[Issue]: rocAL cmake checks MIVisionX for dependency/backend, rather than vx_rpp
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Since Aug 7, 2026.
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Description
In rocAL/CMakeLists.txt, rocAL checks for MIVisionX as a dependency, and also checks MIVisionX's backend to determine if rocAL needs to fallback to CPU.
However, the real dependency is vx_rpp (extension within MIVisionX).
For example, if MIVisionX is built with HIP backend but vx_rpp with CPU backend, then rocAL must be built with CPU backend. But currently, CMakeLists only checks MIVisionX, and so will not detect that rocAL must be built with CPU backend.
vx_rpp is both the required and sufficient check.
The README could also have better documentation on this dependency.
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