illumos gate

quota(1M) contains code like this:

                mntopt += strcspn(mntopt, "=");
                if (strncmp(++mntopt, my_zonename,
                     strcspn(mntopt, ",")) != 0)
                     continue;

GCC4 complains that the order of the operations on mntopt is undefined (whether it is incremented before or after it is passed to strcspn). It's easy to adjust this to equivalent code without the problem:

                mntopt += strcspn(mntopt, "=") + 1;
                if (strncmp(mntopt, my_zonename,
                     strcspn(mntopt, ",")) != 0)
                     continue;