diff options
Diffstat (limited to 'src/bootstrap/bin')
| -rw-r--r-- | src/bootstrap/bin/llvm-config-wrapper.rs | 24 | ||||
| -rw-r--r-- | src/bootstrap/bin/main.rs | 100 | ||||
| -rw-r--r-- | src/bootstrap/bin/rustc.rs | 369 | ||||
| -rw-r--r-- | src/bootstrap/bin/rustdoc.rs | 81 | ||||
| -rw-r--r-- | src/bootstrap/bin/sccache-plus-cl.rs | 38 |
5 files changed, 612 insertions, 0 deletions
diff --git a/src/bootstrap/bin/llvm-config-wrapper.rs b/src/bootstrap/bin/llvm-config-wrapper.rs new file mode 100644 index 000000000..89984bb55 --- /dev/null +++ b/src/bootstrap/bin/llvm-config-wrapper.rs @@ -0,0 +1,24 @@ +// The sheer existence of this file is an awful hack. See the comments in +// `src/bootstrap/native.rs` for why this is needed when compiling LLD. + +use std::env; +use std::io::{self, Write}; +use std::process::{self, Command, Stdio}; + +fn main() { + let real_llvm_config = env::var_os("LLVM_CONFIG_REAL").unwrap(); + let mut cmd = Command::new(real_llvm_config); + cmd.args(env::args().skip(1)).stderr(Stdio::piped()); + let output = cmd.output().expect("failed to spawn llvm-config"); + let mut stdout = String::from_utf8_lossy(&output.stdout); + + if let Ok(to_replace) = env::var("LLVM_CONFIG_SHIM_REPLACE") { + if let Ok(replace_with) = env::var("LLVM_CONFIG_SHIM_REPLACE_WITH") { + stdout = stdout.replace(&to_replace, &replace_with).into(); + } + } + + print!("{}", stdout.replace("\\", "/")); + io::stdout().flush().unwrap(); + process::exit(output.status.code().unwrap_or(1)); +} diff --git a/src/bootstrap/bin/main.rs b/src/bootstrap/bin/main.rs new file mode 100644 index 000000000..9b4861ccd --- /dev/null +++ b/src/bootstrap/bin/main.rs @@ -0,0 +1,100 @@ +//! rustbuild, the Rust build system +//! +//! This is the entry point for the build system used to compile the `rustc` +//! compiler. Lots of documentation can be found in the `README.md` file in the +//! parent directory, and otherwise documentation can be found throughout the `build` +//! directory in each respective module. + +use std::env; + +use bootstrap::{t, Build, Config, Subcommand, VERSION}; + +fn main() { + let args = env::args().skip(1).collect::<Vec<_>>(); + let config = Config::parse(&args); + + let mut build_lock; + let _build_lock_guard; + if cfg!(any(unix, windows)) { + build_lock = fd_lock::RwLock::new(t!(std::fs::File::create(config.out.join("lock")))); + _build_lock_guard = match build_lock.try_write() { + Ok(lock) => lock, + err => { + println!("warning: build directory locked, waiting for lock"); + drop(err); + t!(build_lock.write()) + } + }; + } else { + println!("warning: file locking not supported for target, not locking build directory"); + } + + // check_version warnings are not printed during setup + let changelog_suggestion = + if matches!(config.cmd, Subcommand::Setup { .. }) { None } else { check_version(&config) }; + + // NOTE: Since `./configure` generates a `config.toml`, distro maintainers will see the + // changelog warning, not the `x.py setup` message. + let suggest_setup = !config.config.exists() && !matches!(config.cmd, Subcommand::Setup { .. }); + if suggest_setup { + println!("warning: you have not made a `config.toml`"); + println!( + "help: consider running `./x.py setup` or copying `config.toml.example` by running \ + `cp config.toml.example config.toml`" + ); + } else if let Some(suggestion) = &changelog_suggestion { + println!("{}", suggestion); + } + + let pre_commit = config.src.join(".git").join("hooks").join("pre-commit"); + Build::new(config).build(); + + if suggest_setup { + println!("warning: you have not made a `config.toml`"); + println!( + "help: consider running `./x.py setup` or copying `config.toml.example` by running \ + `cp config.toml.example config.toml`" + ); + } else if let Some(suggestion) = &changelog_suggestion { + println!("{}", suggestion); + } + + // Give a warning if the pre-commit script is in pre-commit and not pre-push. + // HACK: Since the commit script uses hard links, we can't actually tell if it was installed by x.py setup or not. + // We could see if it's identical to src/etc/pre-push.sh, but pre-push may have been modified in the meantime. + // Instead, look for this comment, which is almost certainly not in any custom hook. + if std::fs::read_to_string(pre_commit).map_or(false, |contents| { + contents.contains("https://github.com/rust-lang/rust/issues/77620#issuecomment-705144570") + }) { + println!( + "warning: You have the pre-push script installed to .git/hooks/pre-commit. \ + Consider moving it to .git/hooks/pre-push instead, which runs less often." + ); + } + + if suggest_setup || changelog_suggestion.is_some() { + println!("note: this message was printed twice to make it more likely to be seen"); + } +} + +fn check_version(config: &Config) -> Option<String> { + let mut msg = String::new(); + + let suggestion = if let Some(seen) = config.changelog_seen { + if seen != VERSION { + msg.push_str("warning: there have been changes to x.py since you last updated.\n"); + format!("update `config.toml` to use `changelog-seen = {}` instead", VERSION) + } else { + return None; + } + } else { + msg.push_str("warning: x.py has made several changes recently you may want to look at\n"); + format!("add `changelog-seen = {}` at the top of `config.toml`", VERSION) + }; + + msg.push_str("help: consider looking at the changes in `src/bootstrap/CHANGELOG.md`\n"); + msg.push_str("note: to silence this warning, "); + msg.push_str(&suggestion); + + Some(msg) +} diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs new file mode 100644 index 000000000..40a3cc6d1 --- /dev/null +++ b/src/bootstrap/bin/rustc.rs @@ -0,0 +1,369 @@ +//! Shim which is passed to Cargo as "rustc" when running the bootstrap. +//! +//! This shim will take care of some various tasks that our build process +//! requires that Cargo can't quite do through normal configuration: +//! +//! 1. When compiling build scripts and build dependencies, we need a guaranteed +//! full standard library available. The only compiler which actually has +//! this is the snapshot, so we detect this situation and always compile with +//! the snapshot compiler. +//! 2. We pass a bunch of `--cfg` and other flags based on what we're compiling +//! (and this slightly differs based on a whether we're using a snapshot or +//! not), so we do that all here. +//! +//! This may one day be replaced by RUSTFLAGS, but the dynamic nature of +//! switching compilers for the bootstrap and for build scripts will probably +//! never get replaced. + +include!("../dylib_util.rs"); + +use std::env; +use std::path::PathBuf; +use std::process::{Child, Command}; +use std::str::FromStr; +use std::time::Instant; + +fn main() { + let args = env::args_os().skip(1).collect::<Vec<_>>(); + + // Detect whether or not we're a build script depending on whether --target + // is passed (a bit janky...) + let target = args.windows(2).find(|w| &*w[0] == "--target").and_then(|w| w[1].to_str()); + let version = args.iter().find(|w| &**w == "-vV"); + + let verbose = match env::var("RUSTC_VERBOSE") { + Ok(s) => usize::from_str(&s).expect("RUSTC_VERBOSE should be an integer"), + Err(_) => 0, + }; + + // Use a different compiler for build scripts, since there may not yet be a + // libstd for the real compiler to use. However, if Cargo is attempting to + // determine the version of the compiler, the real compiler needs to be + // used. Currently, these two states are differentiated based on whether + // --target and -vV is/isn't passed. + let (rustc, libdir) = if target.is_none() && version.is_none() { + ("RUSTC_SNAPSHOT", "RUSTC_SNAPSHOT_LIBDIR") + } else { + ("RUSTC_REAL", "RUSTC_LIBDIR") + }; + let stage = env::var("RUSTC_STAGE").expect("RUSTC_STAGE was not set"); + let sysroot = env::var_os("RUSTC_SYSROOT").expect("RUSTC_SYSROOT was not set"); + let on_fail = env::var_os("RUSTC_ON_FAIL").map(Command::new); + + let rustc = env::var_os(rustc).unwrap_or_else(|| panic!("{:?} was not set", rustc)); + let libdir = env::var_os(libdir).unwrap_or_else(|| panic!("{:?} was not set", libdir)); + let mut dylib_path = dylib_path(); + dylib_path.insert(0, PathBuf::from(&libdir)); + + let mut cmd = Command::new(rustc); + cmd.args(&args).env(dylib_path_var(), env::join_paths(&dylib_path).unwrap()); + + // Get the name of the crate we're compiling, if any. + let crate_name = + args.windows(2).find(|args| args[0] == "--crate-name").and_then(|args| args[1].to_str()); + + if let Some(crate_name) = crate_name { + if let Some(target) = env::var_os("RUSTC_TIME") { + if target == "all" + || target.into_string().unwrap().split(',').any(|c| c.trim() == crate_name) + { + cmd.arg("-Ztime"); + } + } + } + + // Print backtrace in case of ICE + if env::var("RUSTC_BACKTRACE_ON_ICE").is_ok() && env::var("RUST_BACKTRACE").is_err() { + cmd.env("RUST_BACKTRACE", "1"); + } + + if let Ok(lint_flags) = env::var("RUSTC_LINT_FLAGS") { + cmd.args(lint_flags.split_whitespace()); + } + + if target.is_some() { + // The stage0 compiler has a special sysroot distinct from what we + // actually downloaded, so we just always pass the `--sysroot` option, + // unless one is already set. + if !args.iter().any(|arg| arg == "--sysroot") { + cmd.arg("--sysroot").arg(&sysroot); + } + + // If we're compiling specifically the `panic_abort` crate then we pass + // the `-C panic=abort` option. Note that we do not do this for any + // other crate intentionally as this is the only crate for now that we + // ship with panic=abort. + // + // This... is a bit of a hack how we detect this. Ideally this + // information should be encoded in the crate I guess? Would likely + // require an RFC amendment to RFC 1513, however. + // + // `compiler_builtins` are unconditionally compiled with panic=abort to + // workaround undefined references to `rust_eh_unwind_resume` generated + // otherwise, see issue https://github.com/rust-lang/rust/issues/43095. + if crate_name == Some("panic_abort") + || crate_name == Some("compiler_builtins") && stage != "0" + { + cmd.arg("-C").arg("panic=abort"); + } + } else { + // FIXME(rust-lang/cargo#5754) we shouldn't be using special env vars + // here, but rather Cargo should know what flags to pass rustc itself. + + // Override linker if necessary. + if let Ok(host_linker) = env::var("RUSTC_HOST_LINKER") { + cmd.arg(format!("-Clinker={}", host_linker)); + } + if env::var_os("RUSTC_HOST_FUSE_LD_LLD").is_some() { + cmd.arg("-Clink-args=-fuse-ld=lld"); + } + + if let Ok(s) = env::var("RUSTC_HOST_CRT_STATIC") { + if s == "true" { + cmd.arg("-C").arg("target-feature=+crt-static"); + } + if s == "false" { + cmd.arg("-C").arg("target-feature=-crt-static"); + } + } + + // Cargo doesn't pass RUSTFLAGS to proc_macros: + // https://github.com/rust-lang/cargo/issues/4423 + // Thus, if we are on stage 0, we explicitly set `--cfg=bootstrap`. + // We also declare that the flag is expected, which is mainly needed for + // later stages so that they don't warn about #[cfg(bootstrap)], + // but enabling it for stage 0 too lets any warnings, if they occur, + // occur more early on, e.g. about #[cfg(bootstrap = "foo")]. + if stage == "0" { + cmd.arg("--cfg=bootstrap"); + } + cmd.arg("-Zunstable-options"); + cmd.arg("--check-cfg=values(bootstrap)"); + } + + if let Ok(map) = env::var("RUSTC_DEBUGINFO_MAP") { + cmd.arg("--remap-path-prefix").arg(&map); + } + + // Force all crates compiled by this compiler to (a) be unstable and (b) + // allow the `rustc_private` feature to link to other unstable crates + // also in the sysroot. We also do this for host crates, since those + // may be proc macros, in which case we might ship them. + if env::var_os("RUSTC_FORCE_UNSTABLE").is_some() && (stage != "0" || target.is_some()) { + cmd.arg("-Z").arg("force-unstable-if-unmarked"); + } + + if let Ok(flags) = env::var("MAGIC_EXTRA_RUSTFLAGS") { + for flag in flags.split(' ') { + cmd.arg(flag); + } + } + + let is_test = args.iter().any(|a| a == "--test"); + if verbose > 2 { + let rust_env_vars = + env::vars().filter(|(k, _)| k.starts_with("RUST") || k.starts_with("CARGO")); + let prefix = if is_test { "[RUSTC-SHIM] rustc --test" } else { "[RUSTC-SHIM] rustc" }; + let prefix = match crate_name { + Some(crate_name) => format!("{} {}", prefix, crate_name), + None => prefix.to_string(), + }; + for (i, (k, v)) in rust_env_vars.enumerate() { + eprintln!("{} env[{}]: {:?}={:?}", prefix, i, k, v); + } + eprintln!("{} working directory: {}", prefix, env::current_dir().unwrap().display()); + eprintln!( + "{} command: {:?}={:?} {:?}", + prefix, + dylib_path_var(), + env::join_paths(&dylib_path).unwrap(), + cmd, + ); + eprintln!("{} sysroot: {:?}", prefix, sysroot); + eprintln!("{} libdir: {:?}", prefix, libdir); + } + + let start = Instant::now(); + let (child, status) = { + let errmsg = format!("\nFailed to run:\n{:?}\n-------------", cmd); + let mut child = cmd.spawn().expect(&errmsg); + let status = child.wait().expect(&errmsg); + (child, status) + }; + + if env::var_os("RUSTC_PRINT_STEP_TIMINGS").is_some() + || env::var_os("RUSTC_PRINT_STEP_RUSAGE").is_some() + { + if let Some(crate_name) = crate_name { + let dur = start.elapsed(); + // If the user requested resource usage data, then + // include that in addition to the timing output. + let rusage_data = + env::var_os("RUSTC_PRINT_STEP_RUSAGE").and_then(|_| format_rusage_data(child)); + eprintln!( + "[RUSTC-TIMING] {} test:{} {}.{:03}{}{}", + crate_name, + is_test, + dur.as_secs(), + dur.subsec_millis(), + if rusage_data.is_some() { " " } else { "" }, + rusage_data.unwrap_or(String::new()), + ); + } + } + + if status.success() { + std::process::exit(0); + // note: everything below here is unreachable. do not put code that + // should run on success, after this block. + } + if verbose > 0 { + println!("\nDid not run successfully: {}\n{:?}\n-------------", status, cmd); + } + + if let Some(mut on_fail) = on_fail { + on_fail.status().expect("Could not run the on_fail command"); + } + + // Preserve the exit code. In case of signal, exit with 0xfe since it's + // awkward to preserve this status in a cross-platform way. + match status.code() { + Some(i) => std::process::exit(i), + None => { + eprintln!("rustc exited with {}", status); + std::process::exit(0xfe); + } + } +} + +#[cfg(all(not(unix), not(windows)))] +// In the future we can add this for more platforms +fn format_rusage_data(_child: Child) -> Option<String> { + None +} + +#[cfg(windows)] +fn format_rusage_data(child: Child) -> Option<String> { + use std::os::windows::io::AsRawHandle; + use winapi::um::{processthreadsapi, psapi, timezoneapi}; + let handle = child.as_raw_handle(); + macro_rules! try_bool { + ($e:expr) => { + if $e != 1 { + return None; + } + }; + } + + let mut user_filetime = Default::default(); + let mut user_time = Default::default(); + let mut kernel_filetime = Default::default(); + let mut kernel_time = Default::default(); + let mut memory_counters = psapi::PROCESS_MEMORY_COUNTERS::default(); + + unsafe { + try_bool!(processthreadsapi::GetProcessTimes( + handle, + &mut Default::default(), + &mut Default::default(), + &mut kernel_filetime, + &mut user_filetime, + )); + try_bool!(timezoneapi::FileTimeToSystemTime(&user_filetime, &mut user_time)); + try_bool!(timezoneapi::FileTimeToSystemTime(&kernel_filetime, &mut kernel_time)); + + // Unlike on Linux with RUSAGE_CHILDREN, this will only return memory information for the process + // with the given handle and none of that process's children. + try_bool!(psapi::GetProcessMemoryInfo( + handle as _, + &mut memory_counters as *mut _ as _, + std::mem::size_of::<psapi::PROCESS_MEMORY_COUNTERS_EX>() as u32, + )); + } + + // Guide on interpreting these numbers: + // https://docs.microsoft.com/en-us/windows/win32/psapi/process-memory-usage-information + let peak_working_set = memory_counters.PeakWorkingSetSize / 1024; + let peak_page_file = memory_counters.PeakPagefileUsage / 1024; + let peak_paged_pool = memory_counters.QuotaPeakPagedPoolUsage / 1024; + let peak_nonpaged_pool = memory_counters.QuotaPeakNonPagedPoolUsage / 1024; + Some(format!( + "user: {USER_SEC}.{USER_USEC:03} \ + sys: {SYS_SEC}.{SYS_USEC:03} \ + peak working set (kb): {PEAK_WORKING_SET} \ + peak page file usage (kb): {PEAK_PAGE_FILE} \ + peak paged pool usage (kb): {PEAK_PAGED_POOL} \ + peak non-paged pool usage (kb): {PEAK_NONPAGED_POOL} \ + page faults: {PAGE_FAULTS}", + USER_SEC = user_time.wSecond + (user_time.wMinute * 60), + USER_USEC = user_time.wMilliseconds, + SYS_SEC = kernel_time.wSecond + (kernel_time.wMinute * 60), + SYS_USEC = kernel_time.wMilliseconds, + PEAK_WORKING_SET = peak_working_set, + PEAK_PAGE_FILE = peak_page_file, + PEAK_PAGED_POOL = peak_paged_pool, + PEAK_NONPAGED_POOL = peak_nonpaged_pool, + PAGE_FAULTS = memory_counters.PageFaultCount, + )) +} + +#[cfg(unix)] +/// Tries to build a string with human readable data for several of the rusage +/// fields. Note that we are focusing mainly on data that we believe to be +/// supplied on Linux (the `rusage` struct has other fields in it but they are +/// currently unsupported by Linux). +fn format_rusage_data(_child: Child) -> Option<String> { + let rusage: libc::rusage = unsafe { + let mut recv = std::mem::zeroed(); + // -1 is RUSAGE_CHILDREN, which means to get the rusage for all children + // (and grandchildren, etc) processes that have respectively terminated + // and been waited for. + let retval = libc::getrusage(-1, &mut recv); + if retval != 0 { + return None; + } + recv + }; + // Mac OS X reports the maxrss in bytes, not kb. + let divisor = if env::consts::OS == "macos" { 1024 } else { 1 }; + let maxrss = (rusage.ru_maxrss + (divisor - 1)) / divisor; + + let mut init_str = format!( + "user: {USER_SEC}.{USER_USEC:03} \ + sys: {SYS_SEC}.{SYS_USEC:03} \ + max rss (kb): {MAXRSS}", + USER_SEC = rusage.ru_utime.tv_sec, + USER_USEC = rusage.ru_utime.tv_usec, + SYS_SEC = rusage.ru_stime.tv_sec, + SYS_USEC = rusage.ru_stime.tv_usec, + MAXRSS = maxrss + ); + + // The remaining rusage stats vary in platform support. So we treat + // uniformly zero values in each category as "not worth printing", since it + // either means no events of that type occurred, or that the platform + // does not support it. + + let minflt = rusage.ru_minflt; + let majflt = rusage.ru_majflt; + if minflt != 0 || majflt != 0 { + init_str.push_str(&format!(" page reclaims: {} page faults: {}", minflt, majflt)); + } + + let inblock = rusage.ru_inblock; + let oublock = rusage.ru_oublock; + if inblock != 0 || oublock != 0 { + init_str.push_str(&format!(" fs block inputs: {} fs block outputs: {}", inblock, oublock)); + } + + let nvcsw = rusage.ru_nvcsw; + let nivcsw = rusage.ru_nivcsw; + if nvcsw != 0 || nivcsw != 0 { + init_str.push_str(&format!( + " voluntary ctxt switches: {} involuntary ctxt switches: {}", + nvcsw, nivcsw + )); + } + + return Some(init_str); +} diff --git a/src/bootstrap/bin/rustdoc.rs b/src/bootstrap/bin/rustdoc.rs new file mode 100644 index 000000000..87c1d22e7 --- /dev/null +++ b/src/bootstrap/bin/rustdoc.rs @@ -0,0 +1,81 @@ +//! Shim which is passed to Cargo as "rustdoc" when running the bootstrap. +//! +//! See comments in `src/bootstrap/rustc.rs` for more information. + +use std::env; +use std::ffi::OsString; +use std::path::PathBuf; +use std::process::Command; + +include!("../dylib_util.rs"); + +fn main() { + let args = env::args_os().skip(1).collect::<Vec<_>>(); + let rustdoc = env::var_os("RUSTDOC_REAL").expect("RUSTDOC_REAL was not set"); + let libdir = env::var_os("RUSTDOC_LIBDIR").expect("RUSTDOC_LIBDIR was not set"); + let sysroot = env::var_os("RUSTC_SYSROOT").expect("RUSTC_SYSROOT was not set"); + + // Detect whether or not we're a build script depending on whether --target + // is passed (a bit janky...) + let target = args.windows(2).find(|w| &*w[0] == "--target").and_then(|w| w[1].to_str()); + + use std::str::FromStr; + + let verbose = match env::var("RUSTC_VERBOSE") { + Ok(s) => usize::from_str(&s).expect("RUSTC_VERBOSE should be an integer"), + Err(_) => 0, + }; + + let mut dylib_path = dylib_path(); + dylib_path.insert(0, PathBuf::from(libdir.clone())); + + let mut cmd = Command::new(rustdoc); + + if target.is_some() { + // The stage0 compiler has a special sysroot distinct from what we + // actually downloaded, so we just always pass the `--sysroot` option, + // unless one is already set. + if !args.iter().any(|arg| arg == "--sysroot") { + cmd.arg("--sysroot").arg(&sysroot); + } + } + + cmd.args(&args); + cmd.env(dylib_path_var(), env::join_paths(&dylib_path).unwrap()); + + // Force all crates compiled by this compiler to (a) be unstable and (b) + // allow the `rustc_private` feature to link to other unstable crates + // also in the sysroot. + if env::var_os("RUSTC_FORCE_UNSTABLE").is_some() { + cmd.arg("-Z").arg("force-unstable-if-unmarked"); + } + if let Some(linker) = env::var_os("RUSTDOC_LINKER") { + let mut arg = OsString::from("-Clinker="); + arg.push(&linker); + cmd.arg(arg); + } + if env::var_os("RUSTDOC_FUSE_LD_LLD").is_some() { + cmd.arg("-Clink-arg=-fuse-ld=lld"); + if cfg!(windows) { + cmd.arg("-Clink-arg=-Wl,/threads:1"); + } else { + cmd.arg("-Clink-arg=-Wl,--threads=1"); + } + } + + if verbose > 1 { + eprintln!( + "rustdoc command: {:?}={:?} {:?}", + dylib_path_var(), + env::join_paths(&dylib_path).unwrap(), + cmd, + ); + eprintln!("sysroot: {:?}", sysroot); + eprintln!("libdir: {:?}", libdir); + } + + std::process::exit(match cmd.status() { + Ok(s) => s.code().unwrap_or(1), + Err(e) => panic!("\n\nfailed to run {:?}: {}\n\n", cmd, e), + }) +} diff --git a/src/bootstrap/bin/sccache-plus-cl.rs b/src/bootstrap/bin/sccache-plus-cl.rs new file mode 100644 index 000000000..554c2dd4d --- /dev/null +++ b/src/bootstrap/bin/sccache-plus-cl.rs @@ -0,0 +1,38 @@ +use std::env; +use std::process::{self, Command}; + +fn main() { + let target = env::var("SCCACHE_TARGET").unwrap(); + // Locate the actual compiler that we're invoking + env::set_var("CC", env::var_os("SCCACHE_CC").unwrap()); + env::set_var("CXX", env::var_os("SCCACHE_CXX").unwrap()); + let mut cfg = cc::Build::new(); + cfg.cargo_metadata(false) + .out_dir("/") + .target(&target) + .host(&target) + .opt_level(0) + .warnings(false) + .debug(false); + let compiler = cfg.get_compiler(); + + // Invoke sccache with said compiler + let sccache_path = env::var_os("SCCACHE_PATH").unwrap(); + let mut cmd = Command::new(&sccache_path); + cmd.arg(compiler.path()); + for &(ref k, ref v) in compiler.env() { + cmd.env(k, v); + } + for arg in env::args().skip(1) { + cmd.arg(arg); + } + + if let Ok(s) = env::var("SCCACHE_EXTRA_ARGS") { + for s in s.split_whitespace() { + cmd.arg(s); + } + } + + let status = cmd.status().expect("failed to spawn"); + process::exit(status.code().unwrap_or(2)) +} |