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Re: avoiding leftover built sources

From: Bruno Haible
Subject: Re: avoiding leftover built sources
Date: Sun, 21 Mar 2010 16:07:59 +0100
User-agent: KMail/1.9.9

Jim Meyering wrote:
> It's the one in ../lib/fcntl.h that is the culprit.
> And *it* was not removed via "make distclean"
> since grep proper does not use the fcntl module.
> There was also a lib/fcntl.in.h symlink.
> ...
> The solution was simply to remove the vestigial lib/fcntl.{,in.}h

It looks like 'grep' was using the 'fcntl-h' (or 'fcntl') module
earlier. This created the lib/fcntl.h and lib/fcntl.in.h that you were
observing. At some point, then, changes in gnulib or in grep/bootstrap.conf
caused these files to become stale and cause trouble. At this point, the
'distclean' rule in lib/Makefile.am was also changed to no longer remove

What can we do about it? I think gnulib-tool would already have removed
lib/fcntl.in.h, but it would not have done anything about lib/fcntl.h.

  a) bootstrap could call "make -k distclean 2>/dev/null" right at the

  b) When a module is not used any more and was used earlier, gnulib-tool
     (and bootstrap, since it duplicates the logic) could look whether
     the module has some MOSTLYCLEANFILES and, if so, remove these files,
     keeping a backup, of course.

  c) I think, gnulib-tool removes the file from .gitignore. So you could
     have noticed the problem by looking at "git status".

Solution a) seems the most reliable to be. What do you think?


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