Hi Carlos, What's the status of this patch? Thanks, Michael On Tue, 2 Jun 2020 at 08:14, Florian Weimer <fweimer@xxxxxxxxxx> wrote: > > * Carlos O'Donell: > > > +Care should be taken when packaging such application with a package manager, > > +particularly the scenario where an optimized library is being removed. With > > +certain package managers, particularly rpm, the newer version of the > > Twice “particularly”. > > > +application is installed first, which means that for a period of time during > > +the upgrade all applications that use the library may start with a mixed set of > > +libraries e.g. the old library from the feature-based search path, and new > > Commas arount e.g.? > > > +libraries from the upgrade. To avoid this scenario the new library version > > +should delete all known optimized libraries in the post-install phase. > > There is a different mechanism: Debian has patched glibc to disable > hwcap subdirectors if the file /etc/ld.so.nohwcap exists. > > You now list the AT_PLATFORM directories (determined by the kernel on > most architectures) along the regular hwcaps directories, although they > are handled somewhat differently. For example, on s390x, if you have a > “z15” machine (as indicated by AT_PLATFORM), the “z13” subdirectory is > not selected. ldconfig will add it to the cache, but it will not be > used at run time. I'm not sure if your proposed description gives > readers the right idea what happens. > > Thanks, > Florian > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
