Compiling with fflas.h can fail when termios.h is also included

[embray]

This is a fairly unusual corner case, but the standard header termios.h defines a macro called B0 that conflicts with the variable named B0 in fflas/fflas_igemm/igemm_kernels.inl. This can happen when compiling any source that happens to include both fflas.h and termios.h (one such case is described here: https://trac.sagemath.org/ticket/21578).

I would suggest simply renaming the variables.

[ClementPernet]

This is terribly annoying that some std package define a macro named B0.
I see no simple way around it else than renaming. This is done in in 346498a .

[embray]

Absolutely agree. Thanks for the quick fix.