Re: manywarnings for C++

[Bruno Haible]

Hi Reuben,

> For reference, these versions do not address this request from Bruno:

I've now addressed this issue. I hope you'll find the new code structure
more systematic.

Here's how I see the status / needed tweaks on your patches:
  - warnings.m4: No change needed any more.
  - manywarnings.m4: define gl_MANYWARN_ALL_GCC(C++) instead of 
gl_MANYWARN_ALL_GXX.
  - g++-warning.spec: Looks OK to me. I trust that your C++ experience is
    fresher than mine (I learned C++ in 1997).
Do you agree?

Bruno