libstdc++: Replace check for exceptions in mdspan/at.cc.

Uses __cpp_lib_constexpr_exceptions, that better expresses
the intent.

libstdc++-v3/ChangeLog:

	* testsuite/23_containers/mdspan/at.cc: Updated guard.

diff --git a/libstdc++-v3/testsuite/23_containers/mdspan/at.cc b/libstdc++-v3/testsuite/23_containers/mdspan/at.cc
index d9edce464add55930c524a565b2ada538d1f77bd..c5a12d12cccb827ee5a55f2152e197aae00c189e 100644 (file)
--- a/libstdc++-v3/testsuite/23_containers/mdspan/at.cc
+++ b/libstdc++-v3/testsuite/23_containers/mdspan/at.cc
@@ -89,7 +89,7 @@ template<typename Int, bool ValidForPacks, bool ValidForArrays>
       }
     };
 
-#if !_GLIBCXX_USE_CXX11_ABI
+#if !__cpp_lib_constexpr_exceptions
     if consteval {
       return true;
     }