On 10/24/14 11:31, "Paweł Hajdan, Jr." wrote:
On 10/24/14 4:31 PM, Anthony G. Basile wrote:
I've update the c++ news item for your consideration.  I incorporated
suggestions, in particular a note about incompatibility between c++11
compiled with different version of gcc differing in minor number (eg 4.7
and 4.8).

Thanks, I think this is an improvement.

I'd still prefer an explicit mention that having gcc-4.7 and 4.8
installed simultaneously leads to known breakages, especially if 4.7 is
the active gcc version. The text of the news item implies this, but it's
just not obvious.

Also consider explicitly mentioning
<https://bugs.gentoo.org/show_bug.cgi?id=513386>. Obviously this
wouldn't be a complete list of issues, but from the CC list it's a
pretty common bug.


I agree, this bug is an example of the issues we'll have to face moving forward with 4.8/4.9 and c++. I can reference it.

If in doubt, consider this question: what would be bad about including
the info I suggested above?

You don't need to convince me. Its a good example. There's no particular reason I didn't mention it.


Paweł


So I don't have to keep email the entire item to the list, how about just adding it as follows:

"Nor is c++11 code compiled with gcc-4.7 ABI-compatible with c++11 compiled with 4.8, and vice versa. An example can be see in ref. [2]"

Ref.
[2] https://bugs.gentoo.org/show_bug.cgi?id=513386


--
Anthony G. Basile, Ph. D.
Chair of Information Technology
D'Youville College
Buffalo, NY 14201
(716) 829-8197

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