Le 13/06/2016 21:54, Pavel Sanda a écrit :
Guillaume Munch wrote:
Starting from 2.3, LyX will require a C++11 compiler, and g++ 4.6 fails
(it seems) at a feature as elementary as generating a default move
constructor, even when told so explicitly (which we cannot really blame
it for, given that it does not claim C++11 compliance in the first
place). Moreover, the only distribution release that is currently stuck
with g++ 4.6 is (to my knowledge) Ubuntu 12.04LTS, which will no longer
be around by the time 2.3 ships (unless a miracle happens), and which
offers another compiler more respectful of C++11. On the other hand,
what reasons do we have for supporting g++ 4.6?
If you really need a temporary workaround until you get to migrate your
work environment, (and you do not want to/can use clang,) you could keep
a local series of fixes. I imagine that for your current sort of problem
(as far as I understand, because I do not have access to g++ 4.6 to test
my theory), you just need manual definitions of move constructors and
assignment operators. For e87febd0 in particular, however, it is easier,
because it should be safe to just revert it locally, given that this is
an isolated change.
Thanks for summarizing.
I can confirm that reverting e87febd0 makes master compilable again with 4.6.
I am not in charge for the machines around me and given 12.04 LTS ends up
2017-04 I don't expect any migration happening soon :)
So I guess the bad news is I can't quickly bisect what's going on 32 cores
anymore, the good news is I'll get more real work done :)
Thank you Pavel for your understanding. I hope the inconvenience is
temporary.
So is there a consensus that g++ 4.8 is a reasonable minimum version to
support?
