Tracking down errors in the bin/ testers

There are two types of bin/ testers: lapack and blas. The BLAS testers have executable names of the form

   x<pre>l<level>blastst

The BLAS testers test ATLAS against a known-good implementation, so the first thing to do is make sure the error is in ATLAS, and not the known-good implementation. To do this, change your BLASlib back to the default F77 reference BLAS, and if necessary compile them without optimization. and then relink and rerun the test in question. If the error goes away, you have found an error in your known-good library, not ATLAS. If it stays, you have found an error in ATLAS, and you should track it down or report it. See Section 7.5 for information on tracking problems in the LAPACK testers.