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Add KernelPackage, source_roots and shared_memory_fits - #118
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This was referenced Oct 27, 2026
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The kernel build settings that picnic, simgeometry, beamtracer and mpifield each copied (
kernels/_build.py,_metal.py,compile.py) move here.xp.kernels.KernelPackage(name): the package'sPyccelCacheand theKernel.from_folderoptions shared by its kernel folders (host_suffix="_pyccel",dispatch="arrays",block_size=256,n_threads_from="last_axis"), withfrom_folder(package, **overrides)andmetal_kernel(...)(float32MetalKernels with zeroed outputs).xp.kernels.source_roots(*packages): source roots of installed packages, forinclude_dirsof a CUDA kernel that includes another package's header.xp.cuda.shared_memory_fits(num_values, itemsize=8): whether a per-block buffer fitsDEFAULT_SHARED_MEMORY_PER_BLOCK.Tests in
tests/unit/test_kernel_package.py, docs inkernels/dispatch.md. Unit suite: 758 passed.The four packages switch over in their own
kernel-packagePRs, which need this ondevelfirst.