--no-embree seems to *cause* CMake to look for embree

[jcowles]

Description of Issue

When running build_usd.py with --no-embree, I get CMake config failures about not being able to find embree. When I remove this flag, it configures fine.

Steps to Reproduce

Make sure embree is not on your path, then run:

python build_scripts\build_usd.py --build-monolithic --no-ptex --no-embree --no-alembic build_monolithic\

Once prereq's are finished, it will fail on CMake config, complaining about embree.

Remove --no-embree, then it configures USD fine.

System Information (OS, Hardware)

Windows

[jtran56]

Filed as internal issue #150563.