u8path<std::string> deprecation with libc++ and c++20 #24682
Description
When trying to compile with c++20 support (added in #24169) on macOS 12.3 on master I get inundated with the below warning.
./configure --enable-c++20 --enable-suppress-external-warnings
In file included from bitcoin-cli.cpp:19:
In file included from ./util/system.h:20:
./fs.h:71:29: warning: 'u8path<std::string>' is deprecated [-Wdeprecated-declarations]
return std::filesystem::u8path(utf8_str);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/filesystem:1570:27: note: 'u8path<std::string>' has been explicitly marked deprecated here
_LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/__config:1078:43: note: expanded from macro '_LIBCPP_DEPRECATED_WITH_CHAR8_T'
# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/__config:1043:48: note: expanded from macro '_LIBCPP_DEPRECATED'
# define _LIBCPP_DEPRECATED __attribute__ ((deprecated))
^
1 warning generated.