cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/tcsetwinsize.c -o termios/tcsetwinsize -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
termios/tcsetwinsize.c:5:30: error: declaration of 'struct winsize' will not be visible outside of this function [-Werror,-Wvisibility]
int (*foo)(int, const struct winsize *) = tcsetwinsize;
                             ^
termios/tcsetwinsize.c:5:43: error: use of undeclared identifier 'tcsetwinsize'
int (*foo)(int, const struct winsize *) = tcsetwinsize;
                                          ^
2 errors generated.