[Wheel-builders] manylinux wheel troubles using C++ and streaming exceptions

[Guilherme Melo]

Hi Vitaly,

I was curious about your problem and I've been able to reproduce it
compiling with gcc 4.8.2 on CentOS5 and gcc 4.8.5 and gcc 4.9.3 on Ubuntu
Also it is not even necessary to pass -std=c++11, the bug happens either
way.

this one exception class and the actual failures are unreasonably difficult
> to simulate in testing, making it difficult, if not impossible, to find all
> occurrences in one’s own code, not to mention 3rd party code that it links
> with.


I don't think there is so many incompatibilities. The libstdc++ shipped by
gcc 5.1.0+ should be backward compatible, but as you found out it is indeed
a bug. As an example, on the company I work for we have hundreds of conda
packages compiled with gcc 4.8.5. Recently we changed to gcc 5.4.0 for our
applications and did not have to rebuild any of the dependencies (actually
we are still compiling the dependencies with 4.8.5)

But regarding your problem I don't see much that can be done until they fix
this:

- Maybe static linking libstdc++?
- Maybe manylinux1 should provide a way to ship libstdc++ with wheels for
such cases?
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