GLPK compiled with -march=native produces different results

[Domingo Alvarez Duarte]

Hello !

Doing tests with GLPK I noticed that if I compile it with "-march=native 
-g -O2" on a computer with an "i7" processor the solution for several 
files change, the objective function result remain the same but other 
values varies from model to model.

Example dist.mod:

====

     6 rlim[w96]    NU             3             0 3      -11283.2 # 
only -O2
====

     6 rlim[w96]    NU             3             0 3      -11283.1 # 
-O2 -march=native

====

Example mfasp.mod:

====

     1 r[1,2]                      9             1   # only -O2
     2 r[2,3]                      2             1
====

     1 r[1,2]                      1             1   # -O2 -march=native
     2 r[2,3]                     10             1
====


Cheers !