cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration termios/tcsetwinsize.c -o termios/tcsetwinsize -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lcrypt -latomic
termios/tcsetwinsize.c: In function ‘main’:
termios/tcsetwinsize.c:41:22: error: implicit declaration of function ‘tcsetwinsize’ [-Wimplicit-function-declaration]
   41 |                 if ( tcsetwinsize(pty, &ws) < 0 )
      |                      ^~~~~~~~~~~~