Linker errors when cross compiling for Linux

I’m trying to build the Linux dedicated server for our project with the 4.14 branch from GitHub.

I just tried it again with the sources updated to the latest commit (which is e99c9f6 at the time of writing) and it still doesn’t work.

The errors happen during linking immediately after successfully compiling the source.

This time round I did notice a warning when the build command started:

UnrealBuildTool: Using LINUX_ROOT (deprecated, consider LINUX_MULTIARCH_ROOT), building with toolchain 'H:\toolchain\'

I’m using the v7 clang 3.7.0-based toolchain from here: https://wiki.unrealengine.com/Compiling_For_Linux

Maybe there’s something wrong with the build command I’m using.
It did work with 4.13 though:

RunUAT.bat -ScriptsForProject=H:\Game\Game.uproject BuildCookRun -nocompileeditor -nop4 -project=H:\Game\Game.uproject -cook -stage -clientconfig=Development -ue4exe=UE4Editor-Cmd.exe -SKIPEDITORCONTENT -nodebuginfo -targetplatform=Linux -utf8output -build -noclient -server -serverconfig=Development -serverplatform=Linux