GNU bug report logs - #7403
Unused variable `$source' in the depcomp script?

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Message #8 received at 7403 <at> debbugs.gnu.org (full text, mbox):

From: Ralf Wildenhues <Ralf.Wildenhues <at> gmx.de>
To: Stefano Lattarini <stefano.lattarini <at> gmail.com>
Cc: 7403 <at> debbugs.gnu.org
Subject: Re: bug#7403: Unused variable `$source' in the depcomp script?
Date: Sat, 20 Nov 2010 13:29:10 +0100

* Stefano Lattarini wrote on Mon, Nov 15, 2010 at 01:03:04AM CET:
>  $ grep '\<source\>' lib/depcomp 
>    source      Source file read by `PROGRAMS ARGS'.
>  if test -z "$depmode" || test -z "$source" || test -z "$object"; then
>    echo "depcomp: Variables source, object and depmode must be set" 1>&2
>      # the object too, otherwise makedepend will parse it as a source file.
> 
> Does this mean that the `$source' variable is really not required
> by depcomp, or am I missing something?

It seems that $source is indeed not required.

I'd still be wary of removing it: users might have modified depcomp
scripts which use the variable.  Yes, I consider that public API,
documented in 'depcomp --help', and with example usage in the manual.

In a sort of transposed way, there are packages using depcomp (plus some
custom macros) which do not use Automake; we should not break them
either.

Thanks,
Ralf

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