cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_types/key_t.c -o sys_types/key_t -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
sys_types/key_t.c:8:1: error: unknown type name 'key_t'
    8 | key_t* foo;
      | ^~~~~