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bug#10997: pkglibexecdir is unconditionally created when make install

From: Peter Breitenlohner
Subject: bug#10997: pkglibexecdir is unconditionally created when make install
Date: Mon, 12 Mar 2012 12:21:51 +0100 (CET)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Mon, 12 Mar 2012, Stefano Lattarini wrote:

On 03/12/2012 05:55 AM, Daiki Ueno wrote:
I got a bug report for my package, which conditionally installs some
scripts into pkglibexecdir like this:

pkglibexec_SCRIPTS = bar

where pkglibexec* is not referred outside of if...endif.  When "make
install", automake creates pkglibexecdir even when ENABLE_FOO is false.

I'm attaching a prove which demonstrates the behavior.

I agree it would be nice to avoid creating directories that are not actually
needed; still, this is a low-priority bug, and I'm not yet sure how difficult
it would be to fix.  For the moment, I've committed (in your name) the test
case you've sent us (with minor tweakings), so that the bug will at least
remain exposed in the testsuite.  Attached is the patch I've pushed (to maint).

Fixing this particular case might be fine, but please watch out.
In the quite similar (unconditional) case
  pkglibexec_SCRIPTS =
one might actually expect that that $(pkglibexecdir) is created
unconditionally.  (Perhaps because 'install-exec-local' or
'install-data-local' wants to install some files into that directory.)

In the TeX Live build system we actually use something quite analogous:
  nodist_bin_SCRIPTS =
  texmfdir = $(datarootdir)/texmf/scripts/xindy
  nodist_texmf_SCRIPTS = texindy.pl xindy.pl
  install-data-hook: install-perl-links
where 'install-perl-links' installs in $(bindir) the symbolic links
'texindy' and 'xindy' pointing to the respective perl scripts in

To summarize: 'nodist_bin_SCRIPTS =' is an extremely convenient way to
ensure that $(bindir) -- or rather $(DESTDIR)$(bindir) -- exists.

Peter Breitenlohner <address@hidden>

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