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Diffstat (limited to 'third_party/rust/gcc/src/lib.rs')
| -rw-r--r-- | third_party/rust/gcc/src/lib.rs | 898 |
1 files changed, 0 insertions, 898 deletions
diff --git a/third_party/rust/gcc/src/lib.rs b/third_party/rust/gcc/src/lib.rs deleted file mode 100644 index ea2cc9b86..000000000 --- a/third_party/rust/gcc/src/lib.rs +++ /dev/null @@ -1,898 +0,0 @@ -//! A library for build scripts to compile custom C code -//! -//! This library is intended to be used as a `build-dependencies` entry in -//! `Cargo.toml`: -//! -//! ```toml -//! [build-dependencies] -//! gcc = "0.3" -//! ``` -//! -//! The purpose of this crate is to provide the utility functions necessary to -//! compile C code into a static archive which is then linked into a Rust crate. -//! The top-level `compile_library` function serves as a convenience and more -//! advanced configuration is available through the `Config` builder. -//! -//! This crate will automatically detect situations such as cross compilation or -//! other environment variables set by Cargo and will build code appropriately. -//! -//! # Examples -//! -//! Use the default configuration: -//! -//! ```no_run -//! extern crate gcc; -//! -//! fn main() { -//! gcc::compile_library("libfoo.a", &["src/foo.c"]); -//! } -//! ``` -//! -//! Use more advanced configuration: -//! -//! ```no_run -//! extern crate gcc; -//! -//! fn main() { -//! gcc::Config::new() -//! .file("src/foo.c") -//! .define("FOO", Some("bar")) -//! .include("src") -//! .compile("libfoo.a"); -//! } -//! ``` - -#![doc(html_root_url = "http://alexcrichton.com/gcc-rs")] -#![cfg_attr(test, deny(warnings))] -#![deny(missing_docs)] - -#[cfg(feature = "parallel")] -extern crate rayon; - -use std::env; -use std::ffi::{OsString, OsStr}; -use std::fs; -use std::io; -use std::path::{PathBuf, Path}; -use std::process::{Command, Stdio}; -use std::io::{BufReader, BufRead, Write}; - -#[cfg(windows)] -mod registry; -pub mod windows_registry; - -/// Extra configuration to pass to gcc. -pub struct Config { - include_directories: Vec<PathBuf>, - definitions: Vec<(String, Option<String>)>, - objects: Vec<PathBuf>, - flags: Vec<String>, - files: Vec<PathBuf>, - cpp: bool, - cpp_link_stdlib: Option<Option<String>>, - cpp_set_stdlib: Option<String>, - target: Option<String>, - host: Option<String>, - out_dir: Option<PathBuf>, - opt_level: Option<u32>, - debug: Option<bool>, - env: Vec<(OsString, OsString)>, - compiler: Option<PathBuf>, - archiver: Option<PathBuf>, - cargo_metadata: bool, - pic: Option<bool>, -} - -/// Configuration used to represent an invocation of a C compiler. -/// -/// This can be used to figure out what compiler is in use, what the arguments -/// to it are, and what the environment variables look like for the compiler. -/// This can be used to further configure other build systems (e.g. forward -/// along CC and/or CFLAGS) or the `to_command` method can be used to run the -/// compiler itself. -pub struct Tool { - path: PathBuf, - args: Vec<OsString>, - env: Vec<(OsString, OsString)>, -} - -/// Compile a library from the given set of input C files. -/// -/// This will simply compile all files into object files and then assemble them -/// into the output. This will read the standard environment variables to detect -/// cross compilations and such. -/// -/// This function will also print all metadata on standard output for Cargo. -/// -/// # Example -/// -/// ```no_run -/// gcc::compile_library("libfoo.a", &["foo.c", "bar.c"]); -/// ``` -pub fn compile_library(output: &str, files: &[&str]) { - let mut c = Config::new(); - for f in files.iter() { - c.file(*f); - } - c.compile(output) -} - -impl Config { - /// Construct a new instance of a blank set of configuration. - /// - /// This builder is finished with the `compile` function. - pub fn new() -> Config { - Config { - include_directories: Vec::new(), - definitions: Vec::new(), - objects: Vec::new(), - flags: Vec::new(), - files: Vec::new(), - cpp: false, - cpp_link_stdlib: None, - cpp_set_stdlib: None, - target: None, - host: None, - out_dir: None, - opt_level: None, - debug: None, - env: Vec::new(), - compiler: None, - archiver: None, - cargo_metadata: true, - pic: None, - } - } - - /// Add a directory to the `-I` or include path for headers - pub fn include<P: AsRef<Path>>(&mut self, dir: P) -> &mut Config { - self.include_directories.push(dir.as_ref().to_path_buf()); - self - } - - /// Specify a `-D` variable with an optional value. - pub fn define(&mut self, var: &str, val: Option<&str>) -> &mut Config { - self.definitions.push((var.to_string(), val.map(|s| s.to_string()))); - self - } - - /// Add an arbitrary object file to link in - pub fn object<P: AsRef<Path>>(&mut self, obj: P) -> &mut Config { - self.objects.push(obj.as_ref().to_path_buf()); - self - } - - /// Add an arbitrary flag to the invocation of the compiler - pub fn flag(&mut self, flag: &str) -> &mut Config { - self.flags.push(flag.to_string()); - self - } - - /// Add a file which will be compiled - pub fn file<P: AsRef<Path>>(&mut self, p: P) -> &mut Config { - self.files.push(p.as_ref().to_path_buf()); - self - } - - /// Set C++ support. - /// - /// The other `cpp_*` options will only become active if this is set to - /// `true`. - pub fn cpp(&mut self, cpp: bool) -> &mut Config { - self.cpp = cpp; - self - } - - /// Set the standard library to link against when compiling with C++ - /// support. - /// - /// The default value of this property depends on the current target: On - /// OS X `Some("c++")` is used, when compiling for a Visual Studio based - /// target `None` is used and for other targets `Some("stdc++")` is used. - /// - /// A value of `None` indicates that no automatic linking should happen, - /// otherwise cargo will link against the specified library. - /// - /// The given library name must not contain the `lib` prefix. - pub fn cpp_link_stdlib(&mut self, cpp_link_stdlib: Option<&str>) - -> &mut Config { - self.cpp_link_stdlib = Some(cpp_link_stdlib.map(|s| s.into())); - self - } - - /// Force the C++ compiler to use the specified standard library. - /// - /// Setting this option will automatically set `cpp_link_stdlib` to the same - /// value. - /// - /// The default value of this option is always `None`. - /// - /// This option has no effect when compiling for a Visual Studio based - /// target. - /// - /// This option sets the `-stdlib` flag, which is only supported by some - /// compilers (clang, icc) but not by others (gcc). The library will not - /// detect which compiler is used, as such it is the responsibility of the - /// caller to ensure that this option is only used in conjuction with a - /// compiler which supports the `-stdlib` flag. - /// - /// A value of `None` indicates that no specific C++ standard library should - /// be used, otherwise `-stdlib` is added to the compile invocation. - /// - /// The given library name must not contain the `lib` prefix. - pub fn cpp_set_stdlib(&mut self, cpp_set_stdlib: Option<&str>) - -> &mut Config { - self.cpp_set_stdlib = cpp_set_stdlib.map(|s| s.into()); - self.cpp_link_stdlib(cpp_set_stdlib); - self - } - - /// Configures the target this configuration will be compiling for. - /// - /// This option is automatically scraped from the `TARGET` environment - /// variable by build scripts, so it's not required to call this function. - pub fn target(&mut self, target: &str) -> &mut Config { - self.target = Some(target.to_string()); - self - } - - /// Configures the host assumed by this configuration. - /// - /// This option is automatically scraped from the `HOST` environment - /// variable by build scripts, so it's not required to call this function. - pub fn host(&mut self, host: &str) -> &mut Config { - self.host = Some(host.to_string()); - self - } - - /// Configures the optimization level of the generated object files. - /// - /// This option is automatically scraped from the `OPT_LEVEL` environment - /// variable by build scripts, so it's not required to call this function. - pub fn opt_level(&mut self, opt_level: u32) -> &mut Config { - self.opt_level = Some(opt_level); - self - } - - /// Configures whether the compiler will emit debug information when - /// generating object files. - /// - /// This option is automatically scraped from the `PROFILE` environment - /// variable by build scripts (only enabled when the profile is "debug"), so - /// it's not required to call this function. - pub fn debug(&mut self, debug: bool) -> &mut Config { - self.debug = Some(debug); - self - } - - /// Configures the output directory where all object files and static - /// libraries will be located. - /// - /// This option is automatically scraped from the `OUT_DIR` environment - /// variable by build scripts, so it's not required to call this function. - pub fn out_dir<P: AsRef<Path>>(&mut self, out_dir: P) -> &mut Config { - self.out_dir = Some(out_dir.as_ref().to_owned()); - self - } - - /// Configures the compiler to be used to produce output. - /// - /// This option is automatically determined from the target platform or a - /// number of environment variables, so it's not required to call this - /// function. - pub fn compiler<P: AsRef<Path>>(&mut self, compiler: P) -> &mut Config { - self.compiler = Some(compiler.as_ref().to_owned()); - self - } - - /// Configures the tool used to assemble archives. - /// - /// This option is automatically determined from the target platform or a - /// number of environment variables, so it's not required to call this - /// function. - pub fn archiver<P: AsRef<Path>>(&mut self, archiver: P) -> &mut Config { - self.archiver = Some(archiver.as_ref().to_owned()); - self - } - /// Define whether metadata should be emitted for cargo allowing it to - /// automatically link the binary. Defaults to `true`. - pub fn cargo_metadata(&mut self, cargo_metadata: bool) -> &mut Config { - self.cargo_metadata = cargo_metadata; - self - } - - /// Configures whether the compiler will emit position independent code. - /// - /// This option defaults to `false` for `i686` and `windows-gnu` targets and to `true` for all - /// other targets. - pub fn pic(&mut self, pic: bool) -> &mut Config { - self.pic = Some(pic); - self - } - - - #[doc(hidden)] - pub fn __set_env<A, B>(&mut self, a: A, b: B) -> &mut Config - where A: AsRef<OsStr>, B: AsRef<OsStr> - { - self.env.push((a.as_ref().to_owned(), b.as_ref().to_owned())); - self - } - - /// Run the compiler, generating the file `output` - /// - /// The name `output` must begin with `lib` and end with `.a` - pub fn compile(&self, output: &str) { - assert!(output.starts_with("lib")); - assert!(output.ends_with(".a")); - let lib_name = &output[3..output.len() - 2]; - let dst = self.get_out_dir(); - - let mut objects = Vec::new(); - let mut src_dst = Vec::new(); - for file in self.files.iter() { - let obj = dst.join(file).with_extension("o"); - let obj = if !obj.starts_with(&dst) { - dst.join(obj.file_name().unwrap()) - } else { - obj - }; - fs::create_dir_all(&obj.parent().unwrap()).unwrap(); - src_dst.push((file.to_path_buf(), obj.clone())); - objects.push(obj); - } - self.compile_objects(&src_dst); - self.assemble(lib_name, &dst.join(output), &objects); - - self.print(&format!("cargo:rustc-link-lib=static={}", - &output[3..output.len() - 2])); - self.print(&format!("cargo:rustc-link-search=native={}", dst.display())); - - // Add specific C++ libraries, if enabled. - if self.cpp { - if let Some(stdlib) = self.get_cpp_link_stdlib() { - self.print(&format!("cargo:rustc-link-lib={}", stdlib)); - } - } - } - - #[cfg(feature = "parallel")] - fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) { - use self::rayon::prelude::*; - - let mut cfg = rayon::Configuration::new(); - if let Ok(amt) = env::var("NUM_JOBS") { - if let Ok(amt) = amt.parse() { - cfg = cfg.set_num_threads(amt); - } - } - drop(rayon::initialize(cfg)); - - objs.par_iter().weight_max().for_each(|&(ref src, ref dst)| { - self.compile_object(src, dst) - }) - } - - #[cfg(not(feature = "parallel"))] - fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) { - for &(ref src, ref dst) in objs { - self.compile_object(src, dst); - } - } - - fn compile_object(&self, file: &Path, dst: &Path) { - let is_asm = file.extension().and_then(|s| s.to_str()) == Some("asm"); - let msvc = self.get_target().contains("msvc"); - let (mut cmd, name) = if msvc && is_asm { - self.msvc_macro_assembler() - } else { - let compiler = self.get_compiler(); - let mut cmd = compiler.to_command(); - for &(ref a, ref b) in self.env.iter() { - cmd.env(a, b); - } - (cmd, compiler.path.file_name().unwrap() - .to_string_lossy().into_owned()) - }; - if msvc && is_asm { - cmd.arg("/Fo").arg(dst); - } else if msvc { - let mut s = OsString::from("/Fo"); - s.push(&dst); - cmd.arg(s); - } else { - cmd.arg("-o").arg(&dst); - } - cmd.arg(if msvc {"/c"} else {"-c"}); - cmd.arg(file); - - run(&mut cmd, &name); - } - - /// Get the compiler that's in use for this configuration. - /// - /// This function will return a `Tool` which represents the culmination - /// of this configuration at a snapshot in time. The returned compiler can - /// be inspected (e.g. the path, arguments, environment) to forward along to - /// other tools, or the `to_command` method can be used to invoke the - /// compiler itself. - /// - /// This method will take into account all configuration such as debug - /// information, optimization level, include directories, defines, etc. - /// Additionally, the compiler binary in use follows the standard - /// conventions for this path, e.g. looking at the explicitly set compiler, - /// environment variables (a number of which are inspected here), and then - /// falling back to the default configuration. - pub fn get_compiler(&self) -> Tool { - let opt_level = self.get_opt_level(); - let debug = self.get_debug(); - let target = self.get_target(); - let msvc = target.contains("msvc"); - self.print(&format!("debug={} opt-level={}", debug, opt_level)); - - let mut cmd = self.get_base_compiler(); - let nvcc = cmd.path.to_str() - .map(|path| path.contains("nvcc")) - .unwrap_or(false); - - if msvc { - cmd.args.push("/nologo".into()); - cmd.args.push("/MD".into()); // link against msvcrt.dll for now - if opt_level != 0 { - cmd.args.push("/O2".into()); - } - if target.contains("i686") { - cmd.args.push("/SAFESEH".into()); - } else if target.contains("i586") { - cmd.args.push("/SAFESEH".into()); - cmd.args.push("/ARCH:IA32".into()); - } - } else if nvcc { - cmd.args.push(format!("-O{}", opt_level).into()); - } else { - cmd.args.push(format!("-O{}", opt_level).into()); - cmd.args.push("-ffunction-sections".into()); - cmd.args.push("-fdata-sections".into()); - } - for arg in self.envflags(if self.cpp {"CXXFLAGS"} else {"CFLAGS"}) { - cmd.args.push(arg.into()); - } - - if debug { - cmd.args.push(if msvc {"/Z7"} else {"-g"}.into()); - } - - if target.contains("-ios") { - self.ios_flags(&mut cmd); - } else if !msvc { - if target.contains("i686") || target.contains("i586") { - cmd.args.push("-m32".into()); - } else if target.contains("x86_64") || target.contains("powerpc64") { - cmd.args.push("-m64".into()); - } - - if !nvcc && self.pic.unwrap_or(!target.contains("i686") && !target.contains("windows-gnu")) { - cmd.args.push("-fPIC".into()); - } else if nvcc && self.pic.unwrap_or(false) { - cmd.args.push("-Xcompiler".into()); - cmd.args.push("\'-fPIC\'".into()); - } - if target.contains("musl") { - cmd.args.push("-static".into()); - } - - if target.starts_with("armv7-unknown-linux-") { - cmd.args.push("-march=armv7-a".into()); - } - if target.starts_with("arm-unknown-linux-") { - cmd.args.push("-march=armv6".into()); - cmd.args.push("-marm".into()); - } - if target.starts_with("i586-unknown-linux-") { - cmd.args.push("-march=pentium".into()); - } - if target.starts_with("i686-unknown-linux-") { - cmd.args.push("-march=i686".into()); - } - } - - if self.cpp && !msvc { - if let Some(ref stdlib) = self.cpp_set_stdlib { - cmd.args.push(format!("-stdlib=lib{}", stdlib).into()); - } - } - - for directory in self.include_directories.iter() { - cmd.args.push(if msvc {"/I"} else {"-I"}.into()); - cmd.args.push(directory.into()); - } - - for flag in self.flags.iter() { - cmd.args.push(flag.into()); - } - - for &(ref key, ref value) in self.definitions.iter() { - let lead = if msvc {"/"} else {"-"}; - if let &Some(ref value) = value { - cmd.args.push(format!("{}D{}={}", lead, key, value).into()); - } else { - cmd.args.push(format!("{}D{}", lead, key).into()); - } - } - cmd - } - - fn msvc_macro_assembler(&self) -> (Command, String) { - let target = self.get_target(); - let tool = if target.contains("x86_64") {"ml64.exe"} else {"ml.exe"}; - let mut cmd = windows_registry::find(&target, tool).unwrap_or_else(|| { - self.cmd(tool) - }); - for directory in self.include_directories.iter() { - cmd.arg("/I").arg(directory); - } - for &(ref key, ref value) in self.definitions.iter() { - if let &Some(ref value) = value { - cmd.arg(&format!("/D{}={}", key, value)); - } else { - cmd.arg(&format!("/D{}", key)); - } - } - - if target.contains("i686") || target.contains("i586") { - cmd.arg("/safeseh"); - } - for flag in self.flags.iter() { - cmd.arg(flag); - } - - (cmd, tool.to_string()) - } - - fn assemble(&self, lib_name: &str, dst: &Path, objects: &[PathBuf]) { - // Delete the destination if it exists as the `ar` tool at least on Unix - // appends to it, which we don't want. - let _ = fs::remove_file(&dst); - - let target = self.get_target(); - if target.contains("msvc") { - let mut cmd = match self.archiver { - Some(ref s) => self.cmd(s), - None => windows_registry::find(&target, "lib.exe") - .unwrap_or(self.cmd("lib.exe")), - }; - let mut out = OsString::from("/OUT:"); - out.push(dst); - run(cmd.arg(out).arg("/nologo") - .args(objects) - .args(&self.objects), "lib.exe"); - - // The Rust compiler will look for libfoo.a and foo.lib, but the - // MSVC linker will also be passed foo.lib, so be sure that both - // exist for now. - let lib_dst = dst.with_file_name(format!("{}.lib", lib_name)); - let _ = fs::remove_file(&lib_dst); - fs::hard_link(&dst, &lib_dst).or_else(|_| { - //if hard-link fails, just copy (ignoring the number of bytes written) - fs::copy(&dst, &lib_dst).map(|_| ()) - }).ok().expect("Copying from {:?} to {:?} failed.");; - } else { - let ar = self.get_ar(); - let cmd = ar.file_name().unwrap().to_string_lossy(); - run(self.cmd(&ar).arg("crus") - .arg(dst) - .args(objects) - .args(&self.objects), &cmd); - } - } - - fn ios_flags(&self, cmd: &mut Tool) { - enum ArchSpec { - Device(&'static str), - Simulator(&'static str), - } - - let target = self.get_target(); - let arch = target.split('-').nth(0).unwrap(); - let arch = match arch { - "arm" | "armv7" | "thumbv7" => ArchSpec::Device("armv7"), - "armv7s" | "thumbv7s" => ArchSpec::Device("armv7s"), - "arm64" | "aarch64" => ArchSpec::Device("arm64"), - "i386" | "i686" => ArchSpec::Simulator("-m32"), - "x86_64" => ArchSpec::Simulator("-m64"), - _ => fail("Unknown arch for iOS target") - }; - - let sdk = match arch { - ArchSpec::Device(arch) => { - cmd.args.push("-arch".into()); - cmd.args.push(arch.into()); - cmd.args.push("-miphoneos-version-min=7.0".into()); - "iphoneos" - }, - ArchSpec::Simulator(arch) => { - cmd.args.push(arch.into()); - cmd.args.push("-mios-simulator-version-min=7.0".into()); - "iphonesimulator" - } - }; - - self.print(&format!("Detecting iOS SDK path for {}", sdk)); - let sdk_path = self.cmd("xcrun") - .arg("--show-sdk-path") - .arg("--sdk") - .arg(sdk) - .stderr(Stdio::inherit()) - .output() - .unwrap() - .stdout; - - let sdk_path = String::from_utf8(sdk_path).unwrap(); - - cmd.args.push("-isysroot".into()); - cmd.args.push(sdk_path.trim().into()); - } - - fn cmd<P: AsRef<OsStr>>(&self, prog: P) -> Command { - let mut cmd = Command::new(prog); - for &(ref a, ref b) in self.env.iter() { - cmd.env(a, b); - } - return cmd - } - - fn get_base_compiler(&self) -> Tool { - if let Some(ref c) = self.compiler { - return Tool::new(c.clone()) - } - let host = self.get_host(); - let target = self.get_target(); - let (env, msvc, gnu, default) = if self.cpp { - ("CXX", "cl.exe", "g++", "c++") - } else { - ("CC", "cl.exe", "gcc", "cc") - }; - self.env_tool(env).map(|(tool, args)| { - let mut t = Tool::new(PathBuf::from(tool)); - for arg in args { - t.args.push(arg.into()); - } - return t - }).or_else(|| { - windows_registry::find_tool(&target, "cl.exe") - }).unwrap_or_else(|| { - let compiler = if host.contains("windows") && - target.contains("windows") { - if target.contains("msvc") { - msvc.to_string() - } else { - format!("{}.exe", gnu) - } - } else if target.contains("android") { - format!("{}-{}", target, gnu) - } else if self.get_host() != target { - let prefix = match &target[..] { - "aarch64-unknown-linux-gnu" => Some("aarch64-linux-gnu"), - "arm-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"), - "arm-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"), - "armv7-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"), - "arm-unknown-linux-musleabi" => Some("arm-linux-musleabi"), - "arm-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"), - "armv7-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"), - "powerpc-unknown-linux-gnu" => Some("powerpc-linux-gnu"), - "powerpc64-unknown-linux-gnu" => Some("powerpc-linux-gnu"), - "powerpc64le-unknown-linux-gnu" => Some("powerpc64le-linux-gnu"), - "mips-unknown-linux-gnu" => Some("mips-linux-gnu"), - "mipsel-unknown-linux-gnu" => Some("mipsel-linux-gnu"), - "i686-pc-windows-gnu" => Some("i686-w64-mingw32"), - "x86_64-pc-windows-gnu" => Some("x86_64-w64-mingw32"), - "x86_64-unknown-linux-musl" => Some("musl"), - "x86_64-rumprun-netbsd" => Some("x86_64-rumprun-netbsd"), - _ => None, - }; - match prefix { - Some(prefix) => format!("{}-{}", prefix, gnu), - None => default.to_string(), - } - } else { - default.to_string() - }; - Tool::new(PathBuf::from(compiler)) - }) - } - - fn get_var(&self, var_base: &str) -> Result<String, String> { - let target = self.get_target(); - let host = self.get_host(); - let kind = if host == target {"HOST"} else {"TARGET"}; - let target_u = target.replace("-", "_"); - let res = self.getenv(&format!("{}_{}", var_base, target)) - .or_else(|| self.getenv(&format!("{}_{}", var_base, target_u))) - .or_else(|| self.getenv(&format!("{}_{}", kind, var_base))) - .or_else(|| self.getenv(var_base)); - - match res { - Some(res) => Ok(res), - None => Err("could not get environment variable".to_string()), - } - } - - fn envflags(&self, name: &str) -> Vec<String> { - self.get_var(name).unwrap_or(String::new()) - .split(|c: char| c.is_whitespace()).filter(|s| !s.is_empty()) - .map(|s| s.to_string()) - .collect() - } - - fn env_tool(&self, name: &str) -> Option<(String, Vec<String>)> { - self.get_var(name).ok().map(|tool| { - let whitelist = ["ccache", "distcc"]; - for t in whitelist.iter() { - if tool.starts_with(t) && tool[t.len()..].starts_with(" ") { - return (t.to_string(), - vec![tool[t.len()..].trim_left().to_string()]) - } - } - (tool, Vec::new()) - }) - } - - /// Returns the default C++ standard library for the current target: `libc++` - /// for OS X and `libstdc++` for anything else. - fn get_cpp_link_stdlib(&self) -> Option<String> { - self.cpp_link_stdlib.clone().unwrap_or_else(|| { - let target = self.get_target(); - if target.contains("msvc") { - None - } else if target.contains("darwin") { - Some("c++".to_string()) - } else { - Some("stdc++".to_string()) - } - }) - } - - fn get_ar(&self) -> PathBuf { - self.archiver.clone().or_else(|| { - self.get_var("AR").map(PathBuf::from).ok() - }).unwrap_or_else(|| { - if self.get_target().contains("android") { - PathBuf::from(format!("{}-ar", self.get_target())) - } else { - PathBuf::from("ar") - } - }) - } - - fn get_target(&self) -> String { - self.target.clone().unwrap_or_else(|| self.getenv_unwrap("TARGET")) - } - - fn get_host(&self) -> String { - self.host.clone().unwrap_or_else(|| self.getenv_unwrap("HOST")) - } - - fn get_opt_level(&self) -> u32 { - self.opt_level.unwrap_or_else(|| { - self.getenv_unwrap("OPT_LEVEL").parse().unwrap() - }) - } - - fn get_debug(&self) -> bool { - self.debug.unwrap_or_else(|| self.getenv_unwrap("PROFILE") == "debug") - } - - fn get_out_dir(&self) -> PathBuf { - self.out_dir.clone().unwrap_or_else(|| { - env::var_os("OUT_DIR").map(PathBuf::from).unwrap() - }) - } - - fn getenv(&self, v: &str) -> Option<String> { - let r = env::var(v).ok(); - self.print(&format!("{} = {:?}", v, r)); - r - } - - fn getenv_unwrap(&self, v: &str) -> String { - match self.getenv(v) { - Some(s) => s, - None => fail(&format!("environment variable `{}` not defined", v)), - } - } - - fn print(&self, s: &str) { - if self.cargo_metadata { - println!("{}", s); - } - } -} - -impl Tool { - fn new(path: PathBuf) -> Tool { - Tool { - path: path, - args: Vec::new(), - env: Vec::new(), - } - } - - /// Converts this compiler into a `Command` that's ready to be run. - /// - /// This is useful for when the compiler needs to be executed and the - /// command returned will already have the initial arguments and environment - /// variables configured. - pub fn to_command(&self) -> Command { - let mut cmd = Command::new(&self.path); - cmd.args(&self.args); - for &(ref k, ref v) in self.env.iter() { - cmd.env(k, v); - } - return cmd - } - - /// Returns the path for this compiler. - /// - /// Note that this may not be a path to a file on the filesystem, e.g. "cc", - /// but rather something which will be resolved when a process is spawned. - pub fn path(&self) -> &Path { - &self.path - } - - /// Returns the default set of arguments to the compiler needed to produce - /// executables for the target this compiler generates. - pub fn args(&self) -> &[OsString] { - &self.args - } - - /// Returns the set of environment variables needed for this compiler to - /// operate. - /// - /// This is typically only used for MSVC compilers currently. - pub fn env(&self) -> &[(OsString, OsString)] { - &self.env - } -} - -fn run(cmd: &mut Command, program: &str) { - println!("running: {:?}", cmd); - // Capture the standard error coming from these programs, and write it out - // with cargo:warning= prefixes. Note that this is a bit wonky to avoid - // requiring the output to be UTF-8, we instead just ship bytes from one - // location to another. - let spawn_result = match cmd.stderr(Stdio::piped()).spawn() { - Ok(mut child) => { - let stderr = BufReader::new(child.stderr.take().unwrap()); - for line in stderr.split(b'\n').filter_map(|l| l.ok()) { - print!("cargo:warning="); - std::io::stdout().write_all(&line).unwrap(); - println!(""); - } - child.wait() - } - Err(e) => Err(e), - }; - let status = match spawn_result { - Ok(status) => status, - Err(ref e) if e.kind() == io::ErrorKind::NotFound => { - let extra = if cfg!(windows) { - " (see https://github.com/alexcrichton/gcc-rs#compile-time-requirements \ - for help)" - } else { - "" - }; - fail(&format!("failed to execute command: {}\nIs `{}` \ - not installed?{}", e, program, extra)); - } - Err(e) => fail(&format!("failed to execute command: {}", e)), - }; - println!("{:?}", status); - if !status.success() { - fail(&format!("command did not execute successfully, got: {}", status)); - } -} - -fn fail(s: &str) -> ! { - println!("\n\n{}\n\n", s); - panic!() -} |