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Re: generated documentation

From: Werner LEMBERG
Subject: Re: generated documentation
Date: Tue, 22 May 2012 16:55:12 +0200 (CEST)

>> (1) If the user unpacks the tarball, the rules are not executed.
>> (2) If the user does a bootstrap from the repository to do `make
>>     dist', they are needed.
>> (3) If the user changes a doc source file in the tarball and wants
>>     to regenerate the documentation, the rules are needed too.
> ...
>> (b) If the tests for pandoc and pdftex fail, disable the build
>>     rules or provide no-ops.  This is OK for (1) and (3), but not
>>     satisfactory for (2).
> Why is (b) unsatisfactory for (2)?
> I'm presuming that when pandoc/pdftex are not found, not only are
> the standard makefile rules using them disabled, but alternative
> rules enabled which just say something like:
> if have_pandoc
>   foo.html: foo.tex
>       $(PANDOC) balah blah blah
> else
>   foo.html: foo.tex
>         echo 1>&2 "**** OMGOMG can't generate address@hidden"
>         echo 1>&2 "**** please install pandoc and reconfigure"
> endif

Thanks for your response!

I was a bit unclear.  Your solution happens at `make' time, which is
OK, and I will do what you suggest.  However, my question was
primarily related to the configure script, and I think I've found the
solution: If `configure' doesn't find the documentation files, checks
for pandoc and pdftex result in fatal errors if they aren't available,
otherwise they cause warnings only.


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