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Diffstat (limited to 'gcc/src/lib.rs')
| -rw-r--r-- | gcc/src/lib.rs | 1684 |
1 files changed, 0 insertions, 1684 deletions
diff --git a/gcc/src/lib.rs b/gcc/src/lib.rs deleted file mode 100644 index 4c5e724..0000000 --- a/gcc/src/lib.rs +++ /dev/null @@ -1,1684 +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. -//! Configuration is available through the `Build` struct. -//! -//! This crate will automatically detect situations such as cross compilation or -//! other environment variables set by Cargo and will build code appropriately. -//! -//! The crate is not limited to C code, it can accept any source code that can -//! be passed to a C or C++ compiler. As such, assembly files with extensions -//! `.s` (gcc/clang) and `.asm` (MSVC) can also be compiled. -//! -//! [`Build`]: struct.Build.html -//! -//! # Examples -//! -//! Use the `Build` struct to compile `src/foo.c`: -//! -//! ```no_run -//! extern crate gcc; -//! -//! fn main() { -//! gcc::Build::new() -//! .file("src/foo.c") -//! .define("FOO", Some("bar")) -//! .include("src") -//! .compile("foo"); -//! } -//! ``` - -#![doc(html_root_url = "https://docs.rs/gcc/0.3")] -#![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::path::{PathBuf, Path}; -use std::process::{Command, Stdio, Child}; -use std::io::{self, BufReader, BufRead, Read, Write}; -use std::thread::{self, JoinHandle}; - -#[doc(hidden)] -#[deprecated(since="0.3.51", note="gcc::Config has been renamed to gcc::Build")] -pub type Config = Build; - -#[cfg(feature = "parallel")] -use std::sync::Mutex; - -// These modules are all glue to support reading the MSVC version from -// the registry and from COM interfaces -#[cfg(windows)] -mod registry; -#[cfg(windows)] -#[macro_use] -mod winapi; -#[cfg(windows)] -mod com; -#[cfg(windows)] -mod setup_config; - -pub mod windows_registry; - -/// Extra configuration to pass to gcc. -#[derive(Clone, Debug)] -pub struct Build { - include_directories: Vec<PathBuf>, - definitions: Vec<(String, Option<String>)>, - objects: Vec<PathBuf>, - flags: Vec<String>, - flags_supported: 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<String>, - debug: Option<bool>, - env: Vec<(OsString, OsString)>, - compiler: Option<PathBuf>, - archiver: Option<PathBuf>, - cargo_metadata: bool, - pic: Option<bool>, - static_crt: Option<bool>, - shared_flag: Option<bool>, - static_flag: Option<bool>, - warnings_into_errors: bool, - warnings: bool, -} - -/// Represents the types of errors that may occur while using gcc-rs. -#[derive(Clone, Debug)] -enum ErrorKind { - /// Error occurred while performing I/O. - IOError, - /// Invalid architecture supplied. - ArchitectureInvalid, - /// Environment variable not found, with the var in question as extra info. - EnvVarNotFound, - /// Error occurred while using external tools (ie: invocation of compiler). - ToolExecError, - /// Error occurred due to missing external tools. - ToolNotFound, -} - -/// Represents an internal error that occurred, with an explaination. -#[derive(Clone, Debug)] -pub struct Error { - /// Describes the kind of error that occurred. - kind: ErrorKind, - /// More explaination of error that occurred. - message: String, -} - -impl Error { - fn new(kind: ErrorKind, message: &str) -> Error { - Error { kind: kind, message: message.to_owned() } - } -} - -impl From<io::Error> for Error { - fn from(e: io::Error) -> Error { - Error::new(ErrorKind::IOError, &format!("{}", e)) - } -} - -/// 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. -#[derive(Clone, Debug)] -pub struct Tool { - path: PathBuf, - args: Vec<OsString>, - env: Vec<(OsString, OsString)>, - family: ToolFamily -} - -/// Represents the family of tools this tool belongs to. -/// -/// Each family of tools differs in how and what arguments they accept. -/// -/// Detection of a family is done on best-effort basis and may not accurately reflect the tool. -#[derive(Copy, Clone, Debug, PartialEq)] -enum ToolFamily { - /// Tool is GNU Compiler Collection-like. - Gnu, - /// Tool is Clang-like. It differs from the GCC in a sense that it accepts superset of flags - /// and its cross-compilation approach is different. - Clang, - /// Tool is the MSVC cl.exe. - Msvc, -} - -impl ToolFamily { - /// What the flag to request debug info for this family of tools look like - fn debug_flag(&self) -> &'static str { - match *self { - ToolFamily::Msvc => "/Z7", - ToolFamily::Gnu | - ToolFamily::Clang => "-g", - } - } - - /// What the flag to include directories into header search path looks like - fn include_flag(&self) -> &'static str { - match *self { - ToolFamily::Msvc => "/I", - ToolFamily::Gnu | - ToolFamily::Clang => "-I", - } - } - - /// What the flag to request macro-expanded source output looks like - fn expand_flag(&self) -> &'static str { - match *self { - ToolFamily::Msvc => "/E", - ToolFamily::Gnu | - ToolFamily::Clang => "-E", - } - } - - /// What the flags to enable all warnings - fn warnings_flags(&self) -> &'static [&'static str] { - static MSVC_FLAGS: &'static [&'static str] = &["/W4"]; - static GNU_CLANG_FLAGS: &'static [&'static str] = &["-Wall", "-Wextra"]; - - match *self { - ToolFamily::Msvc => &MSVC_FLAGS, - ToolFamily::Gnu | - ToolFamily::Clang => &GNU_CLANG_FLAGS, - } - } - - /// What the flag to turn warning into errors - fn warnings_to_errors_flag(&self) -> &'static str { - match *self { - ToolFamily::Msvc => "/WX", - ToolFamily::Gnu | - ToolFamily::Clang => "-Werror" - } - } -} - -/// 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("foo", &["foo.c", "bar.c"]); -/// ``` -#[deprecated] -#[doc(hidden)] -pub fn compile_library(output: &str, files: &[&str]) { - let mut c = Build::new(); - for f in files.iter() { - c.file(*f); - } - c.compile(output); -} - -impl Build { - /// Construct a new instance of a blank set of configuration. - /// - /// This builder is finished with the [`compile`] function. - /// - /// [`compile`]: struct.Build.html#method.compile - pub fn new() -> Build { - Build { - include_directories: Vec::new(), - definitions: Vec::new(), - objects: Vec::new(), - flags: Vec::new(), - flags_supported: Vec::new(), - files: Vec::new(), - shared_flag: None, - static_flag: None, - 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, - static_crt: None, - warnings: true, - warnings_into_errors: false, - } - } - - /// Add a directory to the `-I` or include path for headers - /// - /// # Example - /// - /// ```no_run - /// use std::path::Path; - /// - /// let library_path = Path::new("/path/to/library"); - /// - /// gcc::Build::new() - /// .file("src/foo.c") - /// .include(library_path) - /// .include("src") - /// .compile("foo"); - /// ``` - pub fn include<P: AsRef<Path>>(&mut self, dir: P) -> &mut Build { - self.include_directories.push(dir.as_ref().to_path_buf()); - self - } - - /// Specify a `-D` variable with an optional value. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .define("FOO", "BAR") - /// .define("BAZ", None) - /// .compile("foo"); - /// ``` - pub fn define<'a, V: Into<Option<&'a str>>>(&mut self, var: &str, val: V) -> &mut Build { - self.definitions.push((var.to_string(), val.into().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 Build { - self.objects.push(obj.as_ref().to_path_buf()); - self - } - - /// Add an arbitrary flag to the invocation of the compiler - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .flag("-ffunction-sections") - /// .compile("foo"); - /// ``` - pub fn flag(&mut self, flag: &str) -> &mut Build { - self.flags.push(flag.to_string()); - self - } - - fn ensure_check_file(&self) -> Result<PathBuf, Error> { - let out_dir = self.get_out_dir()?; - let src = if self.cpp { - out_dir.join("flag_check.cpp") - } else { - out_dir.join("flag_check.c") - }; - - if !src.exists() { - let mut f = fs::File::create(&src)?; - write!(f, "int main(void) {{ return 0; }}")?; - } - - Ok(src) - } - - fn is_flag_supported(&self, flag: &str) -> Result<bool, Error> { - let out_dir = self.get_out_dir()?; - let src = self.ensure_check_file()?; - let obj = out_dir.join("flag_check"); - let target = self.get_target()?; - let mut cfg = Build::new(); - cfg.flag(flag) - .target(&target) - .opt_level(0) - .host(&target) - .debug(false) - .cpp(self.cpp); - let compiler = cfg.try_get_compiler()?; - let mut cmd = compiler.to_command(); - command_add_output_file(&mut cmd, &obj, target.contains("msvc"), false); - cmd.arg(&src); - - let output = cmd.output()?; - Ok(output.stderr.is_empty()) - } - - /// Add an arbitrary flag to the invocation of the compiler if it supports it - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .flag_if_supported("-Wlogical-op") // only supported by GCC - /// .flag_if_supported("-Wunreachable-code") // only supported by clang - /// .compile("foo"); - /// ``` - pub fn flag_if_supported(&mut self, flag: &str) -> &mut Build { - self.flags_supported.push(flag.to_string()); - self - } - - /// Set the `-shared` flag. - /// - /// When enabled, the compiler will produce a shared object which can - /// then be linked with other objects to form an executable. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .shared_flag(true) - /// .compile("libfoo.so"); - /// ``` - - pub fn shared_flag(&mut self, shared_flag: bool) -> &mut Build { - self.shared_flag = Some(shared_flag); - self - } - - /// Set the `-static` flag. - /// - /// When enabled on systems that support dynamic linking, this prevents - /// linking with the shared libraries. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .shared_flag(true) - /// .static_flag(true) - /// .compile("foo"); - /// ``` - pub fn static_flag(&mut self, static_flag: bool) -> &mut Build { - self.static_flag = Some(static_flag); - self - } - - /// Add a file which will be compiled - pub fn file<P: AsRef<Path>>(&mut self, p: P) -> &mut Build { - self.files.push(p.as_ref().to_path_buf()); - self - } - - /// Add files which will be compiled - pub fn files<P>(&mut self, p: P) -> &mut Build - where P: IntoIterator, - P::Item: AsRef<Path> { - for file in p.into_iter() { - self.file(file); - } - 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 Build { - self.cpp = cpp; - self - } - - /// Set warnings into errors flag. - /// - /// Disabled by default. - /// - /// Warning: turning warnings into errors only make sense - /// if you are a developer of the crate using gcc-rs. - /// Some warnings only appear on some architecture or - /// specific version of the compiler. Any user of this crate, - /// or any other crate depending on it, could fail during - /// compile time. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .warnings_into_errors(true) - /// .compile("libfoo.a"); - /// ``` - pub fn warnings_into_errors(&mut self, warnings_into_errors: bool) -> &mut Build { - self.warnings_into_errors = warnings_into_errors; - self - } - - /// Set warnings flags. - /// - /// Adds some flags: - /// - "/Wall" for MSVC. - /// - "-Wall", "-Wextra" for GNU and Clang. - /// - /// Enabled by default. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .warnings(false) - /// .compile("libfoo.a"); - /// ``` - pub fn warnings(&mut self, warnings: bool) -> &mut Build { - self.warnings = warnings; - 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. - /// - /// Common values: - /// - `stdc++` for GNU - /// - `c++` for Clang - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .shared_flag(true) - /// .cpp_link_stdlib("stdc++") - /// .compile("libfoo.so"); - /// ``` - pub fn cpp_link_stdlib<'a, V: Into<Option<&'a str>>>(&mut self, cpp_link_stdlib: V) -> &mut Build { - self.cpp_link_stdlib = Some(cpp_link_stdlib.into().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. - /// - /// Common values: - /// - `stdc++` for GNU - /// - `c++` for Clang - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .cpp_set_stdlib("c++") - /// .compile("libfoo.a"); - /// ``` - pub fn cpp_set_stdlib<'a, V: Into<Option<&'a str>>>(&mut self, cpp_set_stdlib: V) -> &mut Build { - let cpp_set_stdlib = cpp_set_stdlib.into(); - 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. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .target("aarch64-linux-android") - /// .compile("foo"); - /// ``` - pub fn target(&mut self, target: &str) -> &mut Build { - 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. - /// - /// # Example - /// - /// ```no_run - /// gcc::Build::new() - /// .file("src/foo.c") - /// .host("arm-linux-gnueabihf") - /// .compile("foo"); - /// ``` - pub fn host(&mut self, host: &str) -> &mut Build { - 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 Build { - self.opt_level = Some(opt_level.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_str(&mut self, opt_level: &str) -> &mut Build { - self.opt_level = Some(opt_level.to_string()); - 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 Build { - 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 Build { - 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 Build { - 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 Build { - 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`. - /// - /// The emitted metadata is: - /// - /// - `rustc-link-lib=static=`*compiled lib* - /// - `rustc-link-search=native=`*target folder* - /// - When target is MSVC, the ATL-MFC libs are added via `rustc-link-search=native=` - /// - When C++ is enabled, the C++ stdlib is added via `rustc-link-lib` - /// - pub fn cargo_metadata(&mut self, cargo_metadata: bool) -> &mut Build { - self.cargo_metadata = cargo_metadata; - self - } - - /// Configures whether the compiler will emit position independent code. - /// - /// This option defaults to `false` for `windows-gnu` targets and - /// to `true` for all other targets. - pub fn pic(&mut self, pic: bool) -> &mut Build { - self.pic = Some(pic); - self - } - - /// Configures whether the /MT flag or the /MD flag will be passed to msvc build tools. - /// - /// This option defaults to `false`, and affect only msvc targets. - pub fn static_crt(&mut self, static_crt: bool) -> &mut Build { - self.static_crt = Some(static_crt); - self - } - - #[doc(hidden)] - pub fn __set_env<A, B>(&mut self, a: A, b: B) -> &mut Build - 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` - /// - /// This will return a result instead of panicing; see compile() for the complete description. - pub fn try_compile(&self, output: &str) -> Result<(), Error> { - let (lib_name, gnu_lib_name) = if output.starts_with("lib") && output.ends_with(".a") { - (&output[3..output.len() - 2], output.to_owned()) - } else { - let mut gnu = String::with_capacity(5 + output.len()); - gnu.push_str("lib"); - gnu.push_str(&output); - gnu.push_str(".a"); - (output, gnu) - }; - 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().ok_or_else(|| Error::new(ErrorKind::IOError, "Getting object file details failed."))?) - } else { - obj - }; - - match obj.parent() { - Some(s) => fs::create_dir_all(s)?, - None => return Err(Error::new(ErrorKind::IOError, "Getting object file details failed.")), - }; - - src_dst.push((file.to_path_buf(), obj.clone())); - objects.push(obj); - } - self.compile_objects(&src_dst)?; - self.assemble(lib_name, &dst.join(gnu_lib_name), &objects)?; - - if self.get_target()?.contains("msvc") { - let compiler = self.get_base_compiler()?; - let atlmfc_lib = compiler.env() - .iter() - .find(|&&(ref var, _)| var.as_os_str() == OsStr::new("LIB")) - .and_then(|&(_, ref lib_paths)| { - env::split_paths(lib_paths).find(|path| { - let sub = Path::new("atlmfc/lib"); - path.ends_with(sub) || path.parent().map_or(false, |p| p.ends_with(sub)) - }) - }); - - if let Some(atlmfc_lib) = atlmfc_lib { - self.print(&format!("cargo:rustc-link-search=native={}", atlmfc_lib.display())); - } - } - - self.print(&format!("cargo:rustc-link-lib=static={}", lib_name)); - 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)); - } - } - - Ok(()) - } - - /// Run the compiler, generating the file `output` - /// - /// The name `output` should be the name of the library. For backwards compatibility, - /// the `output` may start with `lib` and end with `.a`. The Rust compilier will create - /// the assembly with the lib prefix and .a extension. MSVC will create a file without prefix, - /// ending with `.lib`. - /// - /// # Panics - /// - /// Panics if `output` is not formatted correctly or if one of the underlying - /// compiler commands fails. It can also panic if it fails reading file names - /// or creating directories. - pub fn compile(&self, output: &str) { - if let Err(e) = self.try_compile(output) { - fail(&e.message); - } - } - - #[cfg(feature = "parallel")] - fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) -> Result<(), Error> { - 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.num_threads(amt); - } - } - drop(rayon::initialize(cfg)); - - let results: Mutex<Vec<Result<(), Error>>> = Mutex::new(Vec::new()); - - objs.par_iter().with_max_len(1) - .for_each(|&(ref src, ref dst)| results.lock().unwrap().push(self.compile_object(src, dst))); - - // Check for any errors and return the first one found. - for result in results.into_inner().unwrap().iter() { - if result.is_err() { - return result.clone(); - } - } - - Ok(()) - } - - #[cfg(not(feature = "parallel"))] - fn compile_objects(&self, objs: &[(PathBuf, PathBuf)]) -> Result<(), Error> { - for &(ref src, ref dst) in objs { - self.compile_object(src, dst)?; - } - Ok(()) - } - - fn compile_object(&self, file: &Path, dst: &Path) -> Result<(), Error> { - 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.try_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() - .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))? - .to_string_lossy() - .into_owned()) - }; - command_add_output_file(&mut cmd, dst, msvc, is_asm); - cmd.arg(if msvc { "/c" } else { "-c" }); - cmd.arg(file); - - run(&mut cmd, &name)?; - Ok(()) - } - - /// This will return a result instead of panicing; see expand() for the complete description. - pub fn try_expand(&self) -> Result<Vec<u8>, Error> { - let compiler = self.try_get_compiler()?; - let mut cmd = compiler.to_command(); - for &(ref a, ref b) in self.env.iter() { - cmd.env(a, b); - } - cmd.arg(compiler.family.expand_flag()); - - assert!(self.files.len() <= 1, - "Expand may only be called for a single file"); - - for file in self.files.iter() { - cmd.arg(file); - } - - let name = compiler.path - .file_name() - .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get compiler path."))? - .to_string_lossy() - .into_owned(); - - Ok(run_output(&mut cmd, &name)?) - } - - /// Run the compiler, returning the macro-expanded version of the input files. - /// - /// This is only relevant for C and C++ files. - /// - /// # Panics - /// Panics if more than one file is present in the config, or if compiler - /// path has an invalid file name. - /// - /// # Example - /// ```no_run - /// let out = gcc::Build::new() - /// .file("src/foo.c") - /// .expand(); - /// ``` - pub fn expand(&self) -> Vec<u8> { - match self.try_expand() { - Err(e) => fail(&e.message), - Ok(v) => v, - } - } - - /// 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. - /// - /// # Panics - /// - /// Panics if an error occurred while determining the architecture. - pub fn get_compiler(&self) -> Tool { - match self.try_get_compiler() { - Ok(tool) => tool, - Err(e) => fail(&e.message), - } - } - - /// Get the compiler that's in use for this configuration. - /// - /// This will return a result instead of panicing; see get_compiler() for the complete description. - pub fn try_get_compiler(&self) -> Result<Tool, Error> { - let opt_level = self.get_opt_level()?; - let target = self.get_target()?; - - let mut cmd = self.get_base_compiler()?; - let nvcc = cmd.path.file_name() - .and_then(|p| p.to_str()).map(|p| p.contains("nvcc")) - .unwrap_or(false); - - // Non-target flags - // If the flag is not conditioned on target variable, it belongs here :) - match cmd.family { - ToolFamily::Msvc => { - cmd.args.push("/nologo".into()); - - let crt_flag = match self.static_crt { - Some(true) => "/MT", - Some(false) => "/MD", - None => { - let features = env::var("CARGO_CFG_TARGET_FEATURE") - .unwrap_or(String::new()); - if features.contains("crt-static") { - "/MT" - } else { - "/MD" - } - }, - }; - cmd.args.push(crt_flag.into()); - - match &opt_level[..] { - "z" | "s" => cmd.args.push("/Os".into()), - "1" => cmd.args.push("/O1".into()), - // -O3 is a valid value for gcc and clang compilers, but not msvc. Cap to /O2. - "2" | "3" => cmd.args.push("/O2".into()), - _ => {} - } - } - ToolFamily::Gnu | - ToolFamily::Clang => { - // arm-linux-androideabi-gcc 4.8 shipped with Android NDK does - // not support '-Oz' - if opt_level == "z" && cmd.family != ToolFamily::Clang { - cmd.args.push("-Os".into()); - } else { - cmd.args.push(format!("-O{}", opt_level).into()); - } - - if !nvcc { - cmd.args.push("-ffunction-sections".into()); - cmd.args.push("-fdata-sections".into()); - if self.pic.unwrap_or(!target.contains("windows-gnu")) { - cmd.args.push("-fPIC".into()); - } - } else if self.pic.unwrap_or(false) { - cmd.args.push("-Xcompiler".into()); - cmd.args.push("\'-fPIC\'".into()); - } - } - } - for arg in self.envflags(if self.cpp {"CXXFLAGS"} else {"CFLAGS"}) { - cmd.args.push(arg.into()); - } - - if self.get_debug() { - cmd.args.push(cmd.family.debug_flag().into()); - } - - // Target flags - match cmd.family { - ToolFamily::Clang => { - cmd.args.push(format!("--target={}", target).into()); - } - ToolFamily::Msvc => { - if target.contains("i586") { - cmd.args.push("/ARCH:IA32".into()); - } - } - ToolFamily::Gnu => { - 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 self.static_flag.is_none() && target.contains("musl") { - cmd.args.push("-static".into()); - } - - // armv7 targets get to use armv7 instructions - if target.starts_with("armv7-") && target.contains("-linux-") { - cmd.args.push("-march=armv7-a".into()); - } - - // On android we can guarantee some extra float instructions - // (specified in the android spec online) - if target.starts_with("armv7-linux-androideabi") { - cmd.args.push("-march=armv7-a".into()); - cmd.args.push("-mfpu=vfpv3-d16".into()); - cmd.args.push("-mfloat-abi=softfp".into()); - } - - // For us arm == armv6 by default - if target.starts_with("arm-unknown-linux-") { - cmd.args.push("-march=armv6".into()); - cmd.args.push("-marm".into()); - } - - // We can guarantee some settings for FRC - if target.starts_with("arm-frc-") { - cmd.args.push("-march=armv7-a".into()); - cmd.args.push("-mcpu=cortex-a9".into()); - cmd.args.push("-mfpu=vfpv3".into()); - cmd.args.push("-mfloat-abi=softfp".into()); - cmd.args.push("-marm".into()); - } - - // Turn codegen down on i586 to avoid some instructions. - if target.starts_with("i586-unknown-linux-") { - cmd.args.push("-march=pentium".into()); - } - - // Set codegen level for i686 correctly - if target.starts_with("i686-unknown-linux-") { - cmd.args.push("-march=i686".into()); - } - - // Looks like `musl-gcc` makes is hard for `-m32` to make its way - // all the way to the linker, so we need to actually instruct the - // linker that we're generating 32-bit executables as well. This'll - // typically only be used for build scripts which transitively use - // these flags that try to compile executables. - if target == "i686-unknown-linux-musl" { - cmd.args.push("-Wl,-melf_i386".into()); - } - - if target.starts_with("thumb") { - cmd.args.push("-mthumb".into()); - - if target.ends_with("eabihf") { - cmd.args.push("-mfloat-abi=hard".into()) - } - } - if target.starts_with("thumbv6m") { - cmd.args.push("-march=armv6s-m".into()); - } - if target.starts_with("thumbv7em") { - cmd.args.push("-march=armv7e-m".into()); - - if target.ends_with("eabihf") { - cmd.args.push("-mfpu=fpv4-sp-d16".into()) - } - } - if target.starts_with("thumbv7m") { - cmd.args.push("-march=armv7-m".into()); - } - } - } - - if target.contains("-ios") { - // FIXME: potential bug. iOS is always compiled with Clang, but Gcc compiler may be - // detected instead. - self.ios_flags(&mut cmd)?; - } - - if self.static_flag.unwrap_or(false) { - cmd.args.push("-static".into()); - } - if self.shared_flag.unwrap_or(false) { - cmd.args.push("-shared".into()); - } - - if self.cpp { - match (self.cpp_set_stdlib.as_ref(), cmd.family) { - (None, _) => { } - (Some(stdlib), ToolFamily::Gnu) | - (Some(stdlib), ToolFamily::Clang) => { - cmd.args.push(format!("-stdlib=lib{}", stdlib).into()); - } - _ => { - println!("cargo:warning=cpp_set_stdlib is specified, but the {:?} compiler \ - does not support this option, ignored", cmd.family); - } - } - } - - for directory in self.include_directories.iter() { - cmd.args.push(cmd.family.include_flag().into()); - cmd.args.push(directory.into()); - } - - for flag in self.flags.iter() { - cmd.args.push(flag.into()); - } - - for flag in self.flags_supported.iter() { - if self.is_flag_supported(flag).unwrap_or(false) { - cmd.args.push(flag.into()); - } - } - - for &(ref key, ref value) in self.definitions.iter() { - let lead = if let ToolFamily::Msvc = cmd.family {"/"} 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()); - } - } - - if self.warnings { - for flag in cmd.family.warnings_flags().iter() { - cmd.args.push(flag.into()); - } - } - - if self.warnings_into_errors { - cmd.args.push(cmd.family.warnings_to_errors_flag().into()); - } - - Ok(cmd) - } - - fn msvc_macro_assembler(&self) -> Result<(Command, String), Error> { - 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); - } - - Ok((cmd, tool.to_string())) - } - - fn assemble(&self, lib_name: &str, dst: &Path, objects: &[PathBuf]) -> Result<(), Error> { - // 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_else(|| 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); - match 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(_) => (), - Err(_) => return Err(Error::new(ErrorKind::IOError, "Could not copy or create a hard-link to the generated lib file.")), - }; - } else { - let ar = self.get_ar()?; - let cmd = ar.file_name() - .ok_or_else(|| Error::new(ErrorKind::IOError, "Failed to get archiver (ar) path."))? - .to_string_lossy(); - run(self.cmd(&ar) - .arg("crs") - .arg(dst) - .args(objects) - .args(&self.objects), - &cmd)?; - } - - Ok(()) - } - - fn ios_flags(&self, cmd: &mut Tool) -> Result<(), Error> { - enum ArchSpec { - Device(&'static str), - Simulator(&'static str), - } - - let target = self.get_target()?; - let arch = target.split('-').nth(0).ok_or_else(|| Error::new(ErrorKind::ArchitectureInvalid, "Unknown architecture for iOS target."))?; - 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"), - _ => return Err(Error::new(ErrorKind::ArchitectureInvalid, "Unknown architecture 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()? - .stdout; - - let sdk_path = match String::from_utf8(sdk_path) { - Ok(p) => p, - Err(_) => return Err(Error::new(ErrorKind::IOError, "Unable to determine iOS SDK path.")), - }; - - cmd.args.push("-isysroot".into()); - cmd.args.push(sdk_path.trim().into()); - - Ok(()) - } - - 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); - } - cmd - } - - fn get_base_compiler(&self) -> Result<Tool, Error> { - if let Some(ref c) = self.compiler { - return Ok(Tool::new(c.clone())); - } - let host = self.get_host()?; - let target = self.get_target()?; - let (env, msvc, gnu) = if self.cpp { - ("CXX", "cl.exe", "g++") - } else { - ("CC", "cl.exe", "gcc") - }; - - let default = if host.contains("solaris") { - // In this case, c++/cc unlikely to exist or be correct. - gnu - } else if self.cpp { - "c++" - } else { - "cc" - }; - - let tool_opt: Option<Tool> = self.env_tool(env) - .map(|(tool, args)| { - let mut t = Tool::new(PathBuf::from(tool)); - for arg in args { - t.args.push(arg.into()); - } - t - }) - .or_else(|| { - if target.contains("emscripten") { - let tool = if self.cpp { - "em++" - } else { - "emcc" - }; - // Windows uses bat file so we have to be a bit more specific - if cfg!(windows) { - let mut t = Tool::new(PathBuf::from("cmd")); - t.args.push("/c".into()); - t.args.push(format!("{}.bat", tool).into()); - Some(t) - } else { - Some(Tool::new(PathBuf::from(tool))) - } - } else { - None - } - }) - .or_else(|| windows_registry::find_tool(&target, "cl.exe")); - - let tool = match tool_opt { - Some(t) => t, - None => { - 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.replace("armv7", "arm"), gnu) - } else if self.get_host()? != target { - // CROSS_COMPILE is of the form: "arm-linux-gnueabi-" - let cc_env = self.getenv("CROSS_COMPILE"); - let cross_compile = cc_env.as_ref().map(|s| s.trim_right_matches('-')); - let prefix = cross_compile.or(match &target[..] { - "aarch64-unknown-linux-gnu" => Some("aarch64-linux-gnu"), - "arm-unknown-linux-gnueabi" => Some("arm-linux-gnueabi"), - "arm-frc-linux-gnueabi" => Some("arm-frc-linux-gnueabi"), - "arm-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"), - "arm-unknown-linux-musleabi" => Some("arm-linux-musleabi"), - "arm-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"), - "arm-unknown-netbsd-eabi" => Some("arm--netbsdelf-eabi"), - "armv6-unknown-netbsd-eabihf" => Some("armv6--netbsdelf-eabihf"), - "armv7-unknown-linux-gnueabihf" => Some("arm-linux-gnueabihf"), - "armv7-unknown-linux-musleabihf" => Some("arm-linux-musleabihf"), - "armv7-unknown-netbsd-eabihf" => Some("armv7--netbsdelf-eabihf"), - "i686-pc-windows-gnu" => Some("i686-w64-mingw32"), - "i686-unknown-linux-musl" => Some("musl"), - "i686-unknown-netbsd" => Some("i486--netbsdelf"), - "mips-unknown-linux-gnu" => Some("mips-linux-gnu"), - "mipsel-unknown-linux-gnu" => Some("mipsel-linux-gnu"), - "mips64-unknown-linux-gnuabi64" => Some("mips64-linux-gnuabi64"), - "mips64el-unknown-linux-gnuabi64" => Some("mips64el-linux-gnuabi64"), - "powerpc-unknown-linux-gnu" => Some("powerpc-linux-gnu"), - "powerpc-unknown-netbsd" => Some("powerpc--netbsd"), - "powerpc64-unknown-linux-gnu" => Some("powerpc-linux-gnu"), - "powerpc64le-unknown-linux-gnu" => Some("powerpc64le-linux-gnu"), - "s390x-unknown-linux-gnu" => Some("s390x-linux-gnu"), - "sparc64-unknown-netbsd" => Some("sparc64--netbsd"), - "sparcv9-sun-solaris" => Some("sparcv9-sun-solaris"), - "thumbv6m-none-eabi" => Some("arm-none-eabi"), - "thumbv7em-none-eabi" => Some("arm-none-eabi"), - "thumbv7em-none-eabihf" => Some("arm-none-eabi"), - "thumbv7m-none-eabi" => Some("arm-none-eabi"), - "x86_64-pc-windows-gnu" => Some("x86_64-w64-mingw32"), - "x86_64-rumprun-netbsd" => Some("x86_64-rumprun-netbsd"), - "x86_64-unknown-linux-musl" => Some("musl"), - "x86_64-unknown-netbsd" => Some("x86_64--netbsd"), - _ => None, - }); - match prefix { - Some(prefix) => format!("{}-{}", prefix, gnu), - None => default.to_string(), - } - } else { - default.to_string() - }; - Tool::new(PathBuf::from(compiler)) - } - }; - - Ok(tool) - } - - fn get_var(&self, var_base: &str) -> Result<String, Error> { - 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(Error::new(ErrorKind::EnvVarNotFound, &format!("Could not find environment variable {}.", var_base))), - } - } - - 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", "sccache"]; - 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) -> Result<Option<String>, Error> { - match self.cpp_link_stdlib.clone() { - Some(s) => Ok(s), - None => { - let target = self.get_target()?; - if target.contains("msvc") { - Ok(None) - } else if target.contains("darwin") { - Ok(Some("c++".to_string())) - } else if target.contains("freebsd") { - Ok(Some("c++".to_string())) - } else { - Ok(Some("stdc++".to_string())) - } - }, - } - } - - fn get_ar(&self) -> Result<PathBuf, Error> { - match self.archiver - .clone() - .or_else(|| self.get_var("AR").map(PathBuf::from).ok()) { - Some(p) => Ok(p), - None => { - if self.get_target()?.contains("android") { - Ok(PathBuf::from(format!("{}-ar", self.get_target()?.replace("armv7", "arm")))) - } else if self.get_target()?.contains("emscripten") { - //Windows use bat files so we have to be a bit more specific - let tool = if cfg!(windows) { - "emar.bat" - } else { - "emar" - }; - - Ok(PathBuf::from(tool)) - } else { - Ok(PathBuf::from("ar")) - } - } - } - } - - fn get_target(&self) -> Result<String, Error> { - match self.target.clone() { - Some(t) => Ok(t), - None => Ok(self.getenv_unwrap("TARGET")?), - } - } - - fn get_host(&self) -> Result<String, Error> { - match self.host.clone() { - Some(h) => Ok(h), - None => Ok(self.getenv_unwrap("HOST")?), - } - } - - fn get_opt_level(&self) -> Result<String, Error> { - match self.opt_level.as_ref().cloned() { - Some(ol) => Ok(ol), - None => Ok(self.getenv_unwrap("OPT_LEVEL")?), - } - } - - fn get_debug(&self) -> bool { - self.debug.unwrap_or_else(|| { - match self.getenv("DEBUG") { - Some(s) => s != "false", - None => false, - } - }) - } - - fn get_out_dir(&self) -> Result<PathBuf, Error> { - match self.out_dir.clone() { - Some(p) => Ok(p), - None => Ok(env::var_os("OUT_DIR") - .map(PathBuf::from) - .ok_or_else(|| Error::new(ErrorKind::EnvVarNotFound, "Environment variable OUT_DIR not defined."))?), - } - } - - 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) -> Result<String, Error> { - match self.getenv(v) { - Some(s) => Ok(s), - None => Err(Error::new(ErrorKind::EnvVarNotFound, &format!("Environment variable {} not defined.", v.to_string()))), - } - } - - fn print(&self, s: &str) { - if self.cargo_metadata { - println!("{}", s); - } - } -} - -impl Default for Build { - fn default() -> Build { - Build::new() - } -} - -impl Tool { - fn new(path: PathBuf) -> Tool { - // Try to detect family of the tool from its name, falling back to Gnu. - let family = if let Some(fname) = path.file_name().and_then(|p| p.to_str()) { - if fname.contains("clang") { - ToolFamily::Clang - } else if fname.contains("cl") && !fname.contains("uclibc") { - ToolFamily::Msvc - } else { - ToolFamily::Gnu - } - } else { - ToolFamily::Gnu - }; - Tool { - path: path, - args: Vec::new(), - env: Vec::new(), - family: family - } - } - - /// 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); - } - 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) -> Result<(), Error> { - let (mut child, print) = spawn(cmd, program)?; - let status = match child.wait() { - Ok(s) => s, - Err(_) => return Err(Error::new(ErrorKind::ToolExecError, &format!("Failed to wait on spawned child process, command {:?} with args {:?}.", cmd, program))), - }; - print.join().unwrap(); - println!("{}", status); - - if status.success() { - Ok(()) - } else { - Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} did not execute successfully (status code {}).", cmd, program, status))) - } -} - -fn run_output(cmd: &mut Command, program: &str) -> Result<Vec<u8>, Error> { - cmd.stdout(Stdio::piped()); - let (mut child, print) = spawn(cmd, program)?; - let mut stdout = vec![]; - child.stdout.take().unwrap().read_to_end(&mut stdout).unwrap(); - let status = match child.wait() { - Ok(s) => s, - Err(_) => return Err(Error::new(ErrorKind::ToolExecError, &format!("Failed to wait on spawned child process, command {:?} with args {:?}.", cmd, program))), - }; - print.join().unwrap(); - println!("{}", status); - - if status.success() { - Ok(stdout) - } else { - Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} did not execute successfully (status code {}).", cmd, program, status))) - } -} - -fn spawn(cmd: &mut Command, program: &str) -> Result<(Child, JoinHandle<()>), Error> { - 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. - match cmd.stderr(Stdio::piped()).spawn() { - Ok(mut child) => { - let stderr = BufReader::new(child.stderr.take().unwrap()); - let print = thread::spawn(move || { - for line in stderr.split(b'\n').filter_map(|l| l.ok()) { - print!("cargo:warning="); - std::io::stdout().write_all(&line).unwrap(); - println!(""); - } - }); - Ok((child, print)) - } - 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 { - "" - }; - Err(Error::new(ErrorKind::ToolNotFound, &format!("Failed to find tool. Is `{}` installed?{}", program, extra))) - } - Err(_) => Err(Error::new(ErrorKind::ToolExecError, &format!("Command {:?} with args {:?} failed to start.", cmd, program))), - } -} - -fn fail(s: &str) -> ! { - panic!("\n\nInternal error occurred: {}\n\n", s) -} - - -fn command_add_output_file(cmd: &mut Command, dst: &Path, msvc: bool, is_asm: bool) { - 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); - } -} |