[libc++] Add explicit ABI annotations to functions from the block runtime declared in <__functional/function.h>

[philnik777]

No description provided.

[medismailben]

@philnik777 #131156 (comment)

I think all the stage1 tests have passed. Can we land this ?

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Nikolas Klauser (philnik777)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/140592.diff

1 Files Affected:

• (modified) libcxx/include/__functional/function.h (+4-2)

diff --git a/libcxx/include/__functional/function.h b/libcxx/include/__functional/function.h
index 5264af30d60d9..d9f857ae24cef 100644
--- a/libcxx/include/__functional/function.h
+++ b/libcxx/include/__functional/function.h
@@ -752,8 +752,9 @@ class __policy_func<_Rp(_ArgTypes...)> {
 
 #  if _LIBCPP_HAS_BLOCKS_RUNTIME
 
-extern "C" void* _Block_copy(const void*);
-extern "C" void _Block_release(const void*);
+_LIBCPP_BEGIN_EXPLICIT_ABI_ANNOTATIONS
+_LIBCPP_EXPORTED_FROM_ABI extern "C" void* _Block_copy(const void*);
+_LIBCPP_EXPORTED_FROM_ABI extern "C" void _Block_release(const void*);
 
 template <class _Rp1, class... _ArgTypes1, class _Alloc, class _Rp, class... _ArgTypes>
 class __func<_Rp1 (^)(_ArgTypes1...), _Alloc, _Rp(_ArgTypes...)> : public __base<_Rp(_ArgTypes...)> {
@@ -826,6 +827,7 @@ class __func<_Rp1 (^)(_ArgTypes1...), _Alloc, _Rp(_ArgTypes...)> : public __base
   }
 #    endif // _LIBCPP_HAS_RTTI
 };
+_LIBCPP_END_EXPLICIT_ABI_ANNOTATIONS
 
 #  endif // _LIBCPP_HAS_EXTENSION_BLOCKS