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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
commit | ef24de24a82fe681581cc130f342363c47c0969a (patch) | |
tree | 0d494f7e1a38b95c92426f58fe6eaa877303a86c /vendor/io-lifetimes/build.rs | |
parent | Releasing progress-linux version 1.74.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-ef24de24a82fe681581cc130f342363c47c0969a.tar.xz rustc-ef24de24a82fe681581cc130f342363c47c0969a.zip |
Merging upstream version 1.75.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/io-lifetimes/build.rs')
-rw-r--r-- | vendor/io-lifetimes/build.rs | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/vendor/io-lifetimes/build.rs b/vendor/io-lifetimes/build.rs deleted file mode 100644 index 2fc2a3817..000000000 --- a/vendor/io-lifetimes/build.rs +++ /dev/null @@ -1,113 +0,0 @@ -use std::env::var; -use std::io::Write; - -fn main() { - // I/O safety is stabilized in Rust 1.63. - if has_io_safety() { - use_feature("io_safety_is_in_std") - } - - // Work around - // <https://github.com/rust-lang/rust/issues/103306>. - use_feature_or_nothing("wasi_ext"); - - // Rust 1.56 and earlier don't support panic in const fn. - if has_panic_in_const_fn() { - use_feature("panic_in_const_fn") - } - - // Don't rerun this on changes other than build.rs, as we only depend on - // the rustc version. - println!("cargo:rerun-if-changed=build.rs"); -} - -fn use_feature_or_nothing(feature: &str) { - if has_feature(feature) { - use_feature(feature); - } -} - -fn use_feature(feature: &str) { - println!("cargo:rustc-cfg={}", feature); -} - -/// Test whether the rustc at `var("RUSTC")` supports the given feature. -fn has_feature(feature: &str) -> bool { - can_compile(format!( - "#![allow(stable_features)]\n#![feature({})]", - feature - )) -} - -/// Test whether the rustc at `var("RUSTC")` can compile the given code. -fn can_compile<T: AsRef<str>>(test: T) -> bool { - use std::process::Stdio; - - let out_dir = var("OUT_DIR").unwrap(); - let rustc = var("RUSTC").unwrap(); - let target = var("TARGET").unwrap(); - - // Use `RUSTC_WRAPPER` if it's set, unless it's set to an empty string, - // as documented [here]. - // [here]: https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-reads - let wrapper = var("RUSTC_WRAPPER") - .ok() - .and_then(|w| if w.is_empty() { None } else { Some(w) }); - - let mut cmd = if let Some(wrapper) = wrapper { - let mut cmd = std::process::Command::new(wrapper); - // The wrapper's first argument is supposed to be the path to rustc. - cmd.arg(rustc); - cmd - } else { - std::process::Command::new(rustc) - }; - - cmd.arg("--crate-type=rlib") // Don't require `main`. - .arg("--emit=metadata") // Do as little as possible but still parse. - .arg("--target") - .arg(target) - .arg("--out-dir") - .arg(out_dir); // Put the output somewhere inconsequential. - - // If Cargo wants to set RUSTFLAGS, use that. - if let Ok(rustflags) = var("CARGO_ENCODED_RUSTFLAGS") { - if !rustflags.is_empty() { - for arg in rustflags.split('\x1f') { - cmd.arg(arg); - } - } - } - - let mut child = cmd - .arg("-") // Read from stdin. - .stdin(Stdio::piped()) // Stdin is a pipe. - .stderr(Stdio::null()) // Errors from feature detection aren't interesting and can be confusing. - .spawn() - .unwrap(); - - writeln!(child.stdin.take().unwrap(), "{}", test.as_ref()).unwrap(); - - child.wait().unwrap().success() -} - -/// Test whether the rustc at `var("RUSTC")` supports panic in `const fn`. -fn has_panic_in_const_fn() -> bool { - can_compile("const fn foo() {{ panic!() }}") -} - -/// Test whether the rustc at `var("RUSTC")` supports the I/O safety feature. -fn has_io_safety() -> bool { - can_compile( - "\ - #[cfg(unix)]\n\ - use std::os::unix::io::OwnedFd as Owned;\n\ - #[cfg(target_os = \"wasi\")]\n\ - use std::os::wasi::io::OwnedFd as Owned;\n\ - #[cfg(windows)]\n\ - use std::os::windows::io::OwnedHandle as Owned;\n\ - \n\ - pub type Success = Owned;\n\ - ", - ) -} |