macOS Deps: NumPy: Remove buggy Accelerate framework

Building NumPy from source with default options of builder
causes it to link against Accelerate framework which is buggy and
raises a warning mentioned in [2].
"RankWarning: Polyfit may be poorly conditioned"
Accelerate is deprecated with NumPy 1.20+.[1]

So either we build OpenBLAS in dependencies also and set appropriate
env variables suggested in [1] while building NumPy for it to find
OpenBLAS. Or download NumPy wheel from pip and never allow pip to
build NumPy from source while installing.

After this change, pip wheels are used for NumPy for macOS with x86_64.

[1] https://numpy.org/doc/stable/user/building.html#lapack
[2] numpy/numpy#15947
Reviewed By: #platform_macos, sebbas
Differential Revision: https://developer.blender.org/D10368

build_files/build_environment/CMakeLists.txt

@@ -86,9 +86,14 @@ include(cmake/tbb.cmake)
 include(cmake/openvdb.cmake)
 include(cmake/nanovdb.cmake)
 include(cmake/python.cmake)
+option(USE_PIP_NUMPY "Install NumPy using pip wheel instead of building from source" OFF)
+if(APPLE AND ("${CMAKE_OSX_ARCHITECTURES}" STREQUAL "x86_64"))
+  set(USE_PIP_NUMPY ON)
+else()
+  include(cmake/numpy.cmake)
+endif()
 include(cmake/python_site_packages.cmake)
 include(cmake/package_python.cmake)
-include(cmake/numpy.cmake)
 include(cmake/usd.cmake)
 include(cmake/potrace.cmake)
 include(cmake/haru.cmake)

build_files/build_environment/cmake/python_site_packages.cmake

@@ -28,6 +28,15 @@ ExternalProject_Add(external_python_site_packages
   INSTALL_COMMAND ${PYTHON_BINARY} -m pip install ${SITE_PACKAGES_EXTRA} cython==${CYTHON_VERSION} idna==${IDNA_VERSION} chardet==${CHARDET_VERSION} urllib3==${URLLIB3_VERSION} certifi==${CERTIFI_VERSION} requests==${REQUESTS_VERSION} --no-binary :all:
 )
 
+if(USE_PIP_NUMPY)
+  # Use only wheel (and not build from source) to stop NumPy from linking against buggy
+  # Accelerate framework backend on macOS. Official wheels are built with OpenBLAS.
+  ExternalProject_Add_Step(external_python_site_packages after_install
+    COMMAND ${PYTHON_BINARY} -m pip install --no-cache-dir numpy==${NUMPY_VERSION} --only-binary :all:
+    DEPENDEES install
+  )
+endif()
+
 add_dependencies(
   external_python_site_packages
   external_python