use weak aliases rather than function pointers to simplify some code

[musl] / src / thread / pthread_join.c

#include "pthread_impl.h"

static void dummy(void *p)
{
}

int pthread_join(pthread_t t, void **res)
{
        int tmp = t->tid;
        if (tmp) __timedwait(&t->tid, tmp, 0, 0, dummy, 0, 1);
        if (res) *res = t->result;
        if (t->map_base) munmap(t->map_base, t->map_size);
        return 0;
}