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KotlinAleksey Zamulla6 min readintermediate

A More Reliable Compilation Scheme for Kotlin Multiplatform Modules

Read on jetbrains.com

Summary

Kotlin 2.5 introduces an experimental separate compilation mode for multiplatform projects that forces common source sets to compile only against metadata KLIBs, aligning compiler errors with IDE analysis and enabling incremental compilation for common code.

  • Enable with `kotlin.kmp.separateCompilation=true` to make common code compile strictly against metadata, matching IDE diagnostics.
  • Common code can no longer call platform‑specific declarations; you must add explicit `expect/actual` declarations.
  • Overload resolution and type inference become deterministic, preventing runtime mismatches caused by platform‑specific overloads.
  • Separate compilation unlocks incremental compilation for common source sets, improving build times.

Kotlin developers building multiplatform libraries or apps need reliable compile‑time checks and faster incremental builds.

6/10
kotlincompilergradlemultiplatformincremental compilation

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