On Mon, Jun 27, 2011 at 03:31:24PM +0200, Vincent Lefevre wrote: > On 2011-06-27 11:54:53 +0100, Steve Langasek wrote: > > Work is ongoing to formulate a proper, distribution-neutral interface for > > querying the correct multiarch path for a system. In the meantime, if you > > are an upstream affected by this issue, or a maintainer of a package whose > > upstream is affected, you are welcome to join us in discussing these matters > > on debian-devel as well.
> > A summary of currently known upstream compatibility issues, and the status > > of prospective patches for them, can also be found in the Debian wiki here: > > http://wiki.debian.org/Multiarch/TheCaseForMultiarch#Impact > Just a comment... > How libraries are searched is not clear, but depending on how this > is done, there may be compatibility issues when the user installs > software in his home directory, in case he or some tool installs > libraries in $prefix/lib instead of $prefix/lib/<arch>. > For instance, if all the default .../lib/<arch> directories have > the precedence over the .../lib directories listed in the user's > $LIBRARY_PATH, bad things can happen. This is the choice followed > by upstream GCC (lib64 directories have the precedence over the > user's lib directories), with the following consequence: > http://gcc.gnu.org/ml/gcc-help/2010-11/msg00341.html This particular issue will not occur with multiarch, because /usr/lib/<arch> will never be a symlink to /usr/lib in the canonical implementation. A user could do this locally, but there's no good reason to ever do so. As a practical matter, the runtime path will list all of the multiarch paths before all of the non-multiarch paths. (It does this already today.) If nothing else, we do need to list out these directories in /etc/ld.so.conf.d (because other things parse these files), and it's impractical to have a different config file for each of the multiarch paths for each architecture. > Related to that, will Linux support fat binaries[*] one day? I don't agree that this is related. :) -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slanga...@ubuntu.com vor...@debian.org -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20110627144246.gf31...@virgil.dodds.net
