[m-rev.] for review: fix bug #252 - mmc -jN --make for build_all targets

[Julien Fischer]

On Fri, 10 Feb 2012, Peter Wang wrote:

> On Fri, 10 Feb 2012 16:43:18 +1100 (EST), Julien Fischer <juliensf at csse.unimelb.edu.au> wrote:
>>
>> Were you doing this via mmake --use-mmc-make or using mmc --make
>> directly?
>
> mmc --make directly.
>
> MERCURY_COMPILER=/path/to/mercury_compile \
>    mmc -m mer_std.all_erls -j6 --flags LIB_FLAGS \
>    --allow-stubs --no-halt-at-warnq

Wow!  That's weird.  I've tried this patch with a few libraries from G12
(on all four backends) and haven't encountered that problem -- they work
at -j8 just as you would expect.

I'm going to go ahead  and commit this as it seems to work for things
that aren't the Mercury standard library.   Pete (Ross), can you give
this a go with your code and see what happens.

Julien.
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