Problem running config..

Hi there,
I am currently on the section labelled
Windows Store 8.1 x64 (Windows 8.1 x64 in Visual Studio)
After creating the directories I have the following : FFmpegInterop>ffmpeg>Output>Windows8.1>x64
When I try the following:
$ ../../../configure \

--toolchain=msvc
--disable-programs
--disable-dxva2
--arch=x86_64
--enable-shared
--enable-cross-compile
--target-os=win32
--extra-cflags="-MD -DWINAPI_FAMILY=WINAPI_FAMILY_PC_APP -D_WIN32_WINNT=0x0603"
--extra-ldflags="-APPCONTAINER"
--prefix=../../../Build/Windows8.1/x64
I get the following error:
c99wrap cl is unable to create an executable file.
C compiler test failed.

If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solve the problem.

I have tried updating the ffmpeg file using the following git clone git://source.ffmpeg.org/ffmpeg.git
but I still get the same error?
Is this something I am doing wrong or is there currently a problem?
Thanks

Start by reviewing the configure command in the issue and the config.log produced by configure, then check the FFmpegInterop Windows 8.1 x64 build instructions and the compiler setup. Done means identifying why the c99wrap cl compiler test fails and documenting or applying a verified fix for this configuration.