cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations dirent/struct-posix_dent-d_name.c -o dirent/struct-posix_dent-d_name -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
dirent/struct-posix_dent-d_name.c:2:17: error: declaration of 'struct posix_dent' will not be visible outside of this function [-Werror,-Wvisibility]
void foo(struct posix_dent* bar)
                ^
dirent/struct-posix_dent-d_name.c:4:17: error: incomplete definition of type 'struct posix_dent'
        char *qux = bar->d_name;
                    ~~~^
dirent/struct-posix_dent-d_name.c:2:17: note: forward declaration of 'struct posix_dent'
void foo(struct posix_dent* bar)
                ^
2 errors generated.