How to use libiconv in NDK now?

Question

I found 2014 article, do these in Android Studio project:

cpp add this:

extern "C"{

include <iconv.h> }

android.mk add this:

LOCAL_WHOLE_STATIC_LIBRARIES += android_support

include $(BUILD_STATIC_LIBRARY)

$(call import-module, android/support)

then you can use libiconv function, but now android.mk has replaced by CMakeLists.txt, how to do with CMakeLists.txt to do the same thing?