#5516: gmp-mpir-0.9: build failure inside kvm 64 bit virtual machine
----------------------+-----------------------------------------------------
 Reporter:  tornaria  |       Owner:  mabshoff  
     Type:  defect    |      Status:  new       
 Priority:  major     |   Milestone:  sage-3.4.2
Component:  build     |    Keywords:            
----------------------+-----------------------------------------------------

Comment(by tornaria):

 The issue is fixed for me in gmp-mpir-1.1.spkg as installed from
 http://sage.math.washington.edu/home/mabshoff/release-cycles-3.4.1/rc4
 /gmp-mpir-1.1.spkg.

 I installed it with {{{sage -i URL}}} on top of sage-3.4, inside a kvm
 with ''no'' {{{-cpu}}} command line option, and it works fine. The host is
 set to x86_64-unknown-linux-gnu, which is the proposed workaround.

 For the record, note that compiling mpir with x86_64 default is not
 optimal for a core2, hence it is strongly recommended that one uses a
 {{{-cpu}}} command line option for kvm like
 {{{
 -cpu qemu64,family=6,model=15,+ssse3
 }}}
 This works with kvm-72 as shipped with debian. For kvm-84, on a penryn
 (core 2 quad q9550) I'm actually using
 {{{
 -cpu core2duo,model=23,+ssse3,+lahf_lm
 }}}
 which should be slightly better.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5516#comment:4>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of 
Reinventing the Wheel

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