differently hwo
 295     // to invoke ccache while also invoking our compilers.
 296     } else if let Some(ref ccache) = builder.config.ccache {
 297        cfg.define("CMAKE_C_COMPILER", ccache)
 298           .define("CMAKE_C_COMPILER_ARG1", sanitize_cc(cc))
 299           .define("CMAKE_CXX_COMPILER", ccache)
 300           .define("CMAKE_CXX_COMPILER_ARG1", sanitize_cc(cxx));
 301     } else {
 302        cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
 303           .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx));
 304     }
 305
 306     cfg.build_arg("-j").build_arg(builder.jobs().to_string());
 307     cfg.define("CMAKE_C_FLAGS", builder.cflags(target).join(" "));
 308     let mut cxxflags = builder.cflags(target).join(" ");
 309     if building_dist_binaries {
 310         if builder.config.llvm_static_stdcpp && !target.contains("windows") {
 311             cxxflags.push_str(" -static-libstdc++");
 312         }
 313     }
 314     cfg.define("CMAKE_CXX_FLAGS", cxxflags);
 315     if let Some(ar) = builder.ar(target) {
 316         if ar.is_absolute() {
 317             // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
 318             // tries to resolve this path in the LLVM build directory.
 319             cfg.define("CMAKE_AR", sanitize_cc(ar));
 320         }
 321     }
 322
 323     if env::var_os("SCCACHE_ERROR_LOG").is_some() {
 324         cfg.env("RUST_LOG", "sccache=warn");
 325     }
 326 }
 327
 328 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 329 pub struct Lld {
 330     pub target: Interned<String>,
 331 }
 332
 333 impl Step for Lld {
 334     type Output = PathBuf;
 335     const ONLY_HOSTS: bool = true;
 336
 337     fn should_run(run: ShouldRun) -> ShouldRun {
 338         run.path("src/tools/lld")
 339     }
 340
 341     fn make_run(run: RunConfig) {
 342         run.builder.ensure(Lld { target: run.target });
 343     }
 344
 345     /// Compile LLVM for `target`.
 346     fn run(self, builder: &Builder) -> PathBuf {
 347         if builder.config.dry_run {
 348             return PathBuf::from("lld-out-dir-test-gen");
 349         }
 350         let target = self.target;
 351
 352         let llvm_config = builder.ensure(Llvm {
 353             target: self.target,
 354             emscripten: false,
 355         });
 356
 357         let out_dir = builder.lld_out(target);
 358         let done_stamp = out_dir.join("lld-finished-building");
 359         if done_stamp.exists() {
 360             return out_dir
 361         }
 362
 363         let _folder = builder.fold_output(|| "lld");
 364         builder.info(&format!("Building LLD for {}", target));
 365         let _time = util::timeit(&builder);
 366         t!(fs::create_dir_all(&out_dir));
 367
 368         let mut cfg = cmake::Config::new(builder.src.join("src/tools/lld"));
 369         configure_cmake(builder, target, &mut cfg, true);
 370
 371         cfg.out_dir(&out_dir)
 372            .profile("Release")
 373            .define("LLVM_CONFIG_PATH", llvm_config)
 374            .define("LLVM_INCLUDE_TESTS", "OFF");
 375
 376         cfg.build();
 377
 378         t!(File::create(&done_stamp));
 379         out_dir
 380     }
 381 }
 382
 383 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 384 pub struct TestHelpers {
 385     pub target: Interned<String>,
 386 }
 387
 388 impl Step for TestHelpers {
 389     type Output = ();
 390
 391     fn should_run(run: ShouldRun) -> ShouldRun {
 392         run.path("src/test/auxiliary/rust_test_helpers.c")
 393     }
 394
 395     fn make_run(run: RunConfig) {
 396         run.builder.ensure(TestHelpers { target: run.target })
 397     }
 398
 399     /// Compiles the `rust_test_helpers.c` library which we used in various
 400     /// `run-pass` test suites for ABI testing.
 401     fn run(self, builder: &Builder) {
 402         if builder.config.dry_run {
 403             return;
 404         }
 405         let target = self.target;
 406         let dst = builder.test_helpers_out(target);
 407         let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
 408         if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
 409             return
 410         }
 411
 412         let _folder = builder.fold_output(|| "build_test_helpers");
 413         builder.info(&format!("Building test helpers"));
 414         t!(fs::create_dir_all(&dst));
 415         let mut cfg = cc::Build::new();
 416
 417         // We may have found various cross-compilers a little differently due to our
 418         // extra configuration, so inform gcc of these compilers. Note, though, that
 419         // on MSVC we still need gcc's detection of env vars (ugh).
 420         if !target.contains("msvc") {
 421             if let Some(ar) = builder.ar(target) {
 422                 cfg.archiver(ar);
 423             }
 424             cfg.compiler(builder.cc(target));
 425         }
 426
 427         cfg.cargo_metadata(false)
 428            .out_dir(&dst)
 429            .target(&target)
 430            .host(&builder.config.build)
 431            .opt_level(0)
 432            .warnings(false)
 433            .debug(false)
 434            .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
 435            .compile("rust_test_helpers");
 436     }
 437 }
 438
 439 const OPENSSL_VERS: &'static str = "1.0.2n";
 440 const OPENSSL_SHA256: &'static str =
 441     "370babb75f278c39e0c50e8c4e7493bc0f18db6867478341a832a982fd15a8fe";
 442
 443 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 444 pub struct Openssl {
 445     pub target: Interned<String>,
 446 }
 447
 448 impl Step for Openssl {
 449     type Output = ();
 450
 451     fn should_run(run: ShouldRun) -> ShouldRun {
 452         run.never()
 453     }
 454
 455     fn run(self, builder: &Builder) {
 456         if builder.config.dry_run {
 457             return;
 458         }
 459         let target = self.target;
 460         let out = match builder.openssl_dir(target) {
 461             Some(dir) => dir,
 462             None => return,
 463         };
 464
 465         let stamp = out.join(".stamp");
 466         let mut contents = String::new();
 467         drop(File::open(&stamp).and_then(|mut f| f.read_to_string(&mut contents)));
 468         if contents == OPENSSL_VERS {
 469             return
 470         }
 471         t!(fs::create_dir_all(&out));
 472
 473         let name = format!("openssl-{}.tar.gz", OPENSSL_VERS);
 474         let tarball = out.join(&name);
 475         if !tarball.exists() {
 476             let tmp = tarball.with_extension("tmp");
 477             // originally from https://www.openssl.org/source/...
 478             let url = format!("https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/{}",
 479                               name);
 480             let mut last_error = None;
 481             for _ in 0..3 {
 482                 let status = Command::new("curl")
 483                                 .arg("-o").arg(&tmp)
 484                                 .arg("-f")  // make curl fail if the URL does not return HTTP 200
 485                                 .arg(&url)
 486                                 .status()
 487                                 .expect("failed to spawn curl");
 488
 489                 // Retry if download failed.
 490                 if !status.success() {
 491                     last_error = Some(status.to_string());
 492                     continue;
 493                 }
 494
 495                 // Ensure the hash is correct.
 496                 let mut shasum = if target.contains("apple") ||
 497                     builder.config.build.contains("netbsd") {
 498                     let mut cmd = Command::new("shasum");
 499                     cmd.arg("-a").arg("256");
 500                     cmd
 501                 } else {
 502                     Command::new("sha256sum")
 503                 };
 504                 let output = output(&mut shasum.arg(&tmp));
 505                 let found = output.split_whitespace().next().unwrap();
 506
 507                 // If the hash is wrong, probably the download is incomplete or S3 served an error
 508                 // page. In any case, retry.
 509                 if found != OPENSSL_SHA256 {
 510                     last_error = Some(format!(
 511                         "downloaded openssl sha256 different\n\
 512                          expected: {}\n\
 513                          found:    {}\n",
 514                         OPENSSL_SHA256,
 515                         found
 516                     ));
 517                     continue;
 518                 }
 519
 520                 // Everything is fine, so exit the retry loop.
 521                 last_error = None;
 522                 break;
 523             }
 524             if let Some(error) = last_error {
 525                 panic!("failed to download openssl source: {}", error);
 526             }
 527             t!(fs::rename(&tmp, &tarball));
 528         }
 529         let obj = out.join(format!("openssl-{}", OPENSSL_VERS));
 530         let dst = builder.openssl_install_dir(target).unwrap();
 531         drop(fs::remove_dir_all(&obj));
 532         drop(fs::remove_dir_all(&dst));
 533         builder.run(Command::new("tar").arg("zxf").arg(&tarball).current_dir(&out));
 534
 535         let mut configure = Command::new("perl");
 536         configure.arg(obj.join("Configure"));
 537         configure.arg(format!("--prefix={}", dst.display()));
 538         configure.arg("no-dso");
 539         configure.arg("no-ssl2");
 540         configure.arg("no-ssl3");
 541
 542         let os = match &*target {
 543             "aarch64-linux-android" => "linux-aarch64",
 544             "aarch64-unknown-linux-gnu" => "linux-aarch64",
 545             "aarch64-unknown-linux-musl" => "linux-aarch64",
 546             "arm-linux-androideabi" => "android",
 547             "arm-unknown-linux-gnueabi" => "linux-armv4",
 548             "arm-unknown-linux-gnueabihf" => "linux-armv4",
 549             "armv7-linux-androideabi" => "android-armv7",
 550             "armv7-unknown-linux-gnueabihf" => "linux-armv4",
 551             "i586-unknown-linux-gnu" => "linux-elf",
 552             "i586-unknown-linux-musl" => "linux-elf",
 553             "i686-apple-darwin" => "darwin-i386-cc",
 554             "i686-linux-android" => "android-x86",
 555             "i686-unknown-freebsd" => "BSD-x86-elf",
 556             "i686-unknown-linux-gnu" => "linux-elf",
 557             "i686-unknown-linux-musl" => "linux-elf",
 558             "i686-unknown-netbsd" => "BSD-x86-elf",
 559             "mips-unknown-linux-gnu" => "linux-mips32",
 560             "mips64-unknown-linux-gnuabi64" => "linux64-mips64",
 561             "mips64el-unknown-linux-gnuabi64" => "linux64-mips64",
 562             "mipsel-unknown-linux-gnu" => "linux-mips32",
 563             "powerpc-unknown-linux-gnu" => "linux-ppc",
 564             "powerpc-unknown-linux-gnuspe" => "linux-ppc",
 565             "powerpc-unknown-netbsd" => "BSD-generic32",
 566             "powerpc64-unknown-linux-gnu" => "linux-ppc64",
 567             "powerpc64le-unknown-linux-gnu" => "linux-ppc64le",
 568             "s390x-unknown-linux-gnu" => "linux64-s390x",
 569             "sparc-unknown-linux-gnu" => "linux-sparcv9",
 570             "sparc64-unknown-linux-gnu" => "linux64-sparcv9",
 571             "sparc64-unknown-netbsd" => "BSD-sparc64",
 572             "x86_64-apple-darwin" => "darwin64-x86_64-cc",
 573             "x86_64-linux-android" => "linux-x86_64",
 574             "x86_64-unknown-freebsd" => "BSD-x86_64",
 575             "x86_64-unknown-dragonfly" => "BSD-x86_64",
 576             "x86_64-unknown-linux-gnu" => "linux-x86_64",
 577             "x86_64-unknown-linux-gnux32" => "linux-x32",
 578             "x86_64-unknown-linux-musl" => "linux-x86_64",
 579             "x86_64-unknown-netbsd" => "BSD-x86_64",
 580             _ => panic!("don't know how to configure OpenSSL for {}", target),
 581         };
 582         configure.arg(os);
 583         configure.env("CC", builder.cc(target));
 584         for flag in builder.cflags(target) {
 585             configure.arg(flag);
 586         }
 587         // There is no specific os target for android aarch64 or x86_64,
 588         // so we need to pass some extra cflags
 589         if target == "aarch64-linux-android" || target == "x86_64-linux-android" {
 590             configure.arg("-mandroid");
 591             configure.arg("-fomit-frame-pointer");
 592         }
 593         if target == "sparc64-unknown-netbsd" {
 594             // Need -m64 to get assembly generated correctly for sparc64.
 595             configure.arg("-m64");
 596             if builder.config.build.contains("netbsd") {
 597                 // Disable sparc64 asm on NetBSD builders, it uses
 598                 // m4(1)'s -B flag, which NetBSD m4 does not support.
 599                 configure.arg("no-asm");
 600             }
 601         }
 602         // Make PIE binaries
 603         // Non-PIE linker support was removed in Lollipop
 604         // https://source.android.com/security/enhancements/enhancements50
 605         if target == "i686-linux-android" {
 606             configure.arg("no-asm");
 607         }
 608         configure.current_dir(&obj);
 609         builder.info(&format!("Configuring openssl for {}", target));
 610         builder.run_quiet(&mut configure);
 611         builder.info(&format!("Building openssl for {}", target));
 612         builder.run_quiet(Command::new("make").arg("-j1").current_dir(&obj));
 613         builder.info(&format!("Installing openssl for {}", target));
 614         builder.run_quiet(Command::new("make").arg("install").arg("-j1").current_dir(&obj));
 615
 616         let mut f = t!(File::create(&stamp));
 617         t!(f.write_all(OPENSSL_VERS.as_bytes()));
 618     }
 619 }