squiid/rust
1
0
Fork 0
Code Issues Pull requests Projects Activity

Rollup merge of #91870 - rusticstuff:macosx_min_version_revert, r=Mark-Simulacrum

Browse source 
Revert setting a default for the MACOSX_DEPLOYMENT_TARGET env var for linking

This reverts commit b376f5621b, which is the main part of #90499, because it turns out that this causes a good amount of breakage in crates relying on the old behavior. In particular `winit`, `coreaudio` and crates that depend on them are affected. Fixes #91372.

Background:
Before #90499 the behavior was the following: If MACOSX_DEPLOYMENT_TARGET is not set,  we pass the minimum supported OS version to LLVM but not to the linker. The linker default depends on the Xcode version and the version of the OS it is running on. That caused one known problem in libcurl with the most recent Xcode versions. #90499 passed the minumum supported version (10.7 for Macos x86-64) to the linker instead. This has shown to be problematic because some crates such as winit, coreaudio implicitly expect a newer minimum OS version. The libcurl issue has been fixed independently (see https://github.com/alexcrichton/curl-rust/issues/417), so a revert should not really be problematic.

Eventually we should probably mimic clang's behavior and fall back to the default of the currently configured Macos SDK for both the LLVM min os target version and MACOSX_DEPLOYMENT_TARGET for linking. That would entail looking at the `Version` property of the `SDKSettings.json` in the currently configured SDK.
This commit is contained in:
Matthias Krüger 2021-12-15 01:28:07 +01:00 committed by GitHub
commit 2f270e47c6
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 0 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
compiler/rustc_target/src/spec/aarch64_apple_darwin.rs
View file

@ -9,7 +9,6 @@ pub fn target() -> Target {
base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::CFI | SanitizerSet::THREAD;
base.pre_link_args.insert(LinkerFlavor::Gcc, vec!["-arch".to_string(), "arm64".to_string()]);
base.link_env.extend(super::apple_base::macos_link_env("arm64"));
base.link_env_remove.extend(super::apple_base::macos_link_env_remove());
// Clang automatically chooses a more specific target based on

12
compiler/rustc_target/src/spec/apple_base.rs
View file

@ -79,18 +79,6 @@ pub fn macos_llvm_target(arch: &str) -> String {
format!("{}-apple-macosx{}.{}.0", arch, major, minor)
}
pub fn macos_link_env(arch: &str) -> Vec<(String, String)> {
// Use the default deployment target for linking just as with the LLVM target if not
// specified via MACOSX_DEPLOYMENT_TARGET, otherwise the system linker would use its
// default which varies with Xcode version.
if env::var("MACOSX_DEPLOYMENT_TARGET").is_err() {
let default = macos_default_deployment_target(arch);
vec![("MACOSX_DEPLOYMENT_TARGET".to_string(), format!("{}.{}", default.0, default.1))]
} else {
vec![]
}
}
pub fn macos_link_env_remove() -> Vec<String> {
let mut env_remove = Vec::with_capacity(2);
// Remove the `SDKROOT` environment variable if it's clearly set for the wrong platform, which

1
compiler/rustc_target/src/spec/i686_apple_darwin.rs
View file

@ -5,7 +5,6 @@ pub fn target() -> Target {
base.cpu = "yonah".to_string();
base.max_atomic_width = Some(64);
base.pre_link_args.insert(LinkerFlavor::Gcc, vec!["-m32".to_string()]);
base.link_env.extend(super::apple_base::macos_link_env("i686"));
base.link_env_remove.extend(super::apple_base::macos_link_env_remove());
// don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
base.stack_probes = StackProbeType::Call;

1
compiler/rustc_target/src/spec/x86_64_apple_darwin.rs
View file

@ -10,7 +10,6 @@ pub fn target() -> Target {
LinkerFlavor::Gcc,
vec!["-m64".to_string(), "-arch".to_string(), "x86_64".to_string()],
);
base.link_env.extend(super::apple_base::macos_link_env("x86_64"));
base.link_env_remove.extend(super::apple_base::macos_link_env_remove());
// don't use probe-stack=inline-asm until rust#83139 and rust#84667 are resolved
base.stack_probes = StackProbeType::Call;