"Jeff Squyres (jsquyres)" <jsquy...@cisco.com> writes: > Especially with C++, the Open MPI team strongly recommends you > building Open MPI with the target versions of the compilers that you > want to use. Unexpected things can happen when you start mixing > versions of compilers (particularly across major versions of a > compiler). To be clear: compilers are *supposed* to be compatible > across multiple versions (i.e., compile a library with one version of > the compiler, and then use that library with an application compiled > by a different version of the compiler), but a) there's other issues, > such as C++ ABI issues and other run-time bootstrapping that can > complicate things, and b) bugs in forward and backward compatibility > happen.
Is that actually observed in GNU/Linux systems? I'd expect it either to work or just fail to link. For instance, the RHEL 6 devtoolset-4 (gcc 5) uses the system libstdc++, and the system compiler is gcc 4.4. > The short answer is in this FAQ item: > https://www.open-mpi.org/faq/?category=mpi-apps#override-wrappers-after-v1.0. > Substituting the gcc 5 compiler may work just fine. For what it's worth, not for GNU Fortran, which unfortunately changes the module format incompatibly with each release, or at least most releases. _______________________________________________ users mailing list users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/users
