XCODE_SCHEME_ENVIRONMENT
------------------------

Specify environment variables that should be added to the Arguments
section of the generated Xcode scheme.

If set to a list of environment variables and values of the form
``MYVAR=value`` those environment variables will be added to the
scheme.

Please refer to the :variable:`CMAKE_XCODE_GENERATE_SCHEME` variable
documentation to see all Xcode schema related properties.
