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authorbors <bors@rust-lang.org>2021-07-10 21:42:40 +0000
committerbors <bors@rust-lang.org>2021-07-10 21:42:40 +0000
commitdfd7b8d03fb93d0e03147d28b3be6d93260fa94d (patch)
tree4a4310069f11ed4d0f2fdd3aadaf02fbc67a5fb3 /library/std/src/sys/unix/thread.rs
parent432e145bd5a974c5b6f4dd9b352891bd7502b69d (diff)
parent5999a5fbdc91ac07d4103095ed532d8cd4d3443b (diff)
downloadrust-dfd7b8d03fb93d0e03147d28b3be6d93260fa94d.tar.gz
rust-dfd7b8d03fb93d0e03147d28b3be6d93260fa94d.zip
Auto merge of #85953 - inquisitivecrystal:weak-linkat-in-fs-hardlink, r=joshtriplett
Fix linker error

Currently, `fs::hard_link` determines whether platforms have `linkat` based on the OS, and uses `link` if they don't. However, this heuristic does not work well if a platform provides `linkat` on newer versions but not on older ones. On old MacOS, this currently causes a linking error.

This commit fixes `fs::hard_link` by telling it to use `weak!` on macOS. This means that, on  that operating system, we now check for `linkat` at runtime and use `link` if it is not available.

Fixes #80804.

`@rustbot` label T-libs-impl
Diffstat (limited to 'library/std/src/sys/unix/thread.rs')
-rw-r--r--library/std/src/sys/unix/thread.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/library/std/src/sys/unix/thread.rs b/library/std/src/sys/unix/thread.rs
index df2ba0a8bc8..879d7160524 100644
--- a/library/std/src/sys/unix/thread.rs
+++ b/library/std/src/sys/unix/thread.rs
@@ -7,6 +7,8 @@ use crate::ptr;
 use crate::sys::{os, stack_overflow};
 use crate::time::Duration;
 
+#[cfg(any(target_os = "linux", target_os = "solaris", target_os = "illumos"))]
+use crate::sys::weak::weak;
 #[cfg(not(any(target_os = "l4re", target_os = "vxworks")))]
 pub const DEFAULT_MIN_STACK_SIZE: usize = 2 * 1024 * 1024;
 #[cfg(target_os = "l4re")]