I am building edyn as part of my project and am using the highest warning level and had to basically do this to silence all the warnings coming from edyn.
Maybe you should take a look at them when you have a chance.

if(MSVC)
    add_compile_options(/wd4244 /wd4100 /wd4996 /wd4701 /wd4305 /wd4267 /wd4127 /wd4456 /wd4458)
endif()

add_subdirectory(edyn)

P.s sorry for the multiple issues. I am enjoying the library very much and am trying to integrate it in a game engine.