ok, after some clues from David I built a mostly broken unix vm,  
however it was enough to build a OSProcessPlugin as a side effect.

In testing I see that calling primitiveForkSqueakWithoutSigHandler
crashes things, I'll suspect forking the carbon vm is a no no.

clues are...

[

squeak: could not load plugin `XDisplayControlPlugin'
ioFindExternalFunctionIn(primitiveForkSqueakWithoutSigHandler, 4251344)
Switching to process 4134 thread 0x6977]
Program received signal:  "EXC_BAD_ACCESS".

(gdb) call (int) printAllStacks()
SmallInteger
149288092 ProcessorScheduler class>idleProcess
149211076 [] in ProcessorScheduler class>startUp
149211168 [] in BlockContext>newProcess
$1 = 259985308
(gdb) bt
#0  0x0002bd24 in resume (aProcess=131462172) at /Users/johnmci/ 
Documents/Squeak3.8.0/src/vm/interp.c:21212
#1  0x0002eb98 in synchronousSignal (aSemaphore=131461696) at /Users/ 
johnmci/Documents/Squeak3.8.0/src/vm/interp.c:22390
#2  0x00005b38 in checkForInterrupts () at /Users/johnmci/Documents/ 
Squeak3.8.0/src/vm/interp.c:3134
#3  0x000103fc in interpret () at /Users/johnmci/Documents/ 
Squeak3.8.0/src/vm/interp.c:8247
#4  0x9002b1e0 in _pthread_body ()

Anyway other things work, geting file permissions, working directory  
etc etc, and I guess it's enough for folks who want limited support  
under os-x using the carbon vm at 3.8.10 level.  IF anyone wants to  
fix or alter the sunits so that they won't fork the vm if platform is  
Mac OS & not unix then feel free...


On 1-Mar-06, at 3:57 AM, David T. Lewis wrote:

> OK, let me know if I can be of help.
>
> Dave
>
> On Wed, Mar 01, 2006 at 02:38:55AM -0800, John M McIntosh wrote:
>> David thank you the instructions, I was hoping to avoid having to
>> follow all of them.
>> I'll do other things this week, and perhaps revisit the issue in a
>> couple of weeks..
>>
>> On 28-Feb-06, at 4:01 AM, David T. Lewis wrote:
>>
>>> On Mon, Feb 27, 2006 at 10:57:45AM -0800, John M McIntosh wrote:
>>>> in my spare time today I was going to run the Sunits for OSProcess
>>>> under mac carbon 3.8.10b15.
>>>> However I'm unable to find a version of the plugin anywhere and  
>>>> I'm a
>>>> bit lazy and don't want to
>>>> face the hassle of trying to build a plugin from scratch. Therefore
>>>> if someone has a pre-build plugin for os-x
>>>> somewhere please email a link or how to obtain it.
>>>
>>> Hi John,
>>>
>>> In case you don't get someone to send a pre-built OSPP:
>>

--
======================================================================== 
===
John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
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