/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/struct-winsize-ws_col.c -o termios/struct-winsize-ws_col -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
termios/struct-winsize-ws_col.c:2:17: error: declaration of 'struct winsize' will not be visible outside of this function [-Werror,-Wvisibility]
void foo(struct winsize* bar)
                ^
termios/struct-winsize-ws_col.c:4:28: error: incomplete definition of type 'struct winsize'
        unsigned short *qux = &bar->ws_col;
                               ~~~^
termios/struct-winsize-ws_col.c:2:17: note: forward declaration of 'struct winsize'
void foo(struct winsize* bar)
                ^
2 errors generated.