* Rich Felker <dalias@aerifal.cx> [2014-02-06 20:07:55 -0500]:
> On Fri, Feb 07, 2014 at 02:01:36AM +0100, Szabolcs Nagy wrote:
> > +dirhack:
> > +	mkdir -p $(sort $(dir $(OBJS))) crt include lib tools
> 
> How does this avoid having the $(M) source root from $(OBJS)?

objs have no $(M) prefix

> >  include/bits:
> >  	@test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
> > -	ln -sf ../arch/$(ARCH)/bits $@
> > +	ln -sf ../$(M)/arch/$(ARCH)/bits $@
> 
> Having ../ prior to a possibly-absolute path $(M) seems wrong.

this was problematic for other reasons too so i create
the arch/... dir and symlink locally

attached second try (fixes install, dirs, symlink)

for in-tree builds it creates spurious '.mark' files
otherwise the same make should work in-tree and out-of-tree