cc -pipe -O   -pthread  -Wall -Wextra -Werror=implicit-function-declaration termios/tcgetwinsize.c -o termios/tcgetwinsize -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt  -lrt -lcrypt
termios/tcgetwinsize.c: In function 'main':
termios/tcgetwinsize.c:52:8: error: implicit declaration of function 'tcsetwinsize'; did you mean 'tcsetsid'? [-Werror=implicit-function-declaration]
   if ( tcsetwinsize(pty, &ws) < 0 )
        ^~~~~~~~~~~~
        tcsetsid
termios/tcgetwinsize.c:57:8: error: implicit declaration of function 'tcgetwinsize'; did you mean 'tcgetsid'? [-Werror=implicit-function-declaration]
   if ( tcgetwinsize(pty, &new_ws) < 0 )
        ^~~~~~~~~~~~
        tcgetsid
cc1: some warnings being treated as errors