Re: [Qemu-devel] [PATCH v6 2/8] rule.mak: allow per object cflags and libs

[Paolo Bonzini <pbonzini@redhat.com>]

Il 12/09/2013 04:52, Fam Zheng ha scritto:
>>> > >  define unnest-dir
>>> > >  $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
>>> > >  $(eval obj-parent-$1 := $(obj))
>>> > >  $(eval obj := $(if $(obj),$(obj)/$1,$1))
>>> > >  $(eval include $(SRC_PATH)/$1/Makefile.objs)
>>> > > +$(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(if $(obj),$(obj)/)))
>>> > >  $(eval obj := $(obj-parent-$1))
>>> > >  $(eval obj-parent-$1 := )
>>> > >  $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
>>> > > 
>> > 
>> > I'm not sure this will work for targets in the toplevel directory when
>> > obj-base is not empty.  This can be fixed later though, as part of a
>> > general revamping of obj-base.  Please add a FIXME comment.
>> > 
> I'm not sure about the problem, can you give an example, so I can be specific
> in the comment?

Can you try using vl.o-cflags instead of a per-target QEMU_CFLAGS?  I
think it won't work, because the toplevel Makefile.objs is included
directly and not through unnest-dir.

Paolo