V3 PATCH: #undef some C99 math macros in <cmath>

[Gabriel Dos Reis]

Nathan Myers <ncm@nospam.cantrip.org> writes:

[...]

| Where does this leave us?  Putting the extra symbols in std::iso_c99::
| is probably safe.  Providing something like
| 
|   #ifdef _ISO_C99_SOURCE
|     namespace std { using namespace ::std::iso_c99; }
|   #endif
| 
| so that users can deliberately choose to import the symbols to std::
| seems to make things easier on some people, at some acknowledged risk.    

This is a separate issue but I don't know how to solve the clog
issue.  Perhaps in Copenhaguen, someone will enlighten me...

-- Gaby