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Diffstat (limited to 'libstdc++-v3/include/std/numbers')
-rw-r--r--libstdc++-v3/include/std/numbers8
1 files changed, 5 insertions, 3 deletions
diff --git a/libstdc++-v3/include/std/numbers b/libstdc++-v3/include/std/numbers
index d7d9e81..ee717cc 100644
--- a/libstdc++-v3/include/std/numbers
+++ b/libstdc++-v3/include/std/numbers
@@ -31,7 +31,10 @@
#pragma GCC system_header
-#if __cplusplus > 201703L
+#define __glibcxx_want_math_constants
+#include <bits/version.h>
+
+#ifdef __cpp_lib_math_constants // C++ >= 20
#include <type_traits>
@@ -47,7 +50,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// Namespace for mathematical constants
namespace numbers
{
-#define __cpp_lib_math_constants 201907L
/// @cond undocumented
template<typename _Tp>
@@ -230,5 +232,5 @@ __glibcxx_numbers (__float128, Q);
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
-#endif // C++20
+#endif // __cpp_lib_math_constants
#endif // _GLIBCXX_NUMBERS