Transitive AOT Compilation

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What do we want to AOT-compile?

Just some a few things
- For the Interop case
- Or to shorten build times
- Not currently supported
Everything
- For the "Application delivery", "Syntax check", and "reflection warnings" cases
- Currently supported by clojure.core/compile

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Why is AOT-compilation transitive?
- Clojure does not support separate compilation
  - All symbols must resolved at compile time
- compile-files is a boolean
The effects of transitive compilation when AOT-comipiling a namespace "A"
- When namespace A loads namespace B within the same project
  - Namespace B is AOT-compiled and emitted
- When namespace A loads library C from external JAR
  - Library C's namespaces are AOT-compiled and emitted alongside A's
Work-arounds
- Build tools: filter unwanted .class files from JAR
  - Ant, Maven, scripting
  - Clojure itself does this, e.g. "slim" JAR
  - Tedious
  - Not commonly used
  - Wastes time during builds to AOT-compile things which will be deleted
- Write Java
  - Fairly common

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