cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations time/struct-itimerspec-it_value.c -o time/struct-itimerspec-it_value -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
time/struct-itimerspec-it_value.c:2:17: error: declaration of 'struct itimerspec' will not be visible outside of this function [-Werror,-Wvisibility]
void foo(struct itimerspec* bar)
                ^
time/struct-itimerspec-it_value.c:4:29: error: incomplete definition of type 'struct itimerspec'
        struct timespec *qux = &bar->it_value;
                                ~~~^
time/struct-itimerspec-it_value.c:2:17: note: forward declaration of 'struct itimerspec'
void foo(struct itimerspec* bar)
                ^
2 errors generated.