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