On Wed, Mar 2, 2022 at 8:52 AM Richard W.M. Jones <rjones@xxxxxxxxxx> wrote: > > To keep this a bit more specific, we're trying to build coccinelle for > EPEL 9. This requires ocaml [compiler] and a bunch of ocaml packages. > They are mainly in RHEL buildroot. > > The problem we're going to have (which to be fair is a problem > somewhat specific to OCaml linking) is that an alternate OCaml > compiler built for EPEL will have different hash values[1] for core > libraries. > > If we use a different version from the RHEL compiler, say we use > Fedora Rawhide version, then all the hashes will be different. > > If we use the same version as in RHEL, then most hash values will be > the same, but if the compiler flags are even slightly different then > there will be some differences. > > OCaml libraries in RHEL that we do ship (ocaml-libnbd and others) will > not be linkable with code compiled with the EPEL toolchain. > > It's entirely possible we don't care about this, and I maybe even > agree. But also that people using RHEL with EPEL added will get into > weird situations if they try to recompile the virt tools packages. > > Rich. > > [1] Hash values are computed over the modules to prevent linking > incompatible versions: > > $ ocamlobjinfo /usr/lib64/ocaml/unix.cma | grep Unix > Unit name: Unix > 49c6c492a189deeaed5bf77a6793e7fa Unix > > and turned into RPM dependencies: > > $ rpm -qR ocaml | grep Unix > ocaml(Unix) = 49c6c492a189deeaed5bf77a6793e7fa > So why not have the OCaml toolchain exposed in RHEL CRB? It sounds like it would be very beneficial to have it there. -- 真実はいつも一つ！/ Always, there's only one truth! _______________________________________________ epel-devel mailing list -- epel-devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to epel-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/epel-devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
