| 1 |
On 10/20/14 12:53 AM, Anthony G. Basile wrote: |
| 2 |
> GCC 4.7 introduced the new experimental 2011 ISO C++ standard [1], along |
| 3 |
> with |
| 4 |
> its GNU variant. This new standard is not the default in GCC 4.7, 4.8 |
| 5 |
> or 4.9, |
| 6 |
> the default is still gnu++98, but it can be enabled by passing |
| 7 |
> -std=c++11 or |
| 8 |
> -std=gnu++11 to CXXFLAGS. |
| 9 |
> |
| 10 |
> Users that wish to try c++11 should exercise caution because it is not |
| 11 |
> ABI-compatible with c++98. |
| 12 |
|
| 13 |
This seems to focus on the Gentoo user adding -std=c++11 to CXXFLAGS. |
| 14 |
|
| 15 |
Do we consider this #1 problem with gcc-4.8 or 4.7+? |
| 16 |
|
| 17 |
As far as I'm concerned, the big issue is e.g. |
| 18 |
<https://bugs.gentoo.org/show_bug.cgi?id=513386>, where having gcc-4.7 |
| 19 |
and gcc-4.8 installed on the same system (and using gcc-4.7 as the |
| 20 |
active gcc version) is known to be broken. |
| 21 |
|
| 22 |
Another concern I have with the above news item is it might actually |
| 23 |
encourage "crazy" users to add -std=c++11 to CXXFLAGS, even though |
| 24 |
otherwise they wouldn't even know about the flag. |
| 25 |
|
| 26 |
To summarize, my suggestion is to make sure we clearly communicate known |
| 27 |
bugs reported to Gentoo, like example above one. |
| 28 |
|
| 29 |
Paweł |
Archives