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Builds Pixar's OpenUSD core libraries and their pxr Python bindings for riscv64, the same configuration upstream publishes as the usd-core wheel: build_usd.py with imaging, MaterialX, examples and tutorials off, so nothing in the wheel touches OpenGL, Vulkan, Metal or X11 - every GPU find_package in cmake/defaults/Packages.cmake sits inside if (PXR_BUILD_IMAGING). There is no usd-core sdist on PyPI, so the workflow builds from the v26.08 tag the way upstream's pypi.yml does, including its dummy-libpython workaround for the manylinux image. The Python bindings need no external Boost: since 24.11 USD vendors its own Boost.Python fork at pxr/external/boost/python, and PXR_USE_BOOST_PYTHON is gone from 26.08 entirely. TBB 2020.3.1 - the only dependency build_usd.py compiles for a core build - needs no help on riscv64: its makefiles fall back to uname -m for the arch name and to lin64 for the export list, and tbb_machine.h picks machine/gcc_generic.h from GCC's builtin atomics. One patch is required, for pxr/base/arch: defines.h stops the build outright with "Unsupported architecture. x86_64 or ARM64 required.", and once that is past, math.h and stackTrace.cpp have the same shape of x86/ARM-only gate.
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… build, vendored pxr_boost::python, one arch patch
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usd-core26.8Compiles OpenUSD's core C++ libraries and their
pxrPython bindings — imaging, MaterialX, examples and tutorials off, so no OpenGL, Vulkan, Metal or X11 is involved. Upstream publishes no riscv64 wheel.Mirrors upstream's
pypi.ymlLinux job, including its dummy-libpythonworkaround andbuild_scripts/pypi/{setup.py,updatePluginfos.py}.Differs from upstream
v26.08tag rather than a branch — there is nousd-coresdist on PyPI.build_usd.pyin the riscv64 manylinux image directly, not upstream'smanylinux_2_28_x86_64Dockerfile.Matrix: cp312/cp313/cp314 — upstream ships cp39-cp314 and no free-threaded wheel, and the vendored
pxr_boost::pythonbindings never declarePy_mod_gil.Testing
pxrsubmodule to exercise the monolithic library.License: Wheel bundles TBB 2020.3.1 (Apache-2.0); upstream ships no licence text for it, so the build adds it.
Patches
0001-Support-riscv64-in-pxr-base-arch.patch—Upstream-Status: To upstream, needs a PR against PixarAnimationStudios/OpenUSD. Without itpxr/base/arch/defines.hfails every translation unit with#error "Unsupported architecture. x86_64 or ARM64 required.", andarch/math.handarch/stackTrace.cppcarry the same x86/ARM-only gates. riscv64-only.Built on cp312, cp313 and cp314; 3 passed, 31
pxrmodules imported.