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Re: macros for rpath support

From: Henrique de Moraes Holschuh
Subject: Re: macros for rpath support
Date: Wed, 22 May 2002 11:07:07 -0300
User-agent: Mutt/1.2.5i

On Wed, 22 May 2002, Bruno Haible wrote:
> Henrique de Moraes Holschuh writes:
> > This is very un-optimal. Some programs embed the prefix path to find other
> > files, and those would break quite hard.
> Oh, I gave an advice suitable for building relocatable binary
> packages. If that's not what you are doing, then please, can you tell
> why you don't want rpath entries in your shared libraries?

I am not doing anything of the sort. We are usually downstream maintainers
in Debian.  But lots of upstream autoconf scripts use $prefix to set the
default path for modules, for example.

Please use your own 'disable rpath' option (maybe --without-rpath ?) so that
it will not have side-effects when your autoconf macros get used by other
people in their configure scripts.

As for rpath in the distribution: We don't want rpath because rpath kills
any possibility of relocatable _libraries_, and causes ABI headaches between
distributions, for starters.  Sometimes rpath is the right thing to do, but
for a glibc Linux distribution, it isn't in the general case.

If you _really_ are curious about the issue, refer to the Debian libc5 to
libc6 transition issues, in our mailinglist archives.  And think about
cross-compiling issues, as well.

> What kinds of side effects of rpath have you experienced, that you
> would not have with LD_LIBRARY_PATH and similar workarounds?

Total and utterly broken systems. And, if I was not being clear enough, we
do NOT use LD_LIBRARY_PATH tricks in the distribution either. We use and the linker itself only, so that the users can do
whatever they want with rpath and LD_LIBRARY_PATH, and the local admin can
change our defaults if he really knows what he is doing.

  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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