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 run_host_only: bool,
  60
  61     pub on_fail: Option<String>,
  62     pub stage: Option<u32>,
  63     pub keep_stage: Option<u32>,
  64     pub src: PathBuf,
  65     pub jobs: Option<u32>,
  66     pub cmd: Subcommand,
  67     pub incremental: bool,
  68
  69     // llvm codegen options
  70     pub llvm_enabled: bool,
  71     pub llvm_assertions: bool,
  72     pub llvm_optimize: bool,
  73     pub llvm_release_debuginfo: bool,
  74     pub llvm_version_check: bool,
  75     pub llvm_static_stdcpp: bool,
  76     pub llvm_link_shared: bool,
  77     pub llvm_targets: Option<String>,
  78     pub llvm_experimental_targets: Option<String>,
  79     pub llvm_link_jobs: Option<u32>,
  80
  81     // rust codegen options
  82     pub rust_optimize: bool,
  83     pub rust_codegen_units: u32,
  84     pub rust_debug_assertions: bool,
  85     pub rust_debuginfo: bool,
  86     pub rust_debuginfo_lines: bool,
  87     pub rust_debuginfo_only_std: bool,
  88     pub rust_rpath: bool,
  89     pub rustc_default_linker: Option<String>,
  90     pub rustc_default_ar: Option<String>,
  91     pub rust_optimize_tests: bool,
  92     pub rust_debuginfo_tests: bool,
  93     pub rust_dist_src: bool,
  94
  95     pub build: Interned<String>,
  96     pub hosts: Vec<Interned<String>>,
  97     pub targets: Vec<Interned<String>>,
  98     pub local_rebuild: bool,
  99
 100     // dist misc
 101     pub dist_sign_folder: Option<PathBuf>,
 102     pub dist_upload_addr: Option<String>,
 103     pub dist_gpg_password_file: Option<PathBuf>,
 104
 105     // libstd features
 106     pub debug_jemalloc: bool,
 107     pub use_jemalloc: bool,
 108     pub backtrace: bool, // support for RUST_BACKTRACE
 109
 110     // misc
 111     pub low_priority: bool,
 112     pub channel: String,
 113     pub quiet_tests: bool,
 114     // Fallback musl-root for all targets
 115     pub musl_root: Option<PathBuf>,
 116     pub prefix: Option<PathBuf>,
 117     pub sysconfdir: Option<PathBuf>,
 118     pub docdir: Option<PathBuf>,
 119     pub bindir: Option<PathBuf>,
 120     pub libdir: Option<PathBuf>,
 121     pub libdir_relative: Option<PathBuf>,
 122     pub mandir: Option<PathBuf>,
 123     pub codegen_tests: bool,
 124     pub nodejs: Option<PathBuf>,
 125     pub gdb: Option<PathBuf>,
 126     pub python: Option<PathBuf>,
 127     pub configure_args: Vec<String>,
 128     pub openssl_static: bool,
 129
 130
 131     // These are either the stage0 downloaded binaries or the locally installed ones.
 132     pub initial_cargo: PathBuf,
 133     pub initial_rustc: PathBuf,
 134
 135 }
 136
 137 /// Per-target configuration stored in the global configuration structure.
 138 #[derive(Default)]
 139 pub struct Target {
 140     /// Some(path to llvm-config) if using an external LLVM.
 141     pub llvm_config: Option<PathBuf>,
 142     pub jemalloc: Option<PathBuf>,
 143     pub cc: Option<PathBuf>,
 144     pub cxx: Option<PathBuf>,
 145     pub ndk: Option<PathBuf>,
 146     pub musl_root: Option<PathBuf>,
 147     pub qemu_rootfs: Option<PathBuf>,
 148 }
 149
 150 /// Structure of the `config.toml` file that configuration is read from.
 151 ///
 152 /// This structure uses `Decodable` to automatically decode a TOML configuration
 153 /// file into this format, and then this is traversed and written into the above
 154 /// `Config` structure.
 155 #[derive(Deserialize, Default)]
 156 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 157 struct TomlConfig {
 158     build: Option<Build>,
 159     install: Option<Install>,
 160     llvm: Option<Llvm>,
 161     rust: Option<Rust>,
 162     target: Option<HashMap<String, TomlTarget>>,
 163     dist: Option<Dist>,
 164 }
 165
 166 /// TOML representation of various global build decisions.
 167 #[derive(Deserialize, Default, Clone)]
 168 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 169 struct Build {
 170     build: Option<String>,
 171     #[serde(default)]
 172     host: Vec<String>,
 173     #[serde(default)]
 174     target: Vec<String>,
 175     cargo: Option<String>,
 176     rustc: Option<String>,
 177     low_priority: Option<bool>,
 178     compiler_docs: Option<bool>,
 179     docs: Option<bool>,
 180     submodules: Option<bool>,
 181     gdb: Option<String>,
 182     locked_deps: Option<bool>,
 183     vendor: Option<bool>,
 184     nodejs: Option<String>,
 185     python: Option<String>,
 186     full_bootstrap: Option<bool>,
 187     extended: Option<bool>,
 188     verbose: Option<usize>,
 189     sanitizers: Option<bool>,
 190     profiler: Option<bool>,
 191     openssl_static: Option<bool>,
 192 }
 193
 194 /// TOML representation of various global install decisions.
 195 #[derive(Deserialize, Default, Clone)]
 196 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 197 struct Install {
 198     prefix: Option<String>,
 199     sysconfdir: Option<String>,
 200     docdir: Option<String>,
 201     bindir: Option<String>,
 202     libdir: Option<String>,
 203     mandir: Option<String>,
 204 }
 205
 206 /// TOML representation of how the LLVM build is configured.
 207 #[derive(Deserialize, Default)]
 208 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 209 struct Llvm {
 210     enabled: Option<bool>,
 211     ccache: Option<StringOrBool>,
 212     ninja: Option<bool>,
 213     assertions: Option<bool>,
 214     optimize: Option<bool>,
 215     release_debuginfo: Option<bool>,
 216     version_check: Option<bool>,
 217     static_libstdcpp: Option<bool>,
 218     targets: Option<String>,
 219     experimental_targets: Option<String>,
 220     link_jobs: Option<u32>,
 221 }
 222
 223 #[derive(Deserialize, Default, Clone)]
 224 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 225 struct Dist {
 226     sign_folder: Option<String>,
 227     gpg_password_file: Option<String>,
 228     upload_addr: Option<String>,
 229     src_tarball: Option<bool>,
 230 }
 231
 232 #[derive(Deserialize)]
 233 #[serde(untagged)]
 234 enum StringOrBool {
 235     String(String),
 236     Bool(bool),
 237 }
 238
 239 impl Default for StringOrBool {
 240     fn default() -> StringOrBool {
 241         StringOrBool::Bool(false)
 242     }
 243 }
 244
 245 /// TOML representation of how the Rust build is configured.
 246 #[derive(Deserialize, Default)]
 247 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 248 struct Rust {
 249     optimize: Option<bool>,
 250     codegen_units: Option<u32>,
 251     debug_assertions: Option<bool>,
 252     debuginfo: Option<bool>,
 253     debuginfo_lines: Option<bool>,
 254     debuginfo_only_std: Option<bool>,
 255     debug_jemalloc: Option<bool>,
 256     use_jemalloc: Option<bool>,
 257     backtrace: Option<bool>,
 258     default_linker: Option<String>,
 259     default_ar: Option<String>,
 260     channel: Option<String>,
 261     musl_root: Option<String>,
 262     rpath: Option<bool>,
 263     optimize_tests: Option<bool>,
 264     debuginfo_tests: Option<bool>,
 265     codegen_tests: Option<bool>,
 266     ignore_git: Option<bool>,
 267 }
 268
 269 /// TOML representation of how each build target is configured.
 270 #[derive(Deserialize, Default)]
 271 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 272 struct TomlTarget {
 273     llvm_config: Option<String>,
 274     jemalloc: Option<String>,
 275     cc: Option<String>,
 276     cxx: Option<String>,
 277     android_ndk: Option<String>,
 278     musl_root: Option<String>,
 279     qemu_rootfs: Option<String>,
 280 }
 281
 282 impl Config {
 283     pub fn parse(args: &[String]) -> Config {
 284         let flags = Flags::parse(&args);
 285         let file = flags.config.clone();
 286         let mut config = Config::default();
 287         config.llvm_enabled = true;
 288         config.llvm_optimize = true;
 289         config.use_jemalloc = true;
 290         config.backtrace = true;
 291         config.rust_optimize = true;
 292         config.rust_optimize_tests = true;
 293         config.submodules = true;
 294         config.docs = true;
 295         config.rust_rpath = true;
 296         config.rust_codegen_units = 1;
 297         config.channel = "dev".to_string();
 298         config.codegen_tests = true;
 299         config.ignore_git = false;
 300         config.rust_dist_src = true;
 301
 302         config.on_fail = flags.on_fail;
 303         config.stage = flags.stage;
 304         config.src = flags.src;
 305         config.jobs = flags.jobs;
 306         config.cmd = flags.cmd;
 307         config.incremental = flags.incremental;
 308         config.keep_stage = flags.keep_stage;
 309
 310         // If --target was specified but --host wasn't specified, don't run any host-only tests.
 311         config.run_host_only = flags.host.is_empty() && !flags.target.is_empty();
 312
 313         let toml = file.map(|file| {
 314             let mut f = t!(File::open(&file));
 315             let mut contents = String::new();
 316             t!(f.read_to_string(&mut contents));
 317             match toml::from_str(&contents) {
 318                 Ok(table) => table,
 319                 Err(err) => {
 320                     println!("failed to parse TOML configuration '{}': {}",
 321                         file.display(), err);
 322                     process::exit(2);
 323                 }
 324             }
 325         }).unwrap_or_else(|| TomlConfig::default());
 326
 327         let build = toml.build.clone().unwrap_or(Build::default());
 328         set(&mut config.build, build.build.clone().map(|x| INTERNER.intern_string(x)));
 329         set(&mut config.build, flags.build);
 330         if config.build.is_empty() {
 331             // set by bootstrap.py
 332             config.build = INTERNER.intern_str(&env::var("BUILD").unwrap());
 333         }
 334         config.hosts.push(config.build.clone());
 335         for host in build.host.iter() {
 336             let host = INTERNER.intern_str(host);
 337             if !config.hosts.contains(&host) {
 338                 config.hosts.push(host);
 339             }
 340         }
 341         for target in config.hosts.iter().cloned()
 342             .chain(build.target.iter().map(|s| INTERNER.intern_str(s)))
 343         {
 344             if !config.targets.contains(&target) {
 345                 config.targets.push(target);
 346             }
 347         }
 348         config.hosts = if !flags.host.is_empty() {
 349             flags.host
 350         } else {
 351             config.hosts
 352         };
 353         config.targets = if !flags.target.is_empty() {
 354             flags.target
 355         } else {
 356             config.targets
 357         };
 358
 359
 360         config.nodejs = build.nodejs.map(PathBuf::from);
 361         config.gdb = build.gdb.map(PathBuf::from);
 362         config.python = build.python.map(PathBuf::from);
 363         set(&mut config.low_priority, build.low_priority);
 364         set(&mut config.compiler_docs, build.compiler_docs);
 365         set(&mut config.docs, build.docs);
 366         set(&mut config.submodules, build.submodules);
 367         set(&mut config.locked_deps, build.locked_deps);
 368         set(&mut config.vendor, build.vendor);
 369         set(&mut config.full_bootstrap, build.full_bootstrap);
 370         set(&mut config.extended, build.extended);
 371         set(&mut config.verbose, build.verbose);
 372         set(&mut config.sanitizers, build.sanitizers);
 373         set(&mut config.profiler, build.profiler);
 374         set(&mut config.openssl_static, build.openssl_static);
 375         config.verbose = cmp::max(config.verbose, flags.verbose);
 376
 377         if let Some(ref install) = toml.install {
 378             config.prefix = install.prefix.clone().map(PathBuf::from);
 379             config.sysconfdir = install.sysconfdir.clone().map(PathBuf::from);
 380             config.docdir = install.docdir.clone().map(PathBuf::from);
 381             config.bindir = install.bindir.clone().map(PathBuf::from);
 382             config.libdir = install.libdir.clone().map(PathBuf::from);
 383             config.mandir = install.mandir.clone().map(PathBuf::from);
 384         }
 385
 386         if let Some(ref llvm) = toml.llvm {
 387             match llvm.ccache {
 388                 Some(StringOrBool::String(ref s)) => {
 389                     config.ccache = Some(s.to_string())
 390                 }
 391                 Some(StringOrBool::Bool(true)) => {
 392                     config.ccache = Some("ccache".to_string());
 393                 }
 394                 Some(StringOrBool::Bool(false)) | None => {}
 395             }
 396             set(&mut config.ninja, llvm.ninja);
 397             set(&mut config.llvm_enabled, llvm.enabled);
 398             set(&mut config.llvm_assertions, llvm.assertions);
 399             set(&mut config.llvm_optimize, llvm.optimize);
 400             set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
 401             set(&mut config.llvm_version_check, llvm.version_check);
 402             set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
 403             config.llvm_targets = llvm.targets.clone();
 404             config.llvm_experimental_targets = llvm.experimental_targets.clone();
 405             config.llvm_link_jobs = llvm.link_jobs;
 406         }
 407
 408         if let Some(ref rust) = toml.rust {
 409             set(&mut config.rust_debug_assertions, rust.debug_assertions);
 410             set(&mut config.rust_debuginfo, rust.debuginfo);
 411             set(&mut config.rust_debuginfo_lines, rust.debuginfo_lines);
 412             set(&mut config.rust_debuginfo_only_std, rust.debuginfo_only_std);
 413             set(&mut config.rust_optimize, rust.optimize);
 414             set(&mut config.rust_optimize_tests, rust.optimize_tests);
 415             set(&mut config.rust_debuginfo_tests, rust.debuginfo_tests);
 416             set(&mut config.codegen_tests, rust.codegen_tests);
 417             set(&mut config.rust_rpath, rust.rpath);
 418             set(&mut config.debug_jemalloc, rust.debug_jemalloc);
 419             set(&mut config.use_jemalloc, rust.use_jemalloc);
 420             set(&mut config.backtrace, rust.backtrace);
 421             set(&mut config.channel, rust.channel.clone());
 422             set(&mut config.ignore_git, rust.ignore_git);
 423             config.rustc_default_linker = rust.default_linker.clone();
 424             config.rustc_default_ar = rust.default_ar.clone();
 425             config.musl_root = rust.musl_root.clone().map(PathBuf::from);
 426
 427             match rust.codegen_units {
 428                 Some(0) => config.rust_codegen_units = num_cpus::get() as u32,
 429                 Some(n) => config.rust_codegen_units = n,
 430                 None => {}
 431             }
 432         }
 433
 434         if let Some(ref t) = toml.target {
 435             for (triple, cfg) in t {
 436                 let mut target = Target::default();
 437
 438                 if let Some(ref s) = cfg.llvm_config {
 439                     target.llvm_config = Some(env::current_dir().unwrap().join(s));
 440                 }
 441                 if let Some(ref s) = cfg.jemalloc {
 442                     target.jemalloc = Some(env::current_dir().unwrap().join(s));
 443                 }
 444                 if let Some(ref s) = cfg.android_ndk {
 445                     target.ndk = Some(env::current_dir().unwrap().join(s));
 446                 }
 447                 target.cxx = cfg.cxx.clone().map(PathBuf::from);
 448                 target.cc = cfg.cc.clone().map(PathBuf::from);
 449                 target.musl_root = cfg.musl_root.clone().map(PathBuf::from);
 450                 target.qemu_rootfs = cfg.qemu_rootfs.clone().map(PathBuf::from);
 451
 452                 config.target_config.insert(INTERNER.intern_string(triple.clone()), target);
 453             }
 454         }
 455
 456         if let Some(ref t) = toml.dist {
 457             config.dist_sign_folder = t.sign_folder.clone().map(PathBuf::from);
 458             config.dist_gpg_password_file = t.gpg_password_file.clone().map(PathBuf::from);
 459             config.dist_upload_addr = t.upload_addr.clone();
 460             set(&mut config.rust_dist_src, t.src_tarball);
 461         }
 462
 463         let cwd = t!(env::current_dir());
 464         let out = cwd.join("build");
 465
 466         let stage0_root = out.join(&config.build).join("stage0/bin");
 467         config.initial_rustc = match build.rustc {
 468             Some(s) => PathBuf::from(s),
 469             None => stage0_root.join(exe("rustc", &config.build)),
 470         };
 471         config.initial_cargo = match build.cargo {
 472             Some(s) => PathBuf::from(s),
 473             None => stage0_root.join(exe("cargo", &config.build)),
 474         };
 475
 476         // compat with `./configure` while we're still using that
 477         if fs::metadata("config.mk").is_ok() {
 478             config.update_with_config_mk();
 479         }
 480
 481         config
 482     }
 483
 484     /// "Temporary" routine to parse `config.mk` into this configuration.
 485     ///
 486     /// While we still have `./configure` this implements the ability to decode
 487     /// that configuration into this. This isn't exactly a full-blown makefile
 488     /// parser, but hey it gets the job done!
 489     fn update_with_config_mk(&mut self) {
 490         let mut config = String::new();
 491         File::open("config.mk").unwrap().read_to_string(&mut config).unwrap();
 492         for line in config.lines() {
 493             let mut parts = line.splitn(2, ":=").map(|s| s.trim());
 494             let key = parts.next().unwrap();
 495             let value = match parts.next() {
 496                 Some(n) if n.starts_with('\"') => &n[1..n.len() - 1],
 497                 Some(n) => n,
 498                 None => continue
 499             };
 500
 501             macro_rules! check {
 502                 ($(($name:expr, $val:expr),)*) => {
 503                     if value == "1" {
 504                         $(
 505                             if key == concat!("CFG_ENABLE_", $name) {
 506                                 $val = true;
 507                                 continue
 508                             }
 509                             if key == concat!("CFG_DISABLE_", $name) {
 510                                 $val = false;
 511                                 continue
 512                             }
 513                         )*
 514                     }
 515                 }
 516             }
 517
 518             check! {
 519                 ("MANAGE_SUBMODULES", self.submodules),
 520                 ("COMPILER_DOCS", self.compiler_docs),
 521                 ("DOCS", self.docs),
 522                 ("LLVM_ASSERTIONS", self.llvm_assertions),
 523                 ("LLVM_RELEASE_DEBUGINFO", self.llvm_release_debuginfo),
 524                 ("OPTIMIZE_LLVM", self.llvm_optimize),
 525                 ("LLVM_VERSION_CHECK", self.llvm_version_check),
 526                 ("LLVM_STATIC_STDCPP", self.llvm_static_stdcpp),
 527                 ("LLVM_LINK_SHARED", self.llvm_link_shared),
 528                 ("OPTIMIZE", self.rust_optimize),
 529                 ("DEBUG_ASSERTIONS", self.rust_debug_assertions),
 530                 ("DEBUGINFO", self.rust_debuginfo),
 531                 ("DEBUGINFO_LINES", self.rust_debuginfo_lines),
 532                 ("DEBUGINFO_ONLY_STD", self.rust_debuginfo_only_std),
 533                 ("JEMALLOC", self.use_jemalloc),
 534                 ("DEBUG_JEMALLOC", self.debug_jemalloc),
 535                 ("RPATH", self.rust_rpath),
 536                 ("OPTIMIZE_TESTS", self.rust_optimize_tests),
 537                 ("DEBUGINFO_TESTS", self.rust_debuginfo_tests),
 538                 ("QUIET_TESTS", self.quiet_tests),
 539                 ("LOCAL_REBUILD", self.local_rebuild),
 540                 ("NINJA", self.ninja),
 541                 ("CODEGEN_TESTS", self.codegen_tests),
 542                 ("LOCKED_DEPS", self.locked_deps),
 543                 ("VENDOR", self.vendor),
 544                 ("FULL_BOOTSTRAP", self.full_bootstrap),
 545                 ("EXTENDED", self.extended),
 546                 ("SANITIZERS", self.sanitizers),
 547                 ("PROFILER", self.profiler),
 548                 ("DIST_SRC", self.rust_dist_src),
 549                 ("CARGO_OPENSSL_STATIC", self.openssl_static),
 550             }
 551
 552             match key {
 553                 "CFG_BUILD" if value.len() > 0 => self.build = INTERNER.intern_str(value),
 554                 "CFG_HOST" if value.len() > 0 => {
 555                     self.hosts.extend(value.split(" ").map(|s| INTERNER.intern_str(s)));
 556
 557                 }
 558                 "CFG_TARGET" if value.len() > 0 => {
 559                     self.targets.extend(value.split(" ").map(|s| INTERNER.intern_str(s)));
 560                 }
 561                 "CFG_EXPERIMENTAL_TARGETS" if value.len() > 0 => {
 562                     self.llvm_experimental_targets = Some(value.to_string());
 563                 }
 564                 "CFG_MUSL_ROOT" if value.len() > 0 => {
 565                     self.musl_root = Some(parse_configure_path(value));
 566                 }
 567                 "CFG_MUSL_ROOT_X86_64" if value.len() > 0 => {
 568                     let target = INTERNER.intern_str("x86_64-unknown-linux-musl");
 569                     let target = self.target_config.entry(target).or_insert(Target::default());
 570                     target.musl_root = Some(parse_configure_path(value));
 571                 }
 572                 "CFG_MUSL_ROOT_I686" if value.len() > 0 => {
 573                     let target = INTERNER.intern_str("i686-unknown-linux-musl");
 574                     let target = self.target_config.entry(target).or_insert(Target::default());
 575                     target.musl_root = Some(parse_configure_path(value));
 576                 }
 577                 "CFG_MUSL_ROOT_ARM" if value.len() > 0 => {
 578                     let target = INTERNER.intern_str("arm-unknown-linux-musleabi");
 579                     let target = self.target_config.entry(target).or_insert(Target::default());
 580                     target.musl_root = Some(parse_configure_path(value));
 581                 }
 582                 "CFG_MUSL_ROOT_ARMHF" if value.len() > 0 => {
 583                     let target = INTERNER.intern_str("arm-unknown-linux-musleabihf");
 584                     let target = self.target_config.entry(target).or_insert(Target::default());
 585                     target.musl_root = Some(parse_configure_path(value));
 586                 }
 587                 "CFG_MUSL_ROOT_ARMV7" if value.len() > 0 => {
 588                     let target = INTERNER.intern_str("armv7-unknown-linux-musleabihf");
 589                     let target = self.target_config.entry(target).or_insert(Target::default());
 590                     target.musl_root = Some(parse_configure_path(value));
 591                 }
 592                 "CFG_DEFAULT_AR" if value.len() > 0 => {
 593                     self.rustc_default_ar = Some(value.to_string());
 594                 }
 595                 "CFG_DEFAULT_LINKER" if value.len() > 0 => {
 596                     self.rustc_default_linker = Some(value.to_string());
 597                 }
 598                 "CFG_GDB" if value.len() > 0 => {
 599                     self.gdb = Some(parse_configure_path(value));
 600                 }
 601                 "CFG_RELEASE_CHANNEL" => {
 602                     self.channel = value.to_string();
 603                 }
 604                 "CFG_PREFIX" => {
 605                     self.prefix = Some(PathBuf::from(value));
 606                 }
 607                 "CFG_SYSCONFDIR" => {
 608                     self.sysconfdir = Some(PathBuf::from(value));
 609                 }
 610                 "CFG_DOCDIR" => {
 611                     self.docdir = Some(PathBuf::from(value));
 612                 }
 613                 "CFG_BINDIR" => {
 614                     self.bindir = Some(PathBuf::from(value));
 615                 }
 616                 "CFG_LIBDIR" => {
 617                     self.libdir = Some(PathBuf::from(value));
 618                 }
 619                 "CFG_LIBDIR_RELATIVE" => {
 620                     self.libdir_relative = Some(PathBuf::from(value));
 621                 }
 622                 "CFG_MANDIR" => {
 623                     self.mandir = Some(PathBuf::from(value));
 624                 }
 625                 "CFG_LLVM_ROOT" if value.len() > 0 => {
 626                     let target = self.target_config.entry(self.build.clone())
 627                                      .or_insert(Target::default());
 628                     let root = parse_configure_path(value);
 629                     target.llvm_config = Some(push_exe_path(root, &["bin", "llvm-config"]));
 630                 }
 631                 "CFG_JEMALLOC_ROOT" if value.len() > 0 => {
 632                     let target = self.target_config.entry(self.build.clone())
 633                                      .or_insert(Target::default());
 634                     target.jemalloc = Some(parse_configure_path(value).join("libjemalloc_pic.a"));
 635                 }
 636                 "CFG_ARM_LINUX_ANDROIDEABI_NDK" if value.len() > 0 => {
 637                     let target = INTERNER.intern_str("arm-linux-androideabi");
 638                     let target = self.target_config.entry(target).or_insert(Target::default());
 639                     target.ndk = Some(parse_configure_path(value));
 640                 }
 641                 "CFG_ARMV7_LINUX_ANDROIDEABI_NDK" if value.len() > 0 => {
 642                     let target = INTERNER.intern_str("armv7-linux-androideabi");
 643                     let target = self.target_config.entry(target).or_insert(Target::default());
 644                     target.ndk = Some(parse_configure_path(value));
 645                 }
 646                 "CFG_I686_LINUX_ANDROID_NDK" if value.len() > 0 => {
 647                     let target = INTERNER.intern_str("i686-linux-android");
 648                     let target = self.target_config.entry(target).or_insert(Target::default());
 649                     target.ndk = Some(parse_configure_path(value));
 650                 }
 651                 "CFG_AARCH64_LINUX_ANDROID_NDK" if value.len() > 0 => {
 652                     let target = INTERNER.intern_str("aarch64-linux-android");
 653                     let target = self.target_config.entry(target).or_insert(Target::default());
 654                     target.ndk = Some(parse_configure_path(value));
 655                 }
 656                 "CFG_X86_64_LINUX_ANDROID_NDK" if value.len() > 0 => {
 657                     let target = INTERNER.intern_str("x86_64-linux-android");
 658                     let target = self.target_config.entry(target).or_insert(Target::default());
 659                     target.ndk = Some(parse_configure_path(value));
 660                 }
 661                 "CFG_LOCAL_RUST_ROOT" if value.len() > 0 => {
 662                     let path = parse_configure_path(value);
 663                     self.initial_rustc = push_exe_path(path.clone(), &["bin", "rustc"]);
 664                     self.initial_cargo = push_exe_path(path, &["bin", "cargo"]);
 665                 }
 666                 "CFG_PYTHON" if value.len() > 0 => {
 667                     let path = parse_configure_path(value);
 668                     self.python = Some(path);
 669                 }
 670                 "CFG_ENABLE_CCACHE" if value == "1" => {
 671                     self.ccache = Some(exe("ccache", &self.build));
 672                 }
 673                 "CFG_ENABLE_SCCACHE" if value == "1" => {
 674                     self.ccache = Some(exe("sccache", &self.build));
 675                 }
 676                 "CFG_CONFIGURE_ARGS" if value.len() > 0 => {
 677                     self.configure_args = value.split_whitespace()
 678                                                .map(|s| s.to_string())
 679                                                .collect();
 680                 }
 681                 "CFG_QEMU_ARMHF_ROOTFS" if value.len() > 0 => {
 682                     let target = INTERNER.intern_str("arm-unknown-linux-gnueabihf");
 683                     let target = self.target_config.entry(target).or_insert(Target::default());
 684                     target.qemu_rootfs = Some(parse_configure_path(value));
 685                 }
 686                 "CFG_QEMU_AARCH64_ROOTFS" if value.len() > 0 => {
 687                     let target = INTERNER.intern_str("aarch64-unknown-linux-gnu");
 688                     let target = self.target_config.entry(target).or_insert(Target::default());
 689                     target.qemu_rootfs = Some(parse_configure_path(value));
 690                 }
 691                 _ => {}
 692             }
 693         }
 694     }
 695
 696     pub fn verbose(&self) -> bool {
 697         self.verbose > 0
 698     }
 699
 700     pub fn very_verbose(&self) -> bool {
 701         self.verbose > 1
 702     }
 703 }
 704
 705 #[cfg(not(windows))]
 706 fn parse_configure_path(path: &str) -> PathBuf {
 707     path.into()
 708 }
 709
 710 #[cfg(windows)]
 711 fn parse_configure_path(path: &str) -> PathBuf {
 712     // on windows, configure produces unix style paths e.g. /c/some/path but we
 713     // only want real windows paths
 714
 715     use std::process::Command;
 716     use build_helper;
 717
 718     // '/' is invalid in windows paths, so we can detect unix paths by the presence of it
 719     if !path.contains('/') {
 720         return path.into();
 721     }
 722
 723     let win_path = build_helper::output(Command::new("cygpath").arg("-w").arg(path));
 724     let win_path = win_path.trim();
 725
 726     win_path.into()
 727 }
 728
 729 fn set<T>(field: &mut T, val: Option<T>) {
 730     if let Some(v) = val {
 731         *field = v;
 732     }
 733 }