Migrate to Mac OS Lion

Hi,

	Sorry to bother you.
	I have some problem when migrate our app from Snow Leopard to Lion, and I find some linked-in drivers can't
be loaded by erl_ddll:load_driver/2 when I start VM with smp enabled. The VM crashed with following dump info:

(gdb) up
#1  0x000000001c0c77c1 in erts_sys_main_thread () at sys.c:2905
2905		res = select(erts_darwin_main_thread_pipe[0] + 1, &readfds, NULL, NULL, NULL);
(gdb) up
#2  0x000000001bfe5bc4 in erl_start (argc=12, argv=0x7fff6bbcb5a8)
   at erl_init.c:1483
1483	    erts_sys_main_thread(); /* May or may not return! */
(gdb) up
#3  0x6c61636f6c2f7273 in ?? ()
(gdb) 

	I happened to notice that the release of yaws 1.92 mentioned you had made some changes for building yaws on
Lion, but I can't find those changes from the commits on Github.  I was wondering if there is some common
problem when migrate erlang app to Lion and what you've done for the migration.

	Thanks for your help.

BR

Xu Cao
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