On Thu, Jan 5, 2017 at 6:08 PM, Brendan Conoboy <blc@xxxxxxxxxx> wrote: > On 01/05/2017 02:08 PM, Stephen Gallagher wrote: > [snip] >> >> == multi-arch layout == >> * Moving the locations of all of the system libraries would potentially >> still >> break third-party applications that were compiled to expect libraries to >> be in >> the /usr/lib[64] paths. This would be a similar problem to the UsrMove >> change >> and would likely be solved the same way; by maintaining symlinks in the >> old >> locations for some reasonable migration period. Given the enormous number >> of >> packages involved and the fact that it's not a simple directory rename, we >> may >> need to add a hack into rpmbuild to automatically generate these symlinks >> in the >> old location. >> >> * Switching to this layout might give a false (or possibly accurate, in >> some >> cases) impression that one could expect Debian/Ubuntu packages to function >> "out >> of the box" on Fedora (if using something like Alien). Education is key >> here. > > [snip] > > For anyone who isn't familiar with this topic, you might find Debian's > documentation useful: > > https://wiki.debian.org/Multiarch > > One could take it a step further and actually have target triplets the > convey OS version of the libraries instead of the generic "-redhat-linux" > part of the tuple. With a little rpath abuse apps compiled for F25 could > find their shared libraries in an F25 specific directory and multiple > versions of the same package could be installed at the same time, for > different OS versions. This goes beyond Fedora, too: apps compiled for > Debian could find their shared libraries in a Debian specific directory, > even though it's a Fedora system that is booted. A lot of fiddly details > and hand waving go here, but the end result would be really useful. > We wouldn't have to mess with the platform triple for that. We could simply add another namespace. For example: /usr/lib/<platform>/<vendor>/<distname>/<distrel>/ So, x86_64 libraries for Fedora 25 would go into /usr/lib/x86_64-linux-gnu/redhat/fedora/25/ Some handwavy magic there, and you could do this for a multitude of distros... -- 真実はいつも一つ！/ Always, there's only one truth! _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
