Objects/mimalloc/random.c: In function ‘os_random_buf’:
Objects/mimalloc/random.c:215:19: error: implicit declaration of function ‘syscall’ [-Werror=implicit-function-declaration]
  215 |     ssize_t ret = syscall(SYS_getrandom, buf, buf_len, GRND_NONBLOCK);
      |                   ^~~~~~~
cc1: some warnings being treated as errors
make: *** [Makefile:1987: Objects/mimalloc/random.o] Error 1
make: *** Waiting for unfinished jobs....
Objects/mimalloc/alloc.c: In function ‘mi_heap_realpath’:
Objects/mimalloc/alloc.c:763:12: error: implicit declaration of function ‘realpath’; did you mean ‘mi_realpath’? [-Werror=implicit-function-declaration]
  763 |     return realpath(fname,resolved_name);
      |            ^~~~~~~~
      |            mi_realpath
Objects/mimalloc/alloc.c:763:12: warning: returning ‘int’ from a function with return type ‘char *’ makes pointer from integer without a cast [-Wint-conversion]
  763 |     return realpath(fname,resolved_name);
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/mimalloc/alloc.c:769:20: warning: initialization of ‘char *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  769 |     char* rname  = realpath(fname,buf);
      |                    ^~~~~~~~

       realpath():
           _XOPEN_SOURCE >= 500
               || /* Glibc since 2.19: */ _DEFAULT_SOURCE
               || /* Glibc <= 2.19: */ _BSD_SOURCE

       syscall():
           Since glibc 2.19:
               _DEFAULT_SOURCE
           Before glibc 2.19:
               _BSD_SOURCE || _SVID_SOURCE