http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47692
--- Comment #17 from John T <jrt at worldlinc dot net> 2012-06-26 15:07:48 UTC --- Thank you for reminding me to submit a follow-up. Yes, blas and lapack test cleanly with gcc and gfortran version 4.6.3. I have since encountered a difficulty with the Octave program involving blas. A section of code in Octave that I think compiles the documentation fails to recognize the values returned by calls to dlamch (?) as valid ieee754 values. I've tried a couple of obtimization settings unsuccessfully. If I can't set flags for dlamch and slamch to produce standard ieee754 values, this too might be worth a bug report. suggested flags?