cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration unistd/linkat.c -o unistd/linkat -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
relibc getrlimit(3, 0x7ffffffffc80): not implemented
relibc getrlimit(3, 0x7ffffffffba0): not implemented
relibc getrlimit(9, 0x7ffffffffb60): not implemented
relibc getrlimit(9, 0x7ffffffffb90): not implemented
relibc getrlimit(5, 0x7ffffffffb90): not implemented
relibc getrlimit(9, 0x7ffffffffb60): not implemented
unistd/linkat.c: In function 'main':
unistd/linkat.c:48:22: error: implicit declaration of function 'openat'; did you mean 'open'? [-Werror=implicit-function-declaration]
   48 |         int src_fd = openat(tmpdir_fd, "a", O_WRONLY | O_CREAT, 0600);
      |                      ^~~~~~
      |                      open
unistd/linkat.c:55:14: error: implicit declaration of function 'linkat'; did you mean 'link'? [-Werror=implicit-function-declaration]
   55 |         if ( linkat(tmpdir_fd, "a", tmpdir_fd, "b", AT_SYMLINK_FOLLOW) < 0 )
      |              ^~~~~~
      |              link
unistd/linkat.c:55:53: error: 'AT_SYMLINK_FOLLOW' undeclared (first use in this function); did you mean 'AT_SYMLINK_NOFOLLOW'?
   55 |         if ( linkat(tmpdir_fd, "a", tmpdir_fd, "b", AT_SYMLINK_FOLLOW) < 0 )
      |                                                     ^~~~~~~~~~~~~~~~~
      |                                                     AT_SYMLINK_NOFOLLOW
unistd/linkat.c:55:53: note: each undeclared identifier is reported only once for each function it appears in
unistd/linkat.c:58:17: error: implicit declaration of function 'unlinkat'; did you mean 'unlink'? [-Werror=implicit-function-declaration]
   58 |                 unlinkat(tmpdir_fd, "a", 0);
      |                 ^~~~~~~~
      |                 unlink
cc1: some warnings being treated as errors