GNU bug report logs - #12064
distclean failure with Automake 1.12.2

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Message #8 received at 12064 <at> debbugs.gnu.org (full text, mbox):

From: Stefano Lattarini <stefano.lattarini <at> gmail.com>
To: Peter Johansson <trojkan <at> gmail.com>
Cc: 12064 <at> debbugs.gnu.org
Subject: Re: bug#12064: distclean failure with Automake 1.12.2
Date: Fri, 27 Jul 2012 11:08:50 +0200

severity 12064 minor
thanks

On 07/27/2012 04:12 AM, Peter Johansson wrote:
> Hi automakers,
> 
> I was about to make a release when I discovered that distcheck suddenly didn't work
> anymore.  The distclean rule failed with
> 
> Making distclean in doc
> make[2]: Entering directory `/home/peterJo/projects/software/yat-0.8.x/yat-0.8.2/_build/doc'
> Makefile:498: ../yat/classifier/doxygen.mk: No such file or directory
> Makefile:499: ../yat/normalizer/doxygen.mk: No such file or directory
>
[Aside:
 This seems quite a complex and brittle occurrence of inter-directory dependencies;
 have you thought about the possibility of converting to a non-recursive setup?  I
 have done so with Automake itself (since version 1.12), and have been very, very
 happy with that move so far.]

> This was for a stable branch release so there had just been minor changes in two .cc files
> and no changes at all wrt the build system. After some investigation I found that Automake
> 1.12.2 has changed the order directories are traversed for clean rules.
>
I thought of this change as a mere cleanup actually, since the previous different
order of directory traversal for clean rules was basically a relic needed by the
older (and now long-dead) implementation of automatic dependency tracking:
<http://www.gnu.org/software/automake/history/automake-history.html#First-Take-on-Dependencies>

> I must say I find
> it unexpected that behaviour like this is changed between 1.12.1 and 1.12.2. I thought this
> kind of changes were only introduced when bumping versions from say 1.11 to 1.12 and not
> between stable releases.
>
> The reason I got the failure is that files doxygen.mk are included into doc/Makefile.
> These files are generated in the corresponding Makefile and listed under DISTCLEANFILES
> so they are deleted during 'make distclean'. As SUBDIRS in top Makefile.am is
> "SUBDIRS = doc yat" that was not a problem before since doc was entered first during
> cleaning and doc/Makefile was already gone when the doxygen.mk files were removed.
>
> Perhaps a strange use case, but still I wanted to report it.
>
And you did well; perhaps this this worth some documentation addition?
Not sure.  Anyway, a good reason to keep the bug report open for now.

> I think I've found a workaround
>
Curios: which workaround?

> so I can get out the release without needing to
> downgrade Automake.
> 
> Thanks,
> Peter
> 

Regards,
  Stefano

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