On Jan 16, 2013, at 5:21 PM, <Paul_Koning at Dell.com> wrote: On Jan 16, 2013, at 3:17 PM, Cory Smelosky wrote: On 15 Jan 2013, at 20:25, Jordi Guillaumes i Pons <jg at jordi.guillaumes.name> wrote: El 15/01/2013, a les 20:27, Paul_Koning at Dell.com va escriure: When I build it with the default build settings (async I/O enabled) both PDP11 and VAX hang at boot. Built with NOASYNCH and it runs fine. I haven't tried other platforms. I have. Mark is working on the hang issues. He has fixed some of the bugs, but that asynch code seems to be specially hard to debug. BTW it is a multicore-multiprocessor issue also observed in other operating systems. I'm curious if anyone else has tried it, or has ideas of what's wrong here. When it gets in this state, I have to kill the process; it won't answer interrupts or even SIGTERM. I run it with asynch disabled for the time being. When I try that, it fails to link. Undefined symbols for architecture x86_64: "_clock_gettime", referenced from: _todr_wr in ccGqWyaE.o _todr_resync in ccGqWyaE.o _todr_rd in ccGqWyaE.o ld: symbol(s) not found for architecture x86_64 I noticed that one. Find clock_gettime. It's currently conditional on two things one of which is async support. Take away that second check. paul I should have just looked it up first rather than answering from memory. Here is the fix: diff --git a/sim_timer.c b/sim_timer.c index 6044643..8c1e9e7 100644 --- a/sim_timer.c +++ b/sim_timer.c @@ -402,7 +402,7 @@ if (tim > SIM_IDLE_MAX) tim = 0; return tim; } -#if !defined(_POSIX_SOURCE) && defined(SIM_ASYNCH_IO) +#if !defined(_POSIX_SOURCE) #ifdef NEED_CLOCK_GETTIME typedef int clockid_t; int clock_gettime(clockid_t clk_id, struct timespec *tp) paul