Re: [PATCH v4 for-5.0] configure: warn if not using a separate build directory

["Daniel P. Berrangé" <berrange@redhat.com>]

On Sun, Apr 05, 2020 at 03:38:55PM +0100, Peter Maydell wrote:
> On Fri, 3 Apr 2020 at 14:53, Daniel P. Berrangé <berrange@redhat.com> wrote:
> >
> > Running configure directly from the source directory is a build
> > configuration that will go away in future. It is also not currently
> > covered by any automated testing. Display a deprecation warning if
> > the user attempts to use an in-srcdir build setup, so that they are
> > aware that they're building QEMU in an undesirable manner.
> >
> > Reviewed-by: Eric Blake <eblake@redhat.com>
> > Reviewed-by: Markus Armbruster <armbru@redhat.com>
> > Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> > Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> > Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> > ---
> 
> > +if test "$in_srcdir" = "yes"; then
> > +    echo
> > +    echo "WARNING: SUPPORT FOR BUILDING IN THE SOURCE DIR IS DEPRECATED"
> > +    echo
> > +    echo "Support for running the 'configure' script directly from the"
> > +    echo "source directory is deprecated. In-tree builds are not covered"
> > +    echo "by automated testing and thus may not correctly build QEMU."
> > +    echo "Users are recommended to use a separate build directory:"
> > +    echo
> > +    echo "  $ mkdir build"
> > +    echo "  $ cd build"
> > +    echo "  $ ../configure"
> > +    echo "  $ make"
> > +    echo
> > +fi
> 
> So here's my stab at some text here; I'm aiming at nudging users
> towards out-of-tree builds if they were simply not thinking about
> it, but not actively marking them as 'deprecated', since it sounded
> to me like we were planning to keep at least the basic
> 'configure+make+make install' sequence of commands working.
> 
> echo "NOTE: we recommend against building in the source directory"
> echo
> echo "You've run the 'configure' script directly from the source"
> echo "directory. This will work, but we recommend using a separate"
> echo "build directory, especially if you plan to work with the QEMU"
> echo "sources rather than just building it once. You can switch to"
> echo "a separate build directory like this:"

I'm fine with that text too.

I'll submit another version of the patch with that incorporated


Regards,
Daniel
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