Skip MNN export for Raspberry Pi and NVIDIA Jetson (#17292)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>

ultralytics/engine/exporter.py

@@ -77,6 +77,7 @@ from ultralytics.utils import (
     ARM64,
     DEFAULT_CFG,
     IS_JETSON,
+    IS_RASPBERRYPI,
     LINUX,
     LOGGER,
     MACOS,
@@ -244,6 +245,8 @@ class Exporter:
                 "WARNING ⚠️ INT8 export requires a missing 'data' arg for calibration. "
                 f"Using default 'data={self.args.data}'."
             )
+        if mnn and (IS_RASPBERRYPI or IS_JETSON):
+            raise SystemError("MNN export not supported on Raspberry Pi and NVIDIA Jetson")
         # Input
         im = torch.zeros(self.args.batch, 3, *self.imgsz).to(self.device)
         file = Path(