On 02/23/2018 04:08 PM, Marek Marczykowski-Górecki wrote:
> Simon, can you take a look at it? We'll probably need to put patched gcc
> to linux-dom0-updates repository (if newer Fedora has patched gcc and
> it's possible to build that src.rpm on older Fedora), or add separate
> repository with patched gcc - then probably indeed based on patches from
Just chiming in, but I believe that the Fedora 26 and 27 Updates
repositories has gcc 7.3 now, which has Retpoline support. But if
backporting to FC23/25, I *think* glibc would also need to be upgraded,
if 7.3 won't compile against the stock glibc found in FC23 and 25.
Backporting gcc 7.3 to FC23 may also need a few more additional packages
to be upgraded in the toolchain, although I haven't tried it myself.
I don't know if this helps, but I *have* tried installing FC27 Updates
rpms in an FC25 AppVM and it works fine, at least for compiling kernels.
There may be some extra packages here that don't absolutely need to be
there, but this is what I installed in an FC25 template cleanly, and if
there were additional dependencies needed by these rpms, the FC25
versions of those packages worked fine:
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