[EMSUSD-2133] Remove Boost

[hamedsabri]

Hi @seando-adsk

I was looking at your 24.11 changes and noticed this comment.

if(BUILD_MAYAUSD_LIBRARY AND (USD_VERSION VERSION_GREATER_EQUAL "0.24.11"))
    # In USD v24.11 Pixar USD has completely removed Boost.
    # However MayaUsd is still using a few of the Boost components, so
    # when using USD v24.11 (or greater) we need to find Boost ourselves
    # (from the USD build, since Boost is still required for OpenImageIO).
    if(NOT DEFINED ENV{BOOST_ROOT})
        set(ENV{BOOST_ROOT} ${PXR_USD_LOCATION})
    endif()

    find_package(Boost REQUIRED COMPONENTS headers)
endif()

The remaining dependencies to boost can be easily removed and we don't need to hang on to boost anymore. I don't have a CL to share my branch but it should be fairly straightforward change.

Changes:

maya-usd\CMakeLists.txt ---> remove line 260-270
maya-usd\lib\mayaUsd\CMakeLists.txt ---> remove line 259
maya-usd\lib\mayaUsd\fileio\shaderReader.cpp ---> std::optional
maya-usd\lib\mayaUsd\fileio\shaderReader.h ---> std::optional
maya-usd\lib\mayaUsd\fileio\shading\shadingModeUseRegistry.cpp ---> converter.value() line 603 and 606
maya-usd\lib\mayaUsd\python\wrapPrimReader.cpp ---> std::optional line 232 and 233
maya-usd\lib\mayaUsd\render\pxrUsdMayaGL\sceneDelegate.cpp ---> remove line 59
maya-usd\lib\mayaUsd\render\vp2RenderDelegate\material.cpp ----> return std::hash<std::string_view>{}(std::string_view(s.asChar(), s.length())); line 2031
maya-usd\lib\mayaUsd\utils\selectability.cpp ---> using SelectabilityCache = TfHashMap<UsdPrim, Data, TfHash>; line 32
maya-usd\lib\mayaUsd\utils\util.cpp ---> std::size_t operator()(const float& value) const { return std::hash<float>{}(value);} line 1042
maya-usd\lib\usd\translators\shading\mtlxConverterReader.cpp ---> std::optional

[seando-adsk]

Thanks, @hamedsabri I'll have a look. @santosg87 Can you log a new JIRA item to look into removing our last Boost dependencies.

Sean

[santosg87]

Logged [EMSUSD-2133] to track this. :)