[Vm-dev] Re: Error compiling cog for MacOS 10.6

[Casey Ransberger]

Hmm. I didn't have any trouble compiling Cog on 10.6. Which Xcode version are you using?

On Jul 30, 2010, at 11:57 AM, Eliot Miranda <eliot.miranda at gmail.com> wrote:

> 
> 
> 
> On Fri, Jul 30, 2010 at 6:29 AM, Mariano Martinez Peck <marianopeck at gmail.com> wrote:
>  
> sorry....quick send...try again:
> Hi Eliot. I am trying to compie CogVM from XCode. If I choose "Mac OS X 10.5 (Base SDK)" CogVM compiles without problem.
> 
> But if I choose "Mac OS X 10.6" I have a compile error in ucontext.h line 42:
> 
> #error ucontext routines are deprecated, and require _XOPEN_SOURCE to be define
> 
> It comes from sqUnixVMProfile.x where you have:
> 
> #include <ucontext.h> 
> 
> 
> any ideas how can I fix this?
> 
> I guess three ways.  One is simply to define _XOPEN_SOURCE.  But better is to figure out how to get the program counter pointer value from a signal handler in 10.6.  i.e. what the profiler does is periodically sample the VM thread's program counter.  It does this using a thread that sends SIGPROF to the VM thread and have the SIGPROF handler (pcbufferSIGPROFhandler) get the interrupted pc from the ucontext structure passed into the signal handler.  Presumably there's a new way of doing this in 10.6.  Find out what that is.
> 
> The third way is simply to define NO_VM_PROFILE and then the file will provide only stubs and you'll have no functional VM profiler.
> 
> HTH
> Eliot
> 
> 
> 
> Thanks!
> 
> Mariano
> 
> 
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