Compile C++ native activity with NDK

Question

I create Android native activity project based on " native-activity " project in NDK. In this project android_main function is implemented in main.c file and it compiles and run without any issues.

Now I wants to implement some C++ routines in this file and to do that, as a first step I change main.c file to main.cpp and change LOCAL_SRC_FILES entry in Android.mk to main.cpp .

After this change I got following error at the compilation:

make.exe: *** No rule to make target `jni/main.c', needed by `obj/local/arm64-v8a/objs/native-activity/main.o'.  Stop.

Also Android.mk file in this project contain following entries:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := native-activity
LOCAL_SRC_FILES := main.cpp
LOCAL_LDLIBS    := -llog -landroid -lEGL -lGLESv1_CM -lGLESv2
LOCAL_STATIC_LIBRARIES := android_native_app_glue

include $(BUILD_SHARED_LIBRARY)

$(call import-module,android/native_app_glue)

What was the possible cause for this error?

Answer 1

Delete your obj directory from workspace and rebuild. Sometimes eclipse clean is not working and failed to delete obj files.