build on osx

src/iomux_epoll.c

@@ -1,9 +1,10 @@
+#ifdef __linux__
 #include <sys/epoll.h>
 #include <unistd.h>
 #include <stdlib.h>
-#include <errno.h>
 #include <string.h>
 #include <assert.h>
+#include <errno.h>
 #include "iomux_impl.h"
 
 //epoll (linux specific) IO mux.
@@ -230,3 +231,12 @@ int iomux_epoll_init(struct IOMux *mux)
     return 0;
 }
 
+#else
+#include <errno.h>
+#include "iomux_impl.h"
+
+int iomux_epoll_init(struct IOMux *mux)
+{
+    return ENOSYS;
+}
+#endif