The upstream CMake-selected CPU library uses the built-in generic Fourier transform backend, double precision and pinned MPICH. OpenMP is disabled. The example adapts the author-provided complex FFT example, initializes exactly one MPI process with self/shared-memory UCX transports, transforms an 8-by-6-by-4 complex impulse, independently checks that all forward coefficients equal one, and verifies inverse reconstruction after normalization. J1 covers the multidimensional Fourier transform. Multiple MPI processes and distributed performance are not verified. Local exports need compatible MPI development libraries and locally appropriate include/link flags. BSD-3-Clause notices are retained.
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Build record verified 2026-10-30.
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Reviewed procedures
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The upstream CMake-selected CPU library uses the built-in generic Fourier transform backend, double precision and pinned MPICH. OpenMP is disabled. The example adapts the author-provided complex FFT example, initializes exactly one MPI process with self/shared-memory UCX transports, transforms an 8-by-6-by-4 complex impulse, independently checks that all forward coefficients equal one, and verifies inverse reconstruction after normalization. J1 covers the multidimensional Fourier transform. Multiple MPI processes and distributed performance are not verified. Local exports need compatible MPI development libraries and locally appropriate include/link flags. BSD-3-Clause notices are retained.