1 files changed, 20 insertions, 0 deletions
diff --git a/lib/system/coro_detection.nim b/lib/system/coro_detection.nim
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index 000000000..f6c1b5c15
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+++ b/lib/system/coro_detection.nim
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+## Coroutine detection logic
+
+template coroutinesSupportedPlatform(): bool =
+  when defined(sparc) or defined(ELATE) or defined(boehmgc) or defined(gogc) or
+    defined(nogc) or defined(gcRegions) or defined(gcMarkAndSweep):
+    false
+  else:
+    true
+
+when defined(nimCoroutines):
+  # Explicit opt-in.
+  when not coroutinesSupportedPlatform():
+    {.error: "Coroutines are not supported on this architecture and/or garbage collector.".}
+  const nimCoroutines* = true
+elif defined(noNimCoroutines):
+  # Explicit opt-out.
+  const nimCoroutines* = false
+else:
+  # Autodetect coroutine support.
+  const nimCoroutines* = false