cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_socket/struct-cmsghdr-cmsg_len.c -o sys_socket/struct-cmsghdr-cmsg_len -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
sys_socket/struct-cmsghdr-cmsg_len.c: In function ‘foo’:
sys_socket/struct-cmsghdr-cmsg_len.c:4:26: error: initialization of ‘socklen_t *’ {aka ‘unsigned int *’} from incompatible pointer type ‘size_t *’ {aka ‘long unsigned int *’} [-Wincompatible-pointer-types]
    4 |         socklen_t *qux = &bar->cmsg_len;
      |                          ^