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Date: Tue, 8 Dec 2015 19:39:14 -0500
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: Support for out-of-tree build
Sorry it took me a while to get to this (and other pending musl
stuff). Here's my review:
On Tue, Dec 01, 2015 at 02:14:29AM +0000, Petr Hosek wrote:
> On Mon, Nov 30, 2015 at 2:14 PM Rich Felker <dalias@...c.org> wrote:
>
> > > 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.
> >
>
> I've removed the trailing slashes as discussed on IRC and this should work
> now.
I get:
make: *** No rule to make target `obj/include/bits', needed by `obj/include/bits/alltypes.h'. Stop.
I think this is because $(dir...) intentionally leaves the trailing
slash, so you have to remove it to get the desired behavior.
First I tried:
OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(OBJS) $(GENH) $(GENH_INT))) $(addprefix obj/, crt crt/$(ARCH) include))
but this does not seem to be sufficient, because of:
$(OBJS) $(LOBJS): | $(sort $(dir $(OBJS)))
Adding patsubst there would work too, but I wonder if it even makes
sense to have fine-grained dir dependencies, rather than just making
all the targets in this section of the makefile depend on $(OBJ_DIRS).
Thoughts?
> > Manually creating the directory makes the build succeed. I also get,
> > when re-running configure:
> >
> > creating config.mak... ln: ./Makefile: File exists
> > done
> >
> > Not an error, but confusing and not what I would expect.
> >
>
> I've added a check to configure script.
../configure: Makefile already exists in the working directory
This isn't what I would expect either. Normally you want to be able to
re-run configure with different options. There's probably a little bit
of subtlety here because we would like to avoid overwriting an actual
file (if somebody copied and edited a makefile here) but happily
replace a symlink.
Aside from these issues it seems to be okay/working for me. I'd
appreciate comments from anyone else who's tried it.
Rich
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