[libcxx-commits] [libcxx] 5d4281d - [libc++] Gives ignore external linkage.

[Mark de Wever via libcxx-commits]

Author: Mark de Wever
Date: 2023-05-31T17:22:52+02:00
New Revision: 5d4281d5493c7a2fc09d9ac9fc5b374676a4d8af

URL: https://github.com/llvm/llvm-project/commit/5d4281d5493c7a2fc09d9ac9fc5b374676a4d8af
DIFF: https://github.com/llvm/llvm-project/commit/5d4281d5493c7a2fc09d9ac9fc5b374676a4d8af.diff

LOG: [libc++] Gives ignore external linkage.

A slightly different fix is in D144994.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D151490

Added: 
    

Modified: 
    libcxx/include/tuple

Removed: 
    


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diff  --git a/libcxx/include/tuple b/libcxx/include/tuple
index fe7432f44310..e4119cf2ec02 100644
--- a/libcxx/include/tuple
+++ b/libcxx/include/tuple
@@ -1508,9 +1508,13 @@ struct __ignore_t
     const __ignore_t& operator=(_Tp&&) const {return *this;}
 };
 
+#  if _LIBCPP_STD_VER >= 17
+inline constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>();
+#  else
 namespace {
   constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>();
 } // namespace
+#  endif
 
 template <class... _Tp>
 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14