Re: Automake 1.15 + subdir-objects using $(top_srcdir) in *_SOURCES

[Tom Ghyselinck]

Hi Bert,

Thank you for the quick reply!
Any idea when a new automake (bugfix) release will be available?
I will try to live with the warning for now 
With best regards,
Tom.

-- 
Tom Ghyselinck <address@hidden>
Excentis N.V.On di, 2015-08-18 at 10:59 +0200, Bert Wesarg wrote:
> Hi,
> 
> On Tue, Aug 18, 2015 at 10:08 AM, Tom Ghyselinck
> <address@hidden> wrote:
> > Hi all,
> > 
> > I just upgraded to automake-1.15.
> > 
> > I got a warning about future incompatibilities:
> >     src/Makefile.am:205: warning: source file
> > 'StackControllers/AbstractController.cpp' is in a subdirectory,
> >     src/Makefile.am:205: but option 'subdir-objects' is disabled
> >     automake: warning: possible forward-incompatibility.
> >     automake: At least a source file is in a subdirectory, but the
> > 'subdir-objects'
> >     automake: automake option hasn't been enabled.  For now, the
> > corresponding output
> >     automake: object file(s) will be placed in the top-level
> > directory.  However,
> >     automake: this behaviour will change in future Automake
> > versions: they will
> >     automake: unconditionally cause object files to be placed in
> > the same subdirectory
> >     automake: of the corresponding sources.
> >     automake: You are advised to start using 'subdir-objects'
> > option throughout your
> >     automake: project, to avoid future incompatibilities.
> > 
> > We use "/.cpp" in some "*_SOURCES" entries in
> > our
> > "Makefile.am" files.
> > 
> > Since I don't like warnings, I followed the suggestion and added
> > the "s
> > ubdir-objects" option in our configure.ac.
> > 
> > Now, in one of our Makefile.am we are using
> >     gtest_SOURCES = $(top_srcdir)/src/globaloptions.cpp ...
> > 
> > We build our project in /tmp/build.
> > When trying to execute "make clean" for our project, we get the
> > error:
> >     Making clean in testing
> >     make[2]: Entering directory '/tmp/build/src/testing'
> >     Makefile:1193: /path/to/source/src/.deps/gtest
> > -globaloptions.Po: No such file or directory
> >     make[2]: *** No rule to make target
> > '/path/to/source/src/.deps/gtest-globaloptions.Po'.  Stop.
> >     make[2]: Leaving directory '/tmp/build/src/testing'
> >     Makefile:1513: recipe for target 'clean-recursive' failed
> > 
> > Is this a known issue?
> > Or is it incorrect to use "$(top_srcdir)" in the "*_SOURCES"
> > directive
> > when using the "subdirs-objects" option?
> > 
> > We would like to keep using the "$(top_srcdir)" since the subdirs
> > where
> > the Makefile.am using this resides may move around in the project
> > directory tree.
> > 
> > Can anyone explain what is going wrong or how we should update this
> > to
> > keep this working?
> > 
> > Thank you in advance!
> 
> I would say you hit two bugs already fixed after the release of 1.15.
> 
> http://debbugs.gnu.org/13928
> 
> Bert
> 
> > 
> > With best regards,
> > Tom.
> >