Re: Another possible LTO failure in guestfish (or maybe readline)

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On Fri, 2020-07-31 at 19:26 +0100, Richard W.M. Jones wrote:
> On Fri, Jul 31, 2020 at 12:02:22PM -0600, Jeff Law wrote:
> > Looks like it's in the buildroots now.  Let me know if that doesn't fix the
> > problem.
> 
> Looks as if "ar" is segfaulting again ...
> 
> https://koji.fedoraproject.org/koji/taskinfo?taskID=48288440
> https://kojipkgs.fedoraproject.org//work/tasks/8440/48288440/build.log
> 
> That was built with binutils 2.35-8.fc33
Just an FYI binutils-2.35-9 is in the buildroots.  It's got the fix for the LTO
issue, but does not turn on LTO for binutils itself (that'll be in the -10
build).

I've confirmed that the -9 build will correctly build binutils-2.35-10.  I've
also confirmed that the -9 build will correctly build libguestfs.

I'm going to take my local -10 build and use that to build libguestfs as an
additional sanity check.

jeff

ps.  I found out why SuSE didn't stumble on these issues.  They disabled LTO in
binutils.  Their ChangeLog says it's just the testsuite, but the implementation
is for the entire build.  I suspect they probably have a few packages that are
either silently broken or where they've turned off LTO due to failures without a
real root-cause-analysis.
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