[m-rev.] trivial diff: workaround for nightly builds

[Julien Fischer]

On Fri, 2 Feb 2007, Julien Fischer wrote:

>
> I'll look into the actual cause of this later today.
>
> Estimated hours taken: 1
> Branches: main
>
> library/thread.m:
> 	Workaround a problem that has broken the nightly builds on those
> 	hosts that compile using a lowlevel C grade.
>
> Julien.
>
> Index: library/thread.m
> ===================================================================
> RCS file: /home/mercury/mercury1/repository/mercury/library/thread.m,v
> retrieving revision 1.2
> diff -u -r1.2 thread.m
> --- library/thread.m	1 Feb 2007 08:07:59 -0000	1.2
> +++ library/thread.m	1 Feb 2007 14:43:13 -0000
> @@ -54,6 +54,16 @@
>
> %-----------------------------------------------------------------------------%
>
> +    % XXX The following is necessary in order to avoid compilation errors in
> +    % lowlevel grades.  For some reason parent modules are not #including
> +    % their own .mh files.  Without this declaration the code for spawn/3
> +    % will not compile.  This can be removed once the problem with the .mh
> +    % files is fixed.
> +    %

This is quite an old bug apparently; it affects Mercury 0.12 and 0.13 as
well.

Julien.
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