cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wchar/open_wmemstream.c -o wchar/open_wmemstream -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt 
relibc getrlimit(3, 0x7ffffffffc80): not implemented
relibc getrlimit(3, 0x7ffffffffbb0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
relibc getrlimit(9, 0x7ffffffffba0): not implemented
relibc getrlimit(5, 0x7ffffffffba0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
wchar/open_wmemstream.c:5:38: error: 'open_wmemstream' undeclared here (not in a function)
    5 | FILE *(*foo)(wchar_t **, size_t *) = open_wmemstream;
      |                                      ^~~~~~~~~~~~~~~