Xcode 7 does not build ios swift project with c++ framework

I can't build project with a new version of the opencv 3.0.0 framework (version 2 DID NOT have this problem).

Xcode 7 does not compile c++ sources as c++.

Here's the simplest setup that is not building:

1. Download the 3.0.0 framework from here http://netix.dl.sourceforge.net/project/opencvlibrary/opencv-ios/3.0.0/opencv2.framework.zip

2. Create the simplest ios project with Swift language.

3. Drag-and-drop the framework to the project.

4. Create the `Objective-C++` source and headers and add them to the project.

5. Create the bridging header.

Here's the setup:

http://i.stack.imgur.com/vWp0X.png

http://i.stack.imgur.com/nQi8C.png

6. Build.

And here's what the compiler says:

opencv2.framework/Headers/core/base.hpp:49:4: error: base.hpp header must be compiled as C++

http://i.stack.imgur.com/Ak69F.png

Why is that? I've got the `.mm` file and it is supposed to compile as the Objective-C++ source.