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

[Peter Wang]

On Fri, 10 Feb 2012 16:01:58 +1100 (EST), Julien Fischer <juliensf at csse.unimelb.edu.au> wrote:
> 
> For review by Peter Wang or Peter Ross.
> 
> Branches: main, 11.07
> 
> Fix bug #252: support parallel builds for the various build_all targets with
> mmc --make.
> 
> compiler/make.program_target.m:
>  	As above.

I spent a few minutes on this the other day, and came up with roughly
the same patch.  It didn't work very well when I tried it on the
standard library.

* mer_std.all_os - tried to make the same .mh file in parallel
* mer_std.all_css - made .cs files in parallel, then once again serially
* mer_std.all_javas - ditto
* mer_std.all_erls - ditto

Peter
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