OpenCV gnustl conflicts with C ++ _ dlib shared in Android NDK

I am trying to integrate OpenCV and dlib-android into the NDK. I can get OpenCV and dlib to work in separate projects, but the project breaks when they are both integrated.

This is my gradle config for dlib

android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
defaultConfig {
    ...
    externalNativeBuild {
        cmake {
            cppFlags "-std=c++11 -frtti -fexceptions"
            arguments "-DANDROID_PLATFORM=android-16",
                    "-DANDROID_TOOLCHAIN=clang",
                    "-DANDROID_STL=c++_shared",
                    "-DANDROID_CPP_FEATURES=rtti exceptions"
        }
    }
    sourceSets {
        main {
            jniLibs.srcDirs = ["src/main/jniLibs/dlib/libs"]
        }
    }
}
...

      

        
        
        
      

    

When I integrate openCV I get

undefined reference to 'cv :: CascadeClassifier :: detectMultiScale'

The solution, which according to this answer , should have stl asgnustl_shared

dlib with gnustl_shared

gives errors like std::exceptions

not found.

How do I go forward and integrate both?

I tried to recompile OpenCV with the help c++_shared

in CMake but ran into

fatal error: iostream: no such file or #include directory