http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50190
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2013-02-26 19:23:14 UTC --- On a Core2Duo with '-Ofast' I get 2.51200998D+01 and with '-fprotect-parens -Ofast' 2.50952975D+01. I think the tolerance value for linpk does not make sense: the target is a residual and its value should be 0.0 for a computation without rounding errors. Hence both the target and tolerance values are arbitrary. In top of that, residn = resid/(N*norma*normx*eps) and if resid pass its test, residn should also pass its test. For my tests I have replaced 2.0 with 3.0 to avoid this spurious "failure". I suggest to close this PR as won't fix.
