Re: Merging rules

[Basin Ilya]

> I do believe the
> command is run only once, which is fine because it produces both files

I think that `make all` depends on just one output of that rule. If you really 
want to such command only once, then don't mention additional outputs in the 
makefile or choose a primary output and make the others depend on it (but 
you'll have to ensure that the additional outputs are newer then the primary 
output, using `touch`)


On 13.06.2018 21:32, Sébastien Hinderer wrote:
> Hi, Basin!
> 
> Basin Ilya (2018/06/13 21:15 +0300):
>> Hi Sébastien.
>>
>>
>>> Then make will think that with only one invocation all the different
>>> types of files will be produced, which is of course wrong.
>>
>> I think you've got a wrong impression. Make will run the rule as many
>> times as needed to make all the targets.
> 
> Strange: I have a Makefile with a rule to generate a parser from a
> grammar and that parser consists in two files, and I do believe the
> command is run only once, which is fine because it produces both files
> at the same time.
> 
> Or perhaps is that the difference between pattern rules and static
> pattern rules?
> 
> Sébastien.
> 
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