cmake/vcpkg can't locate MagnumPlugins::AssimpImporter

[TimYorke]

After using vcpkg to install magnum and magnum-plugins[*] packages, the CMakeLists.txt line find_package(MagnumPlugins REQUIRED AssimpImporter) was failing.

I searched my vcpkg folder for Assimpimporter.lib and could only find them (rel and dbg) was in a sub-directory of the vcpkg/buildtrees folder. The exact location of the release version was vcpkg\buildtrees\magnum-plugins\x64-windows-rel\Release\lib\magnum\importers\AssimpImporter.lib

My workaround was to copy the vcpkg\buildtrees\magnum-plugins\x64-windows-rel\Release\lib\magnum folder to vcpkg\installed\x64-windows\lib\magnum

[mosra]

Hi, in case of dynamic plugins (which is the default when you build a dynamic Vcpkg package), this is intentional -- the plugins are found and loaded at runtime and thus there's no need for any find_package(MagnumPlugins ...). Vcpkg copies the relevant *.dlls into your executable directory and Magnum's plugin manager will look there at runtime. OTOH in case of a static build the plugins need to be explicitly found and linked, and in that case the *.lib files will be installed appropriately.

If I remember correctly, we had to explicitly ignore the *.lib files to avoid Vcpkg autolinking magic getting confused.

Relevant docs about plugin usage here.