Messages in this thread | | | Subject | Re: [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6? | From | Suzuki K Poulose <> | Date | Tue, 25 Apr 2017 10:22:23 +0100 |
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On 16/04/17 20:52, Kees Cook wrote: > Was there a conclusion to this discussion? I didn't see anything > definitive in the thread... > > Notes below... > > On Fri, Dec 16, 2016 at 3:14 AM, Arnd Bergmann <arnd@arndb.de> wrote: >> [Fixed linux-arm-kernel mailing list address, sorry for the duplicate, >> I'm not reposting all the ugly patches though, unless someone really >> wants them, https://lkml.org/lkml/2016/12/16/174 has a copy] >> >> On Friday, December 16, 2016 11:56:21 AM CET Arnd Bergmann wrote: >>> I had some fun doing build testing with older gcc versions, building >>> every release from 4.0 through 7.0 and running that on my randconfig >>> setup to see what comes out. >>> >>> First of all, gcc-4.9 and higher is basically warning-free everywhere, >>> although gcc-7 introduces some interesting new warnings (I have started >>> doing patches for those as well). gcc-4.8 is probably good, too, and >>> gcc-4.6 and 4.7 at least don't produce build failures in general, though >>> the level of false-positive warnings increases (we could decide to turn >>> those off for older compilers for build test purposes). >>> >>> In gcc-4.5 and below, dead code elimination is not as good as later, >>> causing a couple of link errors, and some of them have no good workaround >>> (see patch 1). It would be nice to declare that version too old, but >>> several older distros that are still in wide use ship with compilers >>> earlier than 4.6: >>> >>> RHEL6: gcc-4.4 > > This appears to have support until July 31, 2018. (Though it's using a > 2.6 kernel.) > >>> Debian 6: gcc-4.4 > > This went fully unsupported on Feb 29, 2016. > >>> Ubuntu 10.04: gcc-4.4 > > This went fully unsupported on Apr 30, 2015. > >>> SLES11: gcc-4.3 > > General support ends Mar 31 2019, fully unsupported 31 Mar 2022. (And > like RHEL6 is using a 2.6 kernel.)
fyi, SLES11 upgraded to kernel 3.0, in SP2.
https://www.novell.com/support/kb/doc.php?id=3594951
Cheers Suzuki
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