Hi Again, On 11/3/22 21:31, Bojan Smojver via devel wrote: > This may be a trivial question, but my friend Google is not showing me any obvious answers, so I will ask here at my own peril. > > Say one needs to configure and build the same source with two (or more) different sets of options that generate different binary RPMs, but which have files in exactly the same place. This is to support different hardware. The end result would be mutually conflicting binary packages that users then install etc. > > Sure, it is easy enough to configure/build repeatedly and stash the results into non-conflicting paths of buildroot, but how does one then package this in %files sections into exactly the same paths? > > If there is an example floating somewhere, that would be very useful. I just realized that my IPU6 plans might be useful for you regardless of if that is your use case too. So the IPU6 userspace bits consist of a bunch of closed source .so files in 2 different variants for 2 different hw generations. Against this a libcamerahal.so gets build, which build is also hw generation specific. And then there is a gstreamer-1.0 plugin which consumes libcamerahal.so, but which build is not hw generation specific (AFAICT, still need to verify this). I want support for both hw generations to be installed at the same time, rather then have 2 conflicting subpackages because I don't want users to have to know which generation they exactly have. And I want this to work with a read-only /usr. So here is what I've come up with (from my own notes, so might be a bit cryptic): -Rename libcamerahal.so to libcamerahal-ipu6<ver>.so and patch in a rpath to /usr/lib64/ipu6<ver> for the other libs, then make libcamerahal.so a symlink to /run/libcamerahal.so which is a symlink to the one we actual want; and have udev-rules dynamically set /run/libcamerahal.so symlink -See: https://github.com/Linuxbrew/legacy-linuxbrew/issues/7 for ideas to set the rpath -Needs something to allow building on non IPU6 systems -> hack .pc file to just always point to the plain (tgl) ipu6 version -Patch hal s|share/defaults/etc|share/defaults/etc/ipu6| for different etc dirs per IPU6 version Maybe the rpath tricks + making the actual lib (or binary) a link to /run/foo and then have a udev rule create /run/foo to point to the right version depending on the hw it is running on might be useful for you too ? Regards, Hans _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
