[m-dev.] Mmake unnecessary recompilation bug

[Simon Taylor]

On 07-Feb-2004, Fergus Henderson <fjh at cs.mu.OZ.AU> wrote:
> As a result of Simon's recent changes, *.o now depends on *.mh.
> 
> The .mh files get regenerated at every compilation, and since we don't
> have .mhdate files, this forces *.o to get rebuilt every time you run
> Mmake, even if the .mh files haven't changed.
> 
> I suppose the simplest fix would be to add .mhdate files.

Unless I'm missing something, I think the problem is that the `.mh' files
aren't created using modules.update_interface (the `.mih' files are).

Simon.
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