Building helide device fails for CMake 3.18

[griffin28]

When building the latest ANARI SDK with BUILD_HELIDE_DEVICE:BOOL=ON and using CMake 3.18 I get the error below with curl (which does support the required protocols and was manually tested and successfully downloaded the embree file).

However, when using CMake 3.25.1 the ANARI SDK builds successfully. VisIt's automated build scripts currently use CMake 3.18 and are generally several CMake releases behind the current.

[jeffamstutz]

There's now an official source release that contains all the pre-downloaded versions of all the dependencies with it. My hope is that this issue can be worked around by using that source zip release, or at least the new infrastructure for fetching sources by CMake doesn't trigger the same problem you experienced (i.e. CPM is no longer used to get Embree).

Please reopen if you continue to have issues, but this may actually just be an issue with CMake itself. Thanks!