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Re: Dependencies and other issues with generated files

From: Stefano Lattarini
Subject: Re: Dependencies and other issues with generated files
Date: Thu, 28 Jun 2012 14:21:40 +0200

On 06/28/2012 01:25 PM, David Sveningsson wrote:
>>>     app_SOURCES = main.c
>> I'm not sure how well listing the .foo file in _SOURCES is going to
>> work, although someone who knows more about automake guts might be able
>> to tell us exactly what happens.  You should probably list the .c file
>> here, or in nodist_app_SOURCES if the generated source file is not meant
>> to be distributed.
> The source is meant to be distributed, not the generated file. The tool
> will be required to build. Adding it to sources seems to work but maybe
> it is wrong and only works by accident.
Actually, this usage is covered by the testsuite (albeit undocumented),
so you should be pretty safe.  Note however that support for it has been
removed from Automake-NG (the Automake fork aimed at targeting GNU make

>> Automake does not, and cannot, generate clean rules for files it does
>> not know about.  So I'm afraid that's your job.  Such rules are usually
>> pretty easy to write, for example if you have all your .foo files in a
>> variable:
>> and the tool generates .c and .h files from a .foo file, then something
>> like
>>  CLEANFILES = $( $(
>> is probably sufficient.  For more involved cases, you might add a
>> --clean option to your tool which deletes any files that it generates,
>> and then call it from clean-local.
> But it knows .c is compiled to .o and clean it properly. Does automake
> have such filename mappings hardcoded?
Basically yes, and in a quite messy way actually.  Sorry.

> Would it be possible to add a custom primary such as
>     app_FOOFILES =
> kind of similar to "python_PYTHON"?
Not without patching Automake itself.  Automake is pretty inflexible in
this regard.

> Thanks for the help so far!


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