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Re: Finding APR, etc.

From: Karl Fogel <kfogel_at_newton.ch.collab.net>
Date: 2002-08-15 23:29:29 CEST

Wilfredo Sánchez <wsanchez@mit.edu> writes:
> > You are building those things, and you told SVN what prefix to use for
> > installation. That is simply the nature of things.
> No that's a cop-out, I does svn what _its_ prefix is. I don't expect
> svn to install neon. That it uses neon at all is an implementation
> issue
> in svn. If it needs to install it, fine. But I shouldn't have to worry
> about SVN installing neon such that some other software will see and use
> it, since installing svn isn't really the right way to install neon.

I think Fred has a point.

It's true that Subversion can *use* a pre-installed APR or Neon or
whatever, if one is present. But when building svn from scratch
sources, using in-tree dependencies, then the user didn't ask to
install those dependencies as visible things, any more than she
"asked" for Subversion to be written in C instead of Cobol :-). She
just wants a working binary and libraries. Subversion should manage
its dependencies opaquely, not in a way that might affect other things
on the system.

I'm not making any claims about the ease of solving this, nor the
importance of doing so; just agreeing that it's a bug.

It seems like the best behavior would be:

  * If you deliberately build and install Neon (or whatever) on your
    system, then Neon gets installed, naturally. This is independent
    of Subversion.

  * When you build Subversion, you tell it (either explicitly or by
    implication) what Neon to use. If you tell it to use the
    pre-installed Neon, then it uses that one. If you tell it to use
    an in-tree Neon, then Subversion should use that Neon, and install
    it in a place that affects only *that* instance of Subversion
    (there might be a Neon already installed in some standard place on
    the system, but that's none of Subversion's business -- we weren't
    told to use that Neon, nor were we told to change it).


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Received on Thu Aug 15 23:47:02 2002

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