Android studio not finding std c++ headers using ofxPoco

I am working with the current master as of today and when I try to add ofxPoco to a project I get a lot of errors, mostly related to this:

 error: no type named 'string' in namespace 'std'
        Exception(const std::string& msg, int code = 0);

The compile stops as there are too many errors, but here is some more verbose output:

/Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:74:32: error: unknown type name 'string' explicit logic_error(const string&); ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:91:34: error: unknown type name 'string' explicit runtime_error(const string&); ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:106:59: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit domain_error(const string& __s) : logic_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:116:63: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit invalid_argument(const string& __s) : logic_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:126:59: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit length_error(const string& __s) : logic_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:136:59: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit out_of_range(const string& __s) : logic_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:146:58: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit range_error(const string& __s) : runtime_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:156:61: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit overflow_error(const string& __s) : runtime_error(__s) {} ^ /Users/fredrodrigues/Library/Android/sdk/ndk/android-ndk-r15c/sources/cxx-stl/llvm-libc++/include/stdexcept:166:62: error: unknown type name 'string' _LIBCPP_INLINE_VISIBILITY explicit underflow_error(const string& __s) : runtime_error(__s) {}

If I remove ofxPoco from my addons.mk file then I can compile and run the apps on my device or simulator.

I am using Android studio 3.14 and android-ndk-r15c as advised.

Start by reproducing the ofxPoco build with the Android Studio and android-ndk-r15c setup described, then inspect the project's addons.mk configuration and the reported libc++ errors. Done means an Android project using ofxPoco compiles and runs without removing the addon from addons.mk.