add support for multiple platforms #3
Merged
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Fixes #2
Description of Changes
Adds support for multiple platforms. Multiple platforms are supported constructing dispatch tables for all platforms, then selecting the correct dispatch table at runtime based on the passed-in dispatchable object.
Note that the previous single-platform-only behavior can still be selected via a CMake option and is likely to perform better if only a single platform is needed.
Added CI testing for both configurations.
Testing Done
Wrote a tester app that called extension functions from multiple platforms on a system with multiple platforms.