Unreal Editor won't start on Ubuntu Studio 15.10 (x64)

I’ve been trying to run this program for days now, and I’m getting nowhere with it, and none of the solutions I’ve tried on here have worked.

When I try to start the Editor, it stays at 35% and I get the error:

    [2015.12.14-00.44.58:715][  0]LogOpenGLShaderCompiler:Error: Bad hlslcc header found
    [2015.12.14-00.44.58:716][  0]LogOpenGLShaderCompiler:Error: Bad hlslcc header found! Missing '#'!

I also get this:

[2015.12.14-00.45.53:316][  0]LogModuleManager:Warning: ModuleManager: Module 'PakFile' not found - its StaticallyLinkedModuleInitializers function is null.
[2015.12.14-00.45.53:316][  0]LogModuleManager:Warning: ModuleManager: Module 'SandboxFile' not found - its StaticallyLinkedModuleInitializers function is null.

I’m using an AMD card and the latest fglrx driver, if that makes a difference…

What do I do?

Don’t use clang 3.7. Use 3.5 to compile ue4