Build a static executable

[jbarnoud]

One goal for this server is to be distributable as a single file binary. This means linking OpenMM statically.

This can be done by using the static-lib feature of openmm-sys. However, doing so now raises an exception in OpenMM_XmlSerializer_deserializeSystem that cannot be caught:

Coordinate array built
fatal runtime error: Rust cannot catch foreign exceptions
Aborted (core dumped)

[jbarnoud]

The issue is due to the OpenMM serialization code not being included in the static build upstream. Two things need to be solved for that particular failure to be fixed:

• [ ] the serialisation code must be included in the static build
• [ ] the registerSerializationProxies function must be exposed in the C wrapper; upstream it is called automatically when the shared library is loaded, but this does not work for static builds so we need to be able to call the function manually
• [ ] narupa's code needs to call registerSerializationProxies when it is built with static OpenMM

[jbarnoud]

Another issue is looming with plugins:

• how do we load plugins in the static build?
• how do we pre-build the cuda plugin?