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Explain why MACOSX_STD_DEPLOYMENT_TARGET exist

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This commit is contained in:
Mads Marquart 2024-11-25 08:00:22 +01:00
parent 9318fbb33a
commit 0a3fd1f062
1 changed files with 9 additions and 1 deletions
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10
src/bootstrap/src/core/build_steps/compile.rs
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@ -474,7 +474,15 @@ pub fn std_cargo(builder: &Builder<'_>, target: TargetSelection, stage: u32, car
// already, rustc should've picked that up).
cargo.env(env_var.trim(), value.trim());
// Allow CI to override the deployment target for `std`.
// Allow CI to override the deployment target for `std` on macOS.
//
// This is useful because we might want the host tooling LLVM, `rustc`
// and Cargo to have a different deployment target than `std` itself
// (currently, these two versions are the same, but in the past, we
// supported macOS 10.7 for user code and macOS 10.8 in host tooling).
//
// It is not necessary on the other platforms, since only macOS has
// support for host tooling.
if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
}