Re: c++11

[David Holland <dholland-pkgtech%netbsd.org@localhost>]

On Fri, Nov 04, 2016 at 11:32:03PM +0000, Taylor R Campbell wrote:
 >    On Fri, Nov 04, 2016 at 07:43:43PM +0100, Joerg Sonnenberger wrote:
 >    > The real problem is that it doesn't solve the problem of mixing runtime
 >    > libraries. In the GCC of GCC 5.1+, you even end up with broken ABI
 >    > differences when using -std=c++11 vs not.
 >    
 >    Do you have a suggestion how to handle this then?
 > 
 > Sounds like the problem is if two libraries use c++11, and one of them
 > is happy with GCC 4.9 but the other needs GCC 5.1, pkgsrc will build
 > the first with GCC 4.9 and the second with GCC 5.1 and then they will
 > fail to work together in the same address space.
 > 
 > Is that right?  If so, it sounds like having logic, as we do now, that
 > works per-package to choose a C++ compiler is no good, and instead we
 > need to choose a C++ compiler for an entire set of packages at once to
 > satisfy them all.

This problem also exists with native vs. pkgsrc versions of X
libraries.

That is to say, it would be good to come up with a scheme for dealing
with this kind of nonlocal reasoning...

-- 
David A. Holland
dholland%netbsd.org@localhost