OpenVDB Core Library Hard dependency on Boost

[jhenriques]

Hi all,

I'm trying to build a minimal version of OpenVDB. I configured it to not include boost. Here is the cmake line:

cmake .. -GXcode -DOPENVDB_BUILD_BINARIES=OFF -DOPENVDB_CORE_SHARED=OFF -DOPENVDB_USE_DELAYED_LOADING=OFF -DUSE_STATIC_DEPENDENCIES=ON -DBUILD_SHARED_LIBS=OFF

But then I get a build error here:

openvdb/openvdb/openvdb/math/Math.h

Line 13 in 2caed72

#include <boost/numeric/conversion/conversion_traits.hpp>

So, I guess the current version for OpenVDB Core Library actually depends on boost but it's not stated anywhere?

[Idclip]

Hi @jhenriques,

We are working on stripping out the boost dependency entirely, but yes it is still required (as of VDB 10.X). We have our dependency requirements listed here:

https://www.openvdb.org/documentation/doxygen/dependencies.html

It looks like this has been incorrectly updated to imply that boost is optional for the core library. I'll fix this documentation.

edit: Ah, looks like theres a deeper issue here. The updates to VDB 10's CMake to disable delay loading incorrectly remove the entirety of the boost dependency. @danrbailey this looks like a mistake? I'm not sure how the CI is passing, maybe the system boost is being picked up

[Idclip]

#1565 fixes our build system and documentation (which we will re publish)

[bpmckinnon]

Hello, I wanted to check on the progress of this one. I've done a test with std::any vs boost::any and they seem to have a 1:1 mapping and I was able to replace them without issue (limited testing). It seems like a reasonable change too given that OpenVDB is minimum c++17. The conversion_traits is confounding me a bit, but it looks like it's the last remaining required link to boost.