https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69721
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Definitely invalid. It might have worked before because <math.h> only declared
extern "C" functions, which don't include namespaces in their mangled names,
but the code always had undefined behaviour.
Now that <math.h> is implemented by including <cmath> (which defines extern
"C++" functions where namespaces matter) the undefined code stops working.
That's the problem with undefined code that just happens to work today, it
might stop working at any time.
