[m-rev.] diff: enable par grades on MacOS X

[Fergus Henderson]

On 05-May-2003, Peter Ross <pro at missioncriticalit.com> wrote:
> This patch allows one to build the hlc.par.gc grade on MacOS X, however
> when you try and run an executable you get an illegal instruction error.

Can you please back out this change until it actually works?

> +	*powerpc*apple*)
> +		CFLAGS_FOR_THREADS="-DMR_THREAD_SAFE"

You will need to pass some additional `-D' option to tell the Boehm
collector to work in thread-safe mode.

I don't think the version of the Boehm collector that is included
with the Mercury distribution supports thread-safe mode on MacOS X.
The most recent version (6.2alpha4) does, though.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.
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