On Thu, 21.10.2010 at 21:50:26 +0200, Erik Cederstrand wrote:
> Den 21/10/2010 kl. 19.57 skrev Ulrich Spörlein:
> > On Mon, 11.10.2010 at 11:35:42 +0200, Erik Cederstrand wrote:
> >> I'm beginning to think that it should at least be optional. Removing e.g.
> >> build times, mtimes and path to OBJDIR or SRCDIR might not make everyone
> >> happy.
> >
> > The problem with making it optional is, that we already have enough
> > flags and knobs. No need in adding more.
> >
> > Besides, why would people want to know the date of the build? Far more
> > important is the date and state of the source for the time of build. So
> > you might want to replace ${BUILDATE} with ${SRCDATE} somehow (time of
> > last commit?).
> >
> > Otherwise, please go for it. It would be nice if two people compiling
> > GENERIC for the same source-base would get identical binaries.
>
> It goes without saying that I agree with you on this. But it seems the
> feature will require fairly invasive changes to a standard FreeBSD, e.g.
> changing standard ar behavior, and building kernels and some other tools
> without debugging symbols. I'm not experienced enough to determine if this is
> fine with the majority of users, but hiding the changes under a knob would at
> least let the feature prove itself and put off bikeshedding for a while. If
> the project works out, we can discuss changing the default.
>
> I'm still not sure what to do with debugging symbols. Currently absolute
> paths to source files are used. I would like to change that to absolute paths
> , i.e. usr.bin/ar/ar.c. That might even be beneficial if someone is debugging
> the binary on a system that doesn't have the source tree located in
> /some/obscure/directory/src. It's my understanding that gdb uses the path to
> look up source code related to stack traces etc. It seems gdb can handle
> relative paths, but I have no idea if it actually works, or if it's a
> nuisance to use compared to absolute paths. Any hints?
Why do you make this a requirement? Of course it's usually easier to
build different releases from different source directories, but I think
requiring the following conditions are fine:
1. If you build a specific svn revision,
2. sitting in /usr/src with
3. the default make.conf (ie., no special flags, no frobbing of OBJDIR)
4. at different times
then you get the same binaries.
Let's start with an achievable, not-so-intrusive goal, right? :)
Uli
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