Hi Janne,
I think, in general, our current system where
-std=gnu means roughly "everything we have implemented so far, except
legacy extensions that break standards conformance" is pretty good.
The problem that I see with implementing this change is stack space,
especially the traditionally limited stack space on some systems with
OpenMP.
We have already seen a few bug reports for this, with the large buffer
that the blocked library version of matmul uses.
If we implement that patch "as is", we will blow up a lot of existing
codes. One problem is that the error messages are bad (segfault)
to mysterious (something that has no apparent relation to the root
cause).
> Now, to play devils advocate with my own patch, one can make the case
> that before making procedures recursive by default we should fix
> -frecursive / -fmax-stack-var-size so that it's robust in the face of
> recursion (and multi-threaded access) and also prevents blowing up the
> stack.
Yes, I think we need to do this.
Regards
Thomas
