[Wien] ifort bug (with no optimization flags)

[Laurence Marks]

Dear All,

There appears to be a bug in version 11.X of ifort which is not there
in 10.0 if no optimization flags are used. I would suggest the use of
-O2, which appears to be safe and gives the same result (within
numerical error) as gfortran and 10.0 versions. (There is a bug with
-O3 in symmetry which was previously reported by Gerhard Fecher.)

N.,B., while most people will have used some optimization, the
siteconfig script does not include any at least in my version of it.

-- 
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60208, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
Web: www.numis.northwestern.edu
Chair, Commission on Electron Crystallography of IUCR
www.numis.northwestern.edu/
Electron crystallography is the branch of science that uses electron
scattering and imaging to study the structure of matter.