Eric Blake <ebl...@redhat.com> writes:

> On 03/22/2017 03:20 AM, Joakim Jalap wrote:
>> Hello autoconf gurus!
>> 
>> I am trying to write some autotools support for installing a latex
>> package. On CTAN I found some autoconf macros (which I had to modify a
>> bit) which I use to find for example latex(1) and pdflatex(1). So far so
>> good. This CTAN package also has a macro to find the path to the tex
>> installation, AC_TEXMF_PATH. This finds the correct path for me at
>
> It's poor practice to name a macro in the AC_ namespace if it is not
> actually owned by autoconf; you may want to choose a different namespace
> to make it obvious where the macro originates from.
>

Well I didn't choose it. That's the way it was in CTAN. But point taken.

> Indeed, thanks to the magic of m4 diversions, AC_PREFIX_DEFAULT expands
> to code that appears very early in configure, and using a shell variable
> that early in the run is tricky; while AC_MSG_NOTICE expands to code
> that runs at the place where the macro was used.

Well that's a shame. But I found another way anyway. See below.

> Is AC_PREFIX_PROGRAM any better for your use case?

Not really. I'm not installing any programs, only data. But I found a
solution: I can use the 'kpsewhich' program to find the correct texmf
directory. So now I do

AC_PREFIX_DEFAULT([`pksewhich --var-value TEXMFHOME`])

and it works!

Thanks for your time!

-- Joakim

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