Tested x86_64-linux, built (but not tested) on h8300-elf.
Pushed to trunk.
-- >8 --
If we don't have std::to_chars for floating-point types (either because
float and double are not IEEE format, or size_t is 16-bit) then we can't
use them with std::format. This causes a bootstrap failure since
std/c++20/tzdb.cc was added to the library, because <chrono> now
includes <format>.
This change just disables formatting support for those types. This is
not a proper fix, but solves the bootstrap failure for now.
libstdc++-v3/ChangeLog:
PR libstdc++/108221
* include/std/format (basic_format_arg) [!__cpp_lib_to_chars]:
Disable visiting floating-point types.
---
libstdc++-v3/include/std/format | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libstdc++-v3/include/std/format b/libstdc++-v3/include/std/format
index 98421e8c123..77f7c9fef3f 100644
--- a/libstdc++-v3/include/std/format
+++ b/libstdc++-v3/include/std/format
@@ -3034,6 +3034,7 @@ namespace __format
return std::forward<_Visitor>(__vis)(_M_val._M_ll);
case _Arg_ull:
return std::forward<_Visitor>(__vis)(_M_val._M_ull);
+#if __cpp_lib_to_chars // FIXME: need to be able to format these types!
case _Arg_flt:
return std::forward<_Visitor>(__vis)(_M_val._M_flt);
case _Arg_dbl:
@@ -3046,6 +3047,7 @@ namespace __format
return std::forward<_Visitor>(__vis)(_M_val._M_f128);
case _Arg_ibm128:
return std::forward<_Visitor>(__vis)(_M_val._M_ibm128);
+#endif
#endif
case _Arg_str:
return std::forward<_Visitor>(__vis)(_M_val._M_str);
--
2.39.0
