On Mon, Jul 13, 2015 at 8:40 AM, Eric Martin <e...@ericmart.in> wrote:
> [...] > > *My questions about this:* > CBLAS questions: > What does CBLAS do, and why/when is it necessary? For both ACML 6 and > Eigen, I could not link directly to the library but could with CBLAS. My > understanding is that the BLAS interface is a Fortran ABI, and the CBLAS > provides a C ABI (cdecl?) to BLAS. > Why can't the user link Numpy directly to the Fortran ABI? How are ATLAS > and openBLAS handled? > > AFAIK, the cblas symbols is an interface adapted to the calling conventions of C. This involves things like integer being passed by value instead of by reference. This means that in order to use the FORTRAN symbol care must be taken to pass the arguments the way a FORTRAN function expects (like I said, it is a matter of just tweaking the arguments in the call and using a FORTRAN symbol).
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