cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/tcgetwinsize.c -o termios/tcgetwinsize -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
termios/tcgetwinsize.c:5:24: error: declaration of 'struct winsize' will not be visible outside of this function [-Werror,-Wvisibility]
int (*foo)(int, struct winsize *) = tcgetwinsize;
                       ^
termios/tcgetwinsize.c:5:37: error: use of undeclared identifier 'tcgetwinsize'
int (*foo)(int, struct winsize *) = tcgetwinsize;
                                    ^
2 errors generated.