APP_STL gnustl_static is no longer supported

[elix182]

When I try to use the build.py script or the ndk-build -j 2 command I get the error:

Library/Android/sdk/ndk-bundle/build/core/add-application.mk:178: *** Android NDK: APP_STL gnustl_static is no longer supported. Please switch to either c++_static or c++_shared. See https://developer.android.com/ndk/guides/cpp-support.html for more information. . Stop.

I tried changing the Application.mk file and replacing the gnustl_static with c++_static and I get a compilation error.

I cloned the repo recursively as the README said and the envsetup script exectuted successfully.

Is there something I'm not doing?
I'm using NDK (Side by side) 21.0.6113669 on macOS 10.15.2

[ReeseL]

android-ndk-r19c my Application.mk set
APP_STL := c++_static
APP_CPPFLAGS := -frtti -fexceptions -fpermissive -std=c++11 -w -Wno-narrowing
APP_ABI := armeabi-v7a
APP_PLATFORM := android-21
NDK_TOOLCHAIN_VERSION := clang
#APP_CFLAGS+=-DDLIB_NO_GUI_SUPPORT=on
#APP_CFLAGS+=-DDLIB_PNG_SUPPORT=off
APP_CFLAGS+=-DDLIB_JPEG_SUPPORT=off
APP_CFLAGS+=-DDLIB_JPEG_STATIC=off

[ab503044120]

android-ndk-r19c my Application.mk set
APP_STL := c++_static
APP_CPPFLAGS := -frtti -fexceptions -fpermissive -std=c++11 -w -Wno-narrowing
APP_ABI := armeabi-v7a
APP_PLATFORM := android-21
NDK_TOOLCHAIN_VERSION := clang
#APP_CFLAGS+=-DDLIB_NO_GUI_SUPPORT=on
#APP_CFLAGS+=-DDLIB_PNG_SUPPORT=off
APP_CFLAGS+=-DDLIB_JPEG_SUPPORT=off
APP_CFLAGS+=-DDLIB_JPEG_STATIC=off

did you build success . i can`t build success .because opencv 3.1.0 depend on gnustl,