On Tue, Nov 09, 2021 at 09:04:40AM +0000, Richard W.M. Jones wrote: > Previously: > https://listman.redhat.com/archives/libguestfs/2020-March/msg00063.html > https://listman.redhat.com/archives/libguestfs/2017-September/msg00203.html > > Our current minimum version across projects is 4.03. > > We still use "noalloc" in a few places which causes this warning: > > ocamlopt.opt -warn-error +A-3 -c NBDKit.ml -o NBDKit.cmx > File "NBDKit.ml", line 155, characters 0-70: > 155 | external set_name : string -> unit = "ocaml_nbdkit_set_name" "noalloc" > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Alert deprecated: [@@noalloc] should be used instead of "noalloc" > > I just noticed now that this change was made in 4.03 -- I will go > ahead and fix this everywhere today. > > Should we move to a newer minimum version? If we moved to 4.07 then > we could also get rid of the warnings about Pervasives (replaced by > Stdlib), eg: > > File "std_utils.ml", line 329, characters 26-44: > 329 | let sort_uniq ?(cmp = Pervasives.compare) xs = > ^^^^^^^^^^^^^^^^^^ > Alert deprecated: module Stdlib.Pervasives > Use Stdlib instead. > > However 4.07 was only released in 2018, and this would mean removing > RHEL 7 compatibility (officially -- it's sort of unofficially not > supported already). More irritatingly, FreeBSD is stuck on 4.05.
Note both libvirt and QEMU have explicitly dropped RHEL-7 as a supported build platform[1], under the rule that platforms are dropped 2 years after the new major version is released. It has been > 2 years since RHEL-8 GA, so they dropped RHEL-7. IOW even if new libguestfs can build on RHEL-7, you'll be stuck with old libvirt and QEMU. > Here are the common distros and versions (< 4.07 marked with '*'): > > Arch (Extra) OCaml 4.12 > Debian stable OCaml 4.11 > Debian testing OCaml 4.11 > Fedora 31 OCaml 4.08 > Fedora 35 OCaml 4.12 > FreeBSD (ports) OCaml 4.05 * > OpenSUSE OCaml 4.13 > RHEL 7 OCaml 4.05 * > RHEL 8 OCaml 4.07 > RHEL 9 OCaml 4.11 > Ubuntu 16.04 OCaml 4.02 * Ubuntu 16.04 is explicitly dropped by both QEMU and libvirt too a long time ago. It falls under both the 2 year cut off rule, an the maximum of two major releases in concurrently rules. NB, QEMU/libvirt only look at Ubuntu LTS releases for cutoffs > Ubuntu 18.04 OCaml 4.05 * > Ubuntu 20.04 OCaml 4.08 > Ubuntu 21.04 OCaml 4.11 > > And here are the release dates of the OCaml compiler: > > OCaml version Release date > 4.02 2014-08 > 4.03 2016-04 > 4.04 2016-11 > 4.05 2017-07 > 4.06 2017-11 > 4.07 2018-07 > 4.08 2019-06 > 4.09 2019-09 > 4.10 2020-02 > 4.11 2020-08 > 4.12 2021-02 > 4.13 2021-09 Regards, Daniel [1] https://www.qemu.org/docs/master/about/build-platforms.html https://libvirt.org/platforms.html -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| _______________________________________________ Libguestfs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/libguestfs
