[v3] Handle different versions of Solaris 8 <iso/math_iso.h>, <iso/stdlib_iso.h>

[Paolo Carlini]

Hi,

> exactly: just g++ -D__cplusplus=1 or something.

Irrespective of what the Standard strictly says, I think the latter would only make sense if it would allow the user to return, consistently, to the pre-4.7 behavior, for compatibility reasons or something. Is it the case? Is the above enough for that? Or some of the changes which went in are effective anyway even if __cplusplus is reverted by hand to 1? I think this is the question deciding what we really want to do.

Paolo