Consolidate configure scripts

[jakirkham]

Currently there is a top-level configure script generated by autoconf. Typically this is what most builders would use by default, but UCX has a configure-release that is in contrib, which is recommended by the docs. Though there is also a multithreaded release script as well. Plus there are few more configure scripts in the contrib directory.

Would it be possible to consolidate this into a single configure that sets most things up for a performant release build? Perhaps there are still some configure scripts for development that need to hang around in contrib, but this would make it easier for others building and shipping UCX to users to get started.

cc @pentschev @leofang

[yosefe]

@jakirkham to be clear, are you suggesting that the default ./configure will behave the same as ./contrib/configure-release?

[jakirkham]

Yeah that's right. Would that be possible? Or are there other things to consider before approaching such a change?

[shamisp]

@jakirkham It is quite challenging to come up with such config. For example, the most optimal build config enables u-arch optimizations that are not portable across machines. The multi-threaded build enables flows that will not be as optimal for apps that don't care about multithreading, etc. Essentially, the options and configurations that are optimal for one user may not be optimal for another user.

[yosefe]

IMO we can make the default configure closer to configure-release, but it still has to be multi-threaded and without non portable uarch optimizations

[shamisp]

@jakirkham Maybe you can share some details, why you believe this is an issue today. thanks