automake warnings

[Geert Janssens]

On Thursday 05 February 2015 14:21:00 Alex Aycinena wrote:
> When I run './autogen.sh' on my Fedora 21 machine, I get the
> following:
> 
> Makefile.am:10: warning: source file 'util/guile.c' is in a
> subdirectory, Makefile.am:10: 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.
> 
> followed by many messages like the following:
> 
> src/app-utils/Makefile.am:40: warning: source file
> 'calculation/expression_parser.c' is in a subdirectory,
> src/app-utils/Makefile.am:40: but option 'subdir-objects' is disabled
> 
> This is between the lines:
> 
> Running automake --add-missing --gnu --warnings=no-portability  ...
> 
> and
> 
> Running autoconf ...
> 
> configure, make and make install all seem to work fine.On my Fedora 20
> machine I don't see these warnings.
> 
> I don't know if this is because of something different in my
> environment between the two or because of the versions of the tools
> in the two machines.
> 
> Can someone give me feedback? I believe, Geert, you use Fedora also.
> Do you see this as well?
> 
For the record, yes, I do see them on my F21 laptop and not on my F20 workstation.

Geert