From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 library/std/src/sys/unix/weak.rs | 53 +++-------------------------------------
 1 file changed, 4 insertions(+), 49 deletions(-)

(limited to 'library/std/src/sys/unix/weak.rs')

diff --git a/library/std/src/sys/unix/weak.rs b/library/std/src/sys/unix/weak.rs
index f5a4ce929..62ffee70b 100644
--- a/library/std/src/sys/unix/weak.rs
+++ b/library/std/src/sys/unix/weak.rs
@@ -1,9 +1,8 @@
 //! Support for "weak linkage" to symbols on Unix
 //!
-//! Some I/O operations we do in libstd require newer versions of OSes but we
-//! need to maintain binary compatibility with older releases for now. In order
-//! to use the new functionality when available we use this module for
-//! detection.
+//! Some I/O operations we do in std require newer versions of OSes but we need
+//! to maintain binary compatibility with older releases for now. In order to
+//! use the new functionality when available we use this module for detection.
 //!
 //! One option to use here is weak linkage, but that is unfortunately only
 //! really workable with ELF. Otherwise, use dlsym to get the symbol value at
@@ -29,7 +28,7 @@ use crate::ptr;
 use crate::sync::atomic::{self, AtomicPtr, Ordering};
 
 // We can use true weak linkage on ELF targets.
-#[cfg(all(not(any(target_os = "macos", target_os = "ios")), not(bootstrap)))]
+#[cfg(not(any(target_os = "macos", target_os = "ios")))]
 pub(crate) macro weak {
     (fn $name:ident($($t:ty),*) -> $ret:ty) => (
         let ref $name: ExternWeak<unsafe extern "C" fn($($t),*) -> $ret> = {
@@ -43,30 +42,14 @@ pub(crate) macro weak {
     )
 }
 
-#[cfg(all(not(any(target_os = "macos", target_os = "ios")), bootstrap))]
-pub(crate) macro weak {
-    (fn $name:ident($($t:ty),*) -> $ret:ty) => (
-        let ref $name: ExternWeak<unsafe extern "C" fn($($t),*) -> $ret> = {
-            extern "C" {
-                #[linkage = "extern_weak"]
-                static $name: *const libc::c_void;
-            }
-            #[allow(unused_unsafe)]
-            ExternWeak::new(unsafe { $name })
-        };
-    )
-}
-
 // On non-ELF targets, use the dlsym approximation of weak linkage.
 #[cfg(any(target_os = "macos", target_os = "ios"))]
 pub(crate) use self::dlsym as weak;
 
-#[cfg(not(bootstrap))]
 pub(crate) struct ExternWeak<F: Copy> {
     weak_ptr: Option<F>,
 }
 
-#[cfg(not(bootstrap))]
 impl<F: Copy> ExternWeak<F> {
     #[inline]
     pub(crate) fn new(weak_ptr: Option<F>) -> Self {
@@ -79,34 +62,6 @@ impl<F: Copy> ExternWeak<F> {
     }
 }
 
-#[cfg(bootstrap)]
-pub(crate) struct ExternWeak<F> {
-    weak_ptr: *const libc::c_void,
-    _marker: PhantomData<F>,
-}
-
-#[cfg(bootstrap)]
-impl<F> ExternWeak<F> {
-    #[inline]
-    pub(crate) fn new(weak_ptr: *const libc::c_void) -> Self {
-        ExternWeak { weak_ptr, _marker: PhantomData }
-    }
-}
-
-#[cfg(bootstrap)]
-impl<F> ExternWeak<F> {
-    #[inline]
-    pub(crate) fn get(&self) -> Option<F> {
-        unsafe {
-            if self.weak_ptr.is_null() {
-                None
-            } else {
-                Some(mem::transmute_copy::<*const libc::c_void, F>(&self.weak_ptr))
-            }
-        }
-    }
-}
-
 pub(crate) macro dlsym {
     (fn $name:ident($($t:ty),*) -> $ret:ty) => (
          dlsym!(fn $name($($t),*) -> $ret, stringify!($name));
-- 
cgit v1.2.3