Control: tags -1 pending
On 08/09/2016 07:53 AM, Ximin Luo wrote:
Control: severity -1 serious
I was recommended by multiple people to bump the severity of this bug. Also to clarify that i386
should have no optimisation flags, and not "-msse -msse2". My earlier comment was based
on a misunderstanding of what "i386 doesn't have mmx" meant; sse and sse2 build on top of
mmx.
X
Ximin Luo:
Package: fflas-ffpack
Version: 2.2.1-1
Severity: important
Dear Maintainer,
fflas-ffpack on amd64 was built with "-msse4.1 -mfma -mavx2" as can be seen
from the output of `pkg-config --cflags fflas-ffpack`. This unfortunately makes
it crash on amd64 machines that don't support these instructions, and we are
running into this issue whilst testing SageMath.
Please disable any build options that set optimisations based on autodetection
of the CPU features of the build machine.
It should be OK to hard-code "-mmmx -msse -msse2" for amd64 and "-msse -msse2"
for i386, according to wRAR on #debian-devel. This is somewhat based on
information from [1]. There might be other optimisations you can make, but I
haven't yet done the detailed research for that.
X
[1] https://lists.debian.org/debian-devel-announce/2016/05/msg00001.html
Thanks for your report! I had figured that there was an issue like
this, as both the CI and reproducible build tasks have been failing.
I've disabled the use of these extensions and a new version is in git
[1] awaiting sponsorship.
Doug
[1]
https://anonscm.debian.org/cgit/debian-science/packages/fflas-ffpack.git/commit/?id=88c339f745dc54351d4c437eedd38a5b83dca993
