Re: [Qemu-devel] [PATCH] make: remove generated objects from target dirs

["Michael S. Tsirkin" <mst@redhat.com>]

On Sun, Mar 04, 2012 at 01:25:59PM +0000, Peter Maydell wrote:
> On 4 March 2012 09:10, Michael S. Tsirkin <mst@redhat.com> wrote:
> > I ended up with qmp-commands.h in target directories,
> > which makes build fail as it is found before the
> > main header.
> > make clean fixes it, but it might get triggered
> > again when we make some header target-independent next.
> > It's easy to just make sure all such leftovers are
> > removed, so let's do this.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> >
> > diff --git a/Makefile b/Makefile
> > index e66e885..958a414 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -89,6 +89,7 @@ qemu-options.def: $(SRC_PATH)/qemu-options.hx
> >  SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
> >
> >  subdir-%: $(GENERATED_HEADERS)
> > +       $(call quiet-command,rm -f $(foreach header, $(GENERATED_HEADERS), "$*/$(header)"),)
> >        $(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C $* V="$(V)" TARGET_DIR="$*/" all,)
> 
> In general we don't have workarounds for "something
> moved directory and this broke builds not from clean"

Why don't we? It's cheaper than always doing
make clean after pull.

> (source file moved from hw/ to . being one that's bitten
> me before),

Why would that bite anyone? AFAIK files under source control
are handled fine. It's the generated ones that are
a problem.

> so why does just this one deserve to get an
> rm here rather than just asking the user to run
> 'make clean / distclean' ?
> 
> -- PMM