https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118177
Bug ID: 118177 Summary: C++ Standard Module: ‘mbrtoc8’ has not been declared in ‘std’ Product: gcc Version: 15.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: huangqinjin at gmail dot com Target Milestone: --- g++ -std=c++23 -fmodules -fsearch-include-path bits/std.cc /opt/compiler-explorer/gcc-trunk-20241223/include/c++/15.0.0/bits/std.cc:3856:14: error: ‘mbrtoc8’ has not been declared in ‘std’ 3856 | using std::mbrtoc8; | ^~~~~~~ /opt/compiler-explorer/gcc-trunk-20241223/include/c++/15.0.0/bits/std.cc:3857:14: error: ‘c8rtomb’ has not been declared in ‘std’ 3857 | using std::c8rtomb; | ^~~~~~~