src/bootstrap/config.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 //! Serialized configuration of a build.
  12 //!
  13 //! This module implements parsing `config.mk` and `config.toml` configuration
  14 //! files to tweak how the build runs.
  15
  16 use std::collections::HashMap;
  17 use std::env;
  18 use std::fs::{self, File};
  19 use std::io::prelude::*;
  20 use std::path::PathBuf;
  21 use std::process;
  22 use std::cmp;
  23
  24 use num_cpus;
  25 use toml;
  26 use util::{exe, push_exe_path};
  27 use cache::{INTERNER, Interned};
  28 use flags::Flags;
  29 pub use flags::Subcommand;
  30
  31 /// Global configuration for the entire build and/or bootstrap.
  32 ///
  33 /// This structure is derived from a combination of both `config.toml` and
  34 /// `config.mk`. As of the time of this writing it's unlikely that `config.toml`
  35 /// is used all that much, so this is primarily filled out by `config.mk` which
  36 /// is generated from `./configure`.
  37 ///
  38 /// Note that this structure is not decoded directly into, but rather it is
  39 /// filled out from the decoded forms of the structs below. For documentation
  40 /// each field, see the corresponding fields in
  41 /// `config.toml.example`.
  42 #[derive(Default)]
  43 pub struct Config {
  44     pub ccache: Option<String>,
  45     pub ninja: bool,
  46     pub verbose: usize,
  47     pub submodules: bool,
  48     pub compiler_docs: bool,
  49     pub docs: bool,
  50     pub locked_deps: bool,
  51     pub vendor: bool,
  52     pub target_config: HashMap<Interned<String>, Target>,
  53     pub full_bootstrap: bool,
  54     pub extended: bool,
  55     pub sanitizers: bool,
  56     pub profiler: bool,
  57     pub ignore_git: bool,
  58
  59     pub on_fail: Option<String>,
  60     pub stage: Option<u32>,
  61     pub keep_stage: Option<u32>,
  62     pub src: PathBuf,
  63     pub jobs: Option<u32>,
  64     pub cmd: Subcommand,
  65     pub incremental: bool,
  66
  67     // llvm codegen options
  68     pub llvm_enabled: bool,
  69     pub llvm_assertions: bool,
  70     pub llvm_optimize: bool,
  71     pub llvm_release_debuginfo: bool,
  72     pub llvm_version_check: bool,
  73     pub llvm_static_stdcpp: bool,
  74     pub llvm_link_shared: bool,
  75     pub llvm_targets: Option<String>,
  76     pub llvm_experimental_targets: Option<String>,
  77     pub llvm_link_jobs: Option<u32>,
  78
  79     // rust codegen options
  80     pub rust_optimize: bool,
  81     pub rust_codegen_units: u32,
  82     pub rust_debug_assertions: bool,
  83     pub rust_debuginfo: bool,
  84     pub rust_debuginfo_lines: bool,
  85     pub rust_debuginfo_only_std: bool,
  86     pub rust_rpath: bool,
  87     pub rustc_default_linker: Option<String>,
  88     pub rustc_default_ar: Option<String>,
  89     pub rust_optimize_tests: bool,
  90     pub rust_debuginfo_tests: bool,
  91     pub rust_dist_src: bool,
  92
  93     pub build: Interned<String>,
  94     pub hosts: Vec<Interned<String>>,
  95     pub targets: Vec<Interned<String>>,
  96     pub local_rebuild: bool,
  97
  98     // dist misc
  99     pub dist_sign_folder: Option<PathBuf>,
 100     pub dist_upload_addr: Option<String>,
 101     pub dist_gpg_password_file: Option<PathBuf>,
 102
 103     // libstd features
 104     pub debug_jemalloc: bool,
 105     pub use_jemalloc: bool,
 106     pub backtrace: bool, // support for RUST_BACKTRACE
 107
 108     // misc
 109     pub low_priority: bool,
 110     pub channel: String,
 111     pub quiet_tests: bool,
 112     // Fallback musl-root for all targets
 113     pub musl_root: Option<PathBuf>,
 114     pub prefix: Option<PathBuf>,
 115     pub sysconfdir: Option<PathBuf>,
 116     pub docdir: Option<PathBuf>,
 117     pub bindir: Option<PathBuf>,
 118     pub libdir: Option<PathBuf>,
 119     pub libdir_relative: Option<PathBuf>,
 120     pub mandir: Option<PathBuf>,
 121     pub codegen_tests: bool,
 122     pub nodejs: Option<PathBuf>,
 123     pub gdb: Option<PathBuf>,
 124     pub python: Option<PathBuf>,
 125     pub configure_args: Vec<String>,
 126     pub openssl_static: bool,
 127
 128
 129     // These are either the stage0 downloaded binaries or the locally installed ones.
 130     pub initial_cargo: PathBuf,
 131     pub initial_rustc: PathBuf,
 132
 133 }
 134
 135 /// Per-target configuration stored in the global configuration structure.
 136 #[derive(Default)]
 137 pub struct Target {
 138     /// Some(path to llvm-config) if using an external LLVM.
 139     pub llvm_config: Option<PathBuf>,
 140     pub jemalloc: Option<PathBuf>,
 141     pub cc: Option<PathBuf>,
 142     pub cxx: Option<PathBuf>,
 143     pub ndk: Option<PathBuf>,
 144     pub musl_root: Option<PathBuf>,
 145     pub qemu_rootfs: Option<PathBuf>,
 146 }
 147
 148 /// Structure of the `config.toml` file that configuration is read from.
 149 ///
 150 /// This structure uses `Decodable` to automatically decode a TOML configuration
 151 /// file into this format, and then this is traversed and written into the above
 152 /// `Config` structure.
 153 #[derive(Deserialize, Default)]
 154 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 155 struct TomlConfig {
 156     build: Option<Build>,
 157     install: Option<Install>,
 158     llvm: Option<Llvm>,
 159     rust: Option<Rust>,
 160     target: Option<HashMap<String, TomlTarget>>,
 161     dist: Option<Dist>,
 162 }
 163
 164 /// TOML representation of various global build decisions.
 165 #[derive(Deserialize, Default, Clone)]
 166 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 167 struct Build {
 168     build: Option<String>,
 169     #[serde(default)]
 170     host: Vec<String>,
 171     #[serde(default)]
 172     target: Vec<String>,
 173     cargo: Option<String>,
 174     rustc: Option<String>,
 175     low_priority: Option<bool>,
 176     compiler_docs: Option<bool>,
 177     docs: Option<bool>,
 178     submodules: Option<bool>,
 179     gdb: Option<String>,
 180     locked_deps: Option<bool>,
 181     vendor: Option<bool>,
 182     nodejs: Option<String>,
 183     python: Option<String>,
 184     full_bootstrap: Option<bool>,
 185     extended: Option<bool>,
 186     verbose: Option<usize>,
 187     sanitizers: Option<bool>,
 188     profiler: Option<bool>,
 189     openssl_static: Option<bool>,
 190 }
 191
 192 /// TOML representation of various global install decisions.
 193 #[derive(Deserialize, Default, Clone)]
 194 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 195 struct Install {
 196     prefix: Option<String>,
 197     sysconfdir: Option<String>,
 198     docdir: Option<String>,
 199     bindir: Option<String>,
 200     libdir: Option<String>,
 201     mandir: Option<String>,
 202 }
 203
 204 /// TOML representation of how the LLVM build is configured.
 205 #[derive(Deserialize, Default)]
 206 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 207 struct Llvm {
 208     enabled: Option<bool>,
 209     ccache: Option<StringOrBool>,
 210     ninja: Option<bool>,
 211     assertions: Option<bool>,
 212     optimize: Option<bool>,
 213     release_debuginfo: Option<bool>,
 214     version_check: Option<bool>,
 215     static_libstdcpp: Option<bool>,
 216     targets: Option<String>,
 217     experimental_targets: Option<String>,
 218     link_jobs: Option<u32>,
 219 }
 220
 221 #[derive(Deserialize, Default, Clone)]
 222 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 223 struct Dist {
 224     sign_folder: Option<String>,
 225     gpg_password_file: Option<String>,
 226     upload_addr: Option<String>,
 227     src_tarball: Option<bool>,
 228 }
 229
 230 #[derive(Deserialize)]
 231 #[serde(untagged)]
 232 enum StringOrBool {
 233     String(String),
 234     Bool(bool),
 235 }
 236
 237 impl Default for StringOrBool {
 238     fn default() -> StringOrBool {
 239         StringOrBool::Bool(false)
 240     }
 241 }
 242
 243 /// TOML representation of how the Rust build is configured.
 244 #[derive(Deserialize, Default)]
 245 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 246 struct Rust {
 247     optimize: Option<bool>,
 248     codegen_units: Option<u32>,
 249     debug_assertions: Option<bool>,
 250     debuginfo: Option<bool>,
 251     debuginfo_lines: Option<bool>,
 252     debuginfo_only_std: Option<bool>,
 253     debug_jemalloc: Option<bool>,
 254     use_jemalloc: Option<bool>,
 255     backtrace: Option<bool>,
 256     default_linker: Option<String>,
 257     default_ar: Option<String>,
 258     channel: Option<String>,
 259     musl_root: Option<String>,
 260     rpath: Option<bool>,
 261     optimize_tests: Option<bool>,
 262     debuginfo_tests: Option<bool>,
 263     codegen_tests: Option<bool>,
 264     ignore_git: Option<bool>,
 265 }
 266
 267 /// TOML representation of how each build target is configured.
 268 #[derive(Deserialize, Default)]
 269 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 270 struct TomlTarget {
 271     llvm_config: Option<String>,
 272     jemalloc: Option<String>,
 273     cc: Option<String>,
 274     cxx: Option<String>,
 275     android_ndk: Option<String>,
 276     musl_root: Option<String>,
 277     qemu_rootfs: Option<String>,
 278 }
 279
 280 impl Config {
 281     pub fn parse(args: &[String]) -> Config {
 282         let flags = Flags::parse(&args);
 283         let file = flags.config.clone();
 284         let mut config = Config::default();
 285         config.llvm_enabled = true;
 286         config.llvm_optimize = true;
 287         config.use_jemalloc = true;
 288         config.backtrace = true;
 289         config.rust_optimize = true;
 290         config.rust_optimize_tests = true;
 291         config.submodules = true;
 292         config.docs = true;
 293         config.rust_rpath = true;
 294         config.rust_codegen_units = 1;
 295         config.channel = "dev".to_string();
 296         config.codegen_tests = true;
 297         config.ignore_git = false;
 298         config.rust_dist_src = true;
 299
 300         config.on_fail = flags.on_fail;
 301         config.stage = flags.stage;
 302         config.src = flags.src;
 303         config.jobs = flags.jobs;
 304         config.cmd = flags.cmd;
 305         config.incremental = flags.incremental;
 306         config.keep_stage = flags.keep_stage;
 307
 308         let toml = file.map(|file| {
 309             let mut f = t!(File::open(&file));
 310             let mut contents = String::new();
 311             t!(f.read_to_string(&mut contents));
 312             match toml::from_str(&contents) {
 313                 Ok(table) => table,
 314                 Err(err) => {
 315                     println!("failed to parse TOML configuration '{}': {}",
 316                         file.display(), err);
 317                     process::exit(2);
 318                 }
 319             }
 320         }).unwrap_or_else(|| TomlConfig::default());
 321
 322         let build = toml.build.clone().unwrap_or(Build::default());
 323         set(&mut config.build, build.build.clone().map(|x| INTERNER.intern_string(x)));
 324         set(&mut config.build, flags.build);
 325         if config.build.is_empty() {
 326             // set by bootstrap.py
 327             config.build = INTERNER.intern_str(&env::var("BUILD").unwrap());
 328         }
 329         config.hosts.push(config.build.clone());
 330         for host in build.host.iter() {
 331             let host = INTERNER.intern_str(host);
 332             if !config.hosts.contains(&host) {
 333                 config.hosts.push(host);
 334             }
 335         }
 336         for target in config.hosts.iter().cloned()
 337             .chain(build.target.iter().map(|s| INTERNER.intern_str(s)))
 338         {
 339             if !config.targets.contains(&target) {
 340                 config.targets.push(target);
 341             }
 342         }
 343         config.hosts = if !flags.host.is_empty() {
 344             flags.host
 345         } else {
 346             config.hosts
 347         };
 348         config.targets = if !flags.target.is_empty() {
 349             flags.target
 350         } else {
 351             config.targets
 352         };
 353
 354         config.nodejs = build.nodejs.map(PathBuf::from);
 355         config.gdb = build.gdb.map(PathBuf::from);
 356         config.python = build.python.map(PathBuf::from);
 357         set(&mut config.low_priority, build.low_priority);
 358         set(&mut config.compiler_docs, build.compiler_docs);
 359         set(&mut config.docs, build.docs);
 360         set(&mut config.submodules, build.submodules);
 361         set(&mut config.locked_deps, build.locked_deps);
 362         set(&mut config.vendor, build.vendor);
 363         set(&mut config.full_bootstrap, build.full_bootstrap);
 364         set(&mut config.extended, build.extended);
 365         set(&mut config.verbose, build.verbose);
 366         set(&mut config.sanitizers, build.sanitizers);
 367         set(&mut config.profiler, build.profiler);
 368         set(&mut config.openssl_static, build.openssl_static);
 369         config.verbose = cmp::max(config.verbose, flags.verbose);
 370
 371         if let Some(ref install) = toml.install {
 372             config.prefix = install.prefix.clone().map(PathBuf::from);
 373             config.sysconfdir = install.sysconfdir.clone().map(PathBuf::from);
 374             config.docdir = install.docdir.clone().map(PathBuf::from);
 375             config.bindir = install.bindir.clone().map(PathBuf::from);
 376             config.libdir = install.libdir.clone().map(PathBuf::from);
 377             config.mandir = install.mandir.clone().map(PathBuf::from);
 378         }
 379
 380         if let Some(ref llvm) = toml.llvm {
 381             match llvm.ccache {
 382                 Some(StringOrBool::String(ref s)) => {
 383                     config.ccache = Some(s.to_string())
 384                 }
 385                 Some(StringOrBool::Bool(true)) => {
 386                     config.ccache = Some("ccache".to_string());
 387                 }
 388                 Some(StringOrBool::Bool(false)) | None => {}
 389             }
 390             set(&mut config.ninja, llvm.ninja);
 391             set(&mut config.llvm_enabled, llvm.enabled);
 392             set(&mut config.llvm_assertions, llvm.assertions);
 393             set(&mut config.llvm_optimize, llvm.optimize);
 394             set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
 395             set(&mut config.llvm_version_check, llvm.version_check);
 396             set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
 397             config.llvm_targets = llvm.targets.clone();
 398             config.llvm_experimental_targets = llvm.experimental_targets.clone();
 399             config.llvm_link_jobs = llvm.link_jobs;
 400         }
 401
 402         if let Some(ref rust) = toml.rust {
 403             set(&mut config.rust_debug_assertions, rust.debug_assertions);
 404             set(&mut config.rust_debuginfo, rust.debuginfo);
 405             set(&mut config.rust_debuginfo_lines, rust.debuginfo_lines);
 406             set(&mut config.rust_debuginfo_only_std, rust.debuginfo_only_std);
 407             set(&mut config.rust_optimize, rust.optimize);
 408             set(&mut config.rust_optimize_tests, rust.optimize_tests);
 409             set(&mut config.rust_debuginfo_tests, rust.debuginfo_tests);
 410             set(&mut config.codegen_tests, rust.codegen_tests);
 411             set(&mut config.rust_rpath, rust.rpath);
 412             set(&mut config.debug_jemalloc, rust.debug_jemalloc);
 413             set(&mut config.use_jemalloc, rust.use_jemalloc);
 414             set(&mut config.backtrace, rust.backtrace);
 415             set(&mut config.channel, rust.channel.clone());
 416             set(&mut config.ignore_git, rust.ignore_git);
 417             config.rustc_default_linker = rust.default_linker.clone();
 418             config.rustc_default_ar = rust.default_ar.clone();
 419             config.musl_root = rust.musl_root.clone().map(PathBuf::from);
 420
 421             match rust.codegen_units {
 422                 Some(0) => config.rust_codegen_units = num_cpus::get() as u32,
 423                 Some(n) => config.rust_codegen_units = n,
 424                 None => {}
 425             }
 426         }
 427
 428         if let Some(ref t) = toml.target {
 429             for (triple, cfg) in t {
 430                 let mut target = Target::default();
 431
 432                 if let Some(ref s) = cfg.llvm_config {
 433                     target.llvm_config = Some(env::current_dir().unwrap().join(s));
 434                 }
 435                 if let Some(ref s) = cfg.jemalloc {
 436                     target.jemalloc = Some(env::current_dir().unwrap().join(s));
 437                 }
 438                 if let Some(ref s) = cfg.android_ndk {
 439                     target.ndk = Some(env::current_dir().unwrap().join(s));
 440                 }
 441                 target.cxx = cfg.cxx.clone().map(PathBuf::from);
 442                 target.cc = cfg.cc.clone().map(PathBuf::from);
 443                 target.musl_root = cfg.musl_root.clone().map(PathBuf::from);
 444                 target.qemu_rootfs = cfg.qemu_rootfs.clone().map(PathBuf::from);
 445
 446                 config.target_config.insert(INTERNER.intern_string(triple.clone()), target);
 447             }
 448         }
 449
 450         if let Some(ref t) = toml.dist {
 451             config.dist_sign_folder = t.sign_folder.clone().map(PathBuf::from);
 452             config.dist_gpg_password_file = t.gpg_password_file.clone().map(PathBuf::from);
 453             config.dist_upload_addr = t.upload_addr.clone();
 454             set(&mut config.rust_dist_src, t.src_tarball);
 455         }
 456
 457         let cwd = t!(env::current_dir());
 458         let out = cwd.join("build");
 459
 460         let stage0_root = out.join(&config.build).join("stage0/bin");
 461         config.initial_rustc = match build.rustc {
 462             Some(s) => PathBuf::from(s),
 463             None => stage0_root.join(exe("rustc", &config.build)),
 464         };
 465         config.initial_cargo = match build.cargo {
 466             Some(s) => PathBuf::from(s),
 467             None => stage0_root.join(exe("cargo", &config.build)),
 468         };
 469
 470         // compat with `./configure` while we're still using that
 471         if fs::metadata("config.mk").is_ok() {
 472             config.update_with_config_mk();
 473         }
 474
 475         config
 476     }
 477
 478     /// "Temporary" routine to parse `config.mk` into this configuration.
 479     ///
 480     /// While we still have `./configure` this implements the ability to decode
 481     /// that configuration into this. This isn't exactly a full-blown makefile
 482     /// parser, but hey it gets the job done!
 483     fn update_with_config_mk(&mut self) {
 484         let mut config = String::new();
 485         File::open("config.mk").unwrap().read_to_string(&mut config).unwrap();
 486         for line in config.lines() {
 487             let mut parts = line.splitn(2, ":=").map(|s| s.trim());
 488             let key = parts.next().unwrap();
 489             let value = match parts.next() {
 490                 Some(n) if n.starts_with('\"') => &n[1..n.len() - 1],
 491                 Some(n) => n,
 492                 None => continue
 493             };
 494
 495             macro_rules! check {
 496                 ($(($name:expr, $val:expr),)*) => {
 497                     if value == "1" {
 498                         $(
 499                             if key == concat!("CFG_ENABLE_", $name) {
 500                                 $val = true;
 501                                 continue
 502                             }
 503                             if key == concat!("CFG_DISABLE_", $name) {
 504                                 $val = false;
 505                                 continue
 506                             }
 507                         )*
 508                     }
 509                 }
 510             }
 511
 512             check! {
 513                 ("MANAGE_SUBMODULES", self.submodules),
 514                 ("COMPILER_DOCS", self.compiler_docs),
 515                 ("DOCS", self.docs),
 516                 ("LLVM_ASSERTIONS", self.llvm_assertions),
 517                 ("LLVM_RELEASE_DEBUGINFO", self.llvm_release_debuginfo),
 518                 ("OPTIMIZE_LLVM", self.llvm_optimize),
 519                 ("LLVM_VERSION_CHECK", self.llvm_version_check),
 520                 ("LLVM_STATIC_STDCPP", self.llvm_static_stdcpp),
 521                 ("LLVM_LINK_SHARED", self.llvm_link_shared),
 522                 ("OPTIMIZE", self.rust_optimize),
 523                 ("DEBUG_ASSERTIONS", self.rust_debug_assertions),
 524                 ("DEBUGINFO", self.rust_debuginfo),
 525                 ("DEBUGINFO_LINES", self.rust_debuginfo_lines),
 526                 ("DEBUGINFO_ONLY_STD", self.rust_debuginfo_only_std),
 527                 ("JEMALLOC", self.use_jemalloc),
 528                 ("DEBUG_JEMALLOC", self.debug_jemalloc),
 529                 ("RPATH", self.rust_rpath),
 530                 ("OPTIMIZE_TESTS", self.rust_optimize_tests),
 531                 ("DEBUGINFO_TESTS", self.rust_debuginfo_tests),
 532                 ("QUIET_TESTS", self.quiet_tests),
 533                 ("LOCAL_REBUILD", self.local_rebuild),
 534                 ("NINJA", self.ninja),
 535                 ("CODEGEN_TESTS", self.codegen_tests),
 536                 ("LOCKED_DEPS", self.locked_deps),
 537                 ("VENDOR", self.vendor),
 538                 ("FULL_BOOTSTRAP", self.full_bootstrap),
 539                 ("EXTENDED", self.extended),
 540                 ("SANITIZERS", self.sanitizers),
 541                 ("PROFILER", self.profiler),
 542                 ("DIST_SRC", self.rust_dist_src),
 543                 ("CARGO_OPENSSL_STATIC", self.openssl_static),
 544             }
 545
 546             match key {
 547                 "CFG_BUILD" if value.len() > 0 => self.build = INTERNER.intern_str(value),
 548                 "CFG_HOST" if value.len() > 0 => {
 549                     self.hosts.extend(value.split(" ").map(|s| INTERNER.intern_str(s)));
 550
 551                 }
 552                 "CFG_TARGET" if value.len() > 0 => {
 553                     self.targets.extend(value.split(" ").map(|s| INTERNER.intern_str(s)));
 554                 }
 555                 "CFG_EXPERIMENTAL_TARGETS" if value.len() > 0 => {
 556                     self.llvm_experimental_targets = Some(value.to_string());
 557                 }
 558                 "CFG_MUSL_ROOT" if value.len() > 0 => {
 559                     self.musl_root = Some(parse_configure_path(value));
 560                 }
 561                 "CFG_MUSL_ROOT_X86_64" if value.len() > 0 => {
 562                     let target = INTERNER.intern_str("x86_64-unknown-linux-musl");
 563                     let target = self.target_config.entry(target).or_insert(Target::default());
 564                     target.musl_root = Some(parse_configure_path(value));
 565                 }
 566                 "CFG_MUSL_ROOT_I686" if value.len() > 0 => {
 567                     let target = INTERNER.intern_str("i686-unknown-linux-musl");
 568                     let target = self.target_config.entry(target).or_insert(Target::default());
 569                     target.musl_root = Some(parse_configure_path(value));
 570                 }
 571                 "CFG_MUSL_ROOT_ARM" if value.len() > 0 => {
 572                     let target = INTERNER.intern_str("arm-unknown-linux-musleabi");
 573                     let target = self.target_config.entry(target).or_insert(Target::default());
 574                     target.musl_root = Some(parse_configure_path(value));
 575                 }
 576                 "CFG_MUSL_ROOT_ARMHF" if value.len() > 0 => {
 577                     let target = INTERNER.intern_str("arm-unknown-linux-musleabihf");
 578                     let target = self.target_config.entry(target).or_insert(Target::default());
 579                     target.musl_root = Some(parse_configure_path(value));
 580                 }
 581                 "CFG_MUSL_ROOT_ARMV7" if value.len() > 0 => {
 582                     let target = INTERNER.intern_str("armv7-unknown-linux-musleabihf");
 583                     let target = self.target_config.entry(target).or_insert(Target::default());
 584                     target.musl_root = Some(parse_configure_path(value));
 585                 }
 586                 "CFG_DEFAULT_AR" if value.len() > 0 => {
 587                     self.rustc_default_ar = Some(value.to_string());
 588                 }
 589                 "CFG_DEFAULT_LINKER" if value.len() > 0 => {
 590                     self.rustc_default_linker = Some(value.to_string());
 591                 }
 592                 "CFG_GDB" if value.len() > 0 => {
 593                     self.gdb = Some(parse_configure_path(value));
 594                 }
 595                 "CFG_RELEASE_CHANNEL" => {
 596                     self.channel = value.to_string();
 597                 }
 598                 "CFG_PREFIX" => {
 599                     self.prefix = Some(PathBuf::from(value));
 600                 }
 601                 "CFG_SYSCONFDIR" => {
 602                     self.sysconfdir = Some(PathBuf::from(value));
 603                 }
 604                 "CFG_DOCDIR" => {
 605                     self.docdir = Some(PathBuf::from(value));
 606                 }
 607                 "CFG_BINDIR" => {
 608                     self.bindir = Some(PathBuf::from(value));
 609                 }
 610                 "CFG_LIBDIR" => {
 611                     self.libdir = Some(PathBuf::from(value));
 612                 }
 613                 "CFG_LIBDIR_RELATIVE" => {
 614                     self.libdir_relative = Some(PathBuf::from(value));
 615                 }
 616                 "CFG_MANDIR" => {
 617                     self.mandir = Some(PathBuf::from(value));
 618                 }
 619                 "CFG_LLVM_ROOT" if value.len() > 0 => {
 620                     let target = self.target_config.entry(self.build.clone())
 621                                      .or_insert(Target::default());
 622                     let root = parse_configure_path(value);
 623                     target.llvm_config = Some(push_exe_path(root, &["bin", "llvm-config"]));
 624                 }
 625                 "CFG_JEMALLOC_ROOT" if value.len() > 0 => {
 626                     let target = self.target_config.entry(self.build.clone())
 627                                      .or_insert(Target::default());
 628                     target.jemalloc = Some(parse_configure_path(value).join("libjemalloc_pic.a"));
 629                 }
 630                 "CFG_ARM_LINUX_ANDROIDEABI_NDK" if value.len() > 0 => {
 631                     let target = INTERNER.intern_str("arm-linux-androideabi");
 632                     let target = self.target_config.entry(target).or_insert(Target::default());
 633                     target.ndk = Some(parse_configure_path(value));
 634                 }
 635                 "CFG_ARMV7_LINUX_ANDROIDEABI_NDK" if value.len() > 0 => {
 636                     let target = INTERNER.intern_str("armv7-linux-androideabi");
 637                     let target = self.target_config.entry(target).or_insert(Target::default());
 638                     target.ndk = Some(parse_configure_path(value));
 639                 }
 640                 "CFG_I686_LINUX_ANDROID_NDK" if value.len() > 0 => {
 641                     let target = INTERNER.intern_str("i686-linux-android");
 642                     let target = self.target_config.entry(target).or_insert(Target::default());
 643                     target.ndk = Some(parse_configure_path(value));
 644                 }
 645                 "CFG_AARCH64_LINUX_ANDROID_NDK" if value.len() > 0 => {
 646                     let target = INTERNER.intern_str("aarch64-linux-android");
 647                     let target = self.target_config.entry(target).or_insert(Target::default());
 648                     target.ndk = Some(parse_configure_path(value));
 649                 }
 650                 "CFG_X86_64_LINUX_ANDROID_NDK" if value.len() > 0 => {
 651                     let target = INTERNER.intern_str("x86_64-linux-android");
 652                     let target = self.target_config.entry(target).or_insert(Target::default());
 653                     target.ndk = Some(parse_configure_path(value));
 654                 }
 655                 "CFG_LOCAL_RUST_ROOT" if value.len() > 0 => {
 656                     let path = parse_configure_path(value);
 657                     self.initial_rustc = push_exe_path(path.clone(), &["bin", "rustc"]);
 658                     self.initial_cargo = push_exe_path(path, &["bin", "cargo"]);
 659                 }
 660                 "CFG_PYTHON" if value.len() > 0 => {
 661                     let path = parse_configure_path(value);
 662                     self.python = Some(path);
 663                 }
 664                 "CFG_ENABLE_CCACHE" if value == "1" => {
 665                     self.ccache = Some(exe("ccache", &self.build));
 666                 }
 667                 "CFG_ENABLE_SCCACHE" if value == "1" => {
 668                     self.ccache = Some(exe("sccache", &self.build));
 669                 }
 670                 "CFG_CONFIGURE_ARGS" if value.len() > 0 => {
 671                     self.configure_args = value.split_whitespace()
 672                                                .map(|s| s.to_string())
 673                                                .collect();
 674                 }
 675                 "CFG_QEMU_ARMHF_ROOTFS" if value.len() > 0 => {
 676                     let target = INTERNER.intern_str("arm-unknown-linux-gnueabihf");
 677                     let target = self.target_config.entry(target).or_insert(Target::default());
 678                     target.qemu_rootfs = Some(parse_configure_path(value));
 679                 }
 680                 "CFG_QEMU_AARCH64_ROOTFS" if value.len() > 0 => {
 681                     let target = INTERNER.intern_str("aarch64-unknown-linux-gnu");
 682                     let target = self.target_config.entry(target).or_insert(Target::default());
 683                     target.qemu_rootfs = Some(parse_configure_path(value));
 684                 }
 685                 _ => {}
 686             }
 687         }
 688     }
 689
 690     pub fn verbose(&self) -> bool {
 691         self.verbose > 0
 692     }
 693
 694     pub fn very_verbose(&self) -> bool {
 695         self.verbose > 1
 696     }
 697 }
 698
 699 #[cfg(not(windows))]
 700 fn parse_configure_path(path: &str) -> PathBuf {
 701     path.into()
 702 }
 703
 704 #[cfg(windows)]
 705 fn parse_configure_path(path: &str) -> PathBuf {
 706     // on windows, configure produces unix style paths e.g. /c/some/path but we
 707     // only want real windows paths
 708
 709     use std::process::Command;
 710     use build_helper;
 711
 712     // '/' is invalid in windows paths, so we can detect unix paths by the presence of it
 713     if !path.contains('/') {
 714         return path.into();
 715     }
 716
 717     let win_path = build_helper::output(Command::new("cygpath").arg("-w").arg(path));
 718     let win_path = win_path.trim();
 719
 720     win_path.into()
 721 }
 722
 723 fn set<T>(field: &mut T, val: Option<T>) {
 724     if let Some(v) = val {
 725         *field = v;
 726     }
 727 }