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