Greetings, I'm emailing after discussion with Wes at AnacondaCon today. I work for Anaconda, and I've recently been trying to package Arrow for Anaconda. The current CMake configuration seems to strongly impose a vendoring/hermetic approach. We find that approach to be difficult to integrate with our system, which relies on package modularity and basically anti-vendoring. Specifically, imposing -Werror in Orc led to always failing builds for Arrow on OSX, and because Arrow vendored Orc through CMake, my only option was to attempt a build, let it fail, and then patch -Werror away for Orc after the failed build, then rebuild. I would like to contribute patches to Arrow's CMake files, and ideally also to Orc's CMake files that will allow us to switch between the hermetic approach, and using externally provided dependencies. Orc would become a separate package for us, and Arrow would depend on it. This brings me to two questions:
1. Is this a welcome change, or should we just carry patches locally? 2. Assuming change is welcome, what is the preferred method for submitting changes? Github PR(s)? Best, Michael
