Thanks eXpl0it3r for that hint.
But i now compiled each of the extlibs by my self. Now the linker can resolve the symbols correctly. But i have two more questions better said 1 question and 1 problem:
1. the question:
if i download a SFML Visual Studio build, for instance the Visual Studio 2013 build, i allways only have 1 build for the extlbis. I don't understand why only one build? What happens if the extlibs are compiled with the option /MD and the Exectuable with /MDd? Whouldn't appear some symbol conflicts in that case?
2. the problem:
if SFML creates a GLContext i get the fallowing warning message in the contex-check-SFML-function:
Warning: The created OpenGL context does not fully meet the settings that were requested
Requested: version = 1.1 ; depth bits = 0 ; stencil bits = 0 ; AA level = 32 ; core = false ; debug = false
Created: version = 4.5 ; depth bits = 0 ; stencil bits = 0 ; AA level = 16 ; core = false ; debug = false
Why OpenGL can't setup the context correctly?