Re: Support for out-of-tree build

[Rich Felker <dalias@libc.org>]

On Mon, Nov 30, 2015 at 02:49:47AM +0000, Petr Hosek wrote:
> On Sun, Nov 29, 2015 at 5:36 PM Rich Felker <dalias@libc.org> wrote:
> 
> > With ARCH=sh and SUBARCH=-nofpu and ASMSUBARCH=-nofpu, it looks to
> > me like both src/setjmp/sh/setjmp.o and src/setjmp/sh-nofpu/setjmp.s
> > will get included, rather than the latter replacing the former.
> >
> 
> Thanks, I managed to replicate that error.
> 
> 
> > > When I tried this change, I started getting duplicate symbol errors when
> > > linking libc.so, but with the original it seems to be working fine (this
> > > particular case was when ARCH=arm SUBARCH=hf ASMSUBARCH=ebhf).
> >
> > I didn't mean to get rid of the existing subst, but to introduce a
> > second one, so that src/whatever/$(ARCH)@(ASMSUBARCH)/foo.o
> > excludes/replaces both src/whatever/$(ARCH)/foo.o and
> > src/whatever/foo.o.
> >
> 
> Got it, I've added the additional subst which solves the problem.

I'm trying it again now, and I'm still getting an error trying to
build in a fresh out-of-tree dir:

make: *** No rule to make target `obj/crt/i386/', needed by `obj/crt/crt1.o'.  Stop.

Rich