Description

After reinstalling assimp via Conan after a while, loading of a GLTF2 file errors out with an error that Draco compression is not supported. This used to work for the same version (though previously we installed it under Conan < 2).

I think with the simplification of the patching in #22047 the part that sets the correct preprocessor definition for draco support got removed (in the unvendor 5.2.x patch):

Without the -DASSIMP_ENABLE_DRACO, the loader will throw the above error.

There is no equivalent code after the patching cleanup, unless I'm missing something. Looking at the build commands for the package in the conan folders, there is also no ASSIMP_ENABLE_DRACO preprocessor symbol defined.

Package and Environment Details

• Package Name/Version: assimp/5.228
• Operating System+version: WSL running Linux Ubuntu 22.04
• Compiler+version: GCC 13
• Conan version: conan 2.8.1
• Python version: Python 3.12.3

Conan profile

[settings]
arch=x86_64
build_type=RelWithDebInfo
compiler=gcc
compiler.cppstd=20
compiler.version=13
compiler.libcxx=libstdc++11
os=Linux

[conf]
tools.cmake.cmaketoolchain:generator=Ninja

Steps to reproduce

Install the assimp package.
Using the assimp package, try loading a gltf2 file with draco compression.

Logs

N/A