cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration spawn/posix_spawn_file_actions_addchdir.c -o spawn/posix_spawn_file_actions_addchdir -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
spawn/posix_spawn_file_actions_addchdir.c: In function 'main':
spawn/posix_spawn_file_actions_addchdir.c:40:23: error: implicit declaration of function 'posix_spawn_file_actions_addchdir'; did you mean 'posix_spawn_file_actions_addchdir_np'? [-Werror=implicit-function-declaration]
   40 |         if ( (errno = posix_spawn_file_actions_addchdir(&actions, "spawn")) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawn_file_actions_addchdir_np
cc1: some warnings being treated as errors