In file included from /nix/store/lm7bpsys535kxfljlkpw23l9k3rvbsgl-cxx-main.cc:1:
In file included from /nix/store/0hfqkfzq503hhxmh0rqjaym23pyhlfcn-libc++-4.0.1/include/c++/v1/iostream:38:
In file included from /nix/store/0hfqkfzq503hhxmh0rqjaym23pyhlfcn-libc++-4.0.1/include/c++/v1/ios:215:
In file included from /nix/store/0hfqkfzq503hhxmh0rqjaym23pyhlfcn-libc++-4.0.1/include/c++/v1/iosfwd:90:
/nix/store/0hfqkfzq503hhxmh0rqjaym23pyhlfcn-libc++-4.0.1/include/c++/v1/wchar.h:133:77: error: use of undeclared identifier 'wcschr'
wchar_t* __libcpp_wcschr(const wchar_t* __s, wchar_t __c) {return (wchar_t*)wcschr(__s, __c);}
                                                                            ^
...
/nix/store/0hfqkfzq503hhxmh0rqjaym23pyhlfcn-libc++-4.0.1/include/c++/v1/string.h:78:13: note: candidate disabled: <no message provided>
      char* strchr(      char* __s, int __c) {return __libcpp_strchr(__s, __c);}
            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.