libstdc++-v3/ChangeLog:
PR libstdc++/125450
* include/std/optional (range_format): Do not define for
freestanding.
---
Tested x86_64-linux (also with -ffreestanding).
Pushed to trunk. Backport to gcc-16 to follow.
libstdc++-v3/include/std/optional | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/optional
b/libstdc++-v3/include/std/optional
index 8d6d049e8ccc..dec1a50413ab 100644
--- a/libstdc++-v3/include/std/optional
+++ b/libstdc++-v3/include/std/optional
@@ -60,7 +60,9 @@
# include <concepts>
#endif
#ifdef __cpp_lib_optional_range_support // C++ >= 26
-# include <bits/formatfwd.h>
+# if _GLIBCXX_HOSTED
+# include <bits/formatfwd.h>
+# endif
# include <bits/ranges_base.h>
# include <bits/range_access.h>
#endif
@@ -2285,9 +2287,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
ranges::enable_borrowed_range<optional<_Tp&>> = true;
#endif
+#if _GLIBCXX_HOSTED
template<typename _Tp>
inline constexpr range_format
format_kind<optional<_Tp>> = range_format::disabled;
+#endif
#endif // __cpp_lib_optional_range_support
#undef _GLIBCXX_USE_CONSTRAINTS_FOR_OPTIONAL
--
2.54.0
