Red Hat Bugzilla – Bug 22393
gcc 2.96 incorrectly compiles clapack
Last modified: 2007-04-18 12:30:14 EDT
When compiled with gcc 2.96 clapack fails its built in tests.
When compiled with 'kgcc' it doesn't fail these tests.
clapack is a numerical library commonly used for high performance
This looks like a bug in clapack, at least it builds and passes tests just
fine if -fno-strict-aliasing is given to gcc, which most probably means
clapack does some invalid type punning somewhere. I haven't analyzed it
yet where is it doing, so I cannot say this for sure.
GCC 2.96-RH is now too old. If you are able to reproduce similar
problems with contemporary GCC (3.4, 4.0), please reopen.