sem_open

[Stuart Henderson]

graphics/ilmbase hangs during autoconf; it runs something close to this

#include <semaphore.h>
int
main()
{
        sem_t   mysem;

        if (sem_init(&mysem, 1, 1) == 0) {
                if (sem_wait(&mysem) == 0) {
                        sem_post(&mysem);
                        sem_destroy(&mysem);
                }
        }
}