ndk-build for jsoncpp always giving one error

Issue

Pre-requisites : I am using Android Studio 2.1.2

I have downloaded source of jsoncpp from following link

https://github.com/open-source-parsers/jsoncpp

I have already checked following SO thread , not getting proper solutions :

LOCAL_MODULE_FILENAME should not include file extensions i get this error each time i run ndk-build in terminal

Using JsonCpp on X-Cross platform library

My common Android.mk is as follows:

LOCAL_PATH : $(call my-dir)

#JsonCpp lib

include $(CLEAR_VARS)

LOCAL_MODULE : jsoncpplib

include $(LOCAL_PATH)/jsnlib/Android.mk

LOCAL_STATIC_LIBRARIES : jsnlib

LOCAL_LDLIBS     + -llog -ldl

include $(BUILD_SHARED_LIBRARY)

With code for building some other libraries too , which is working fine.

My jsoncpp’s Android.mk is as follows

LOCAL_PATH : $(call my-dir)

include $(CLEAR_VARS)

LOCAL_C_INCLUDES : $(LOCAL_PATH)/jsnlib/include/json/*.h

FILE_LIST + $(wildcard $(LOCAL_PATH)/jsnlib/src/lib_json/*.cpp)

LOCAL_SRC_FILES : $(FILE_LIST:$(LOCAL_PATH)/%%)

LOCAL_MODULE : jsnlib
LOCAL_MODULE_FILENAME: libjsnlib

include $(BUILD_STATIC_LIBRARY)

When I do ndk-build always getting following error

Android NDK: jni/jsnlib/Android.mk:jsnlib: LOCAL_MODULE_FILENAME should not include file extensions
Android NDK: jni/jsnlib/Android.mk:jsnlib: LOCAL_MODULE_FILENAME must not contain a file extension

Solution

What happens here is that while you’re in the middle of defining your jsoncpplib module you include another makefile, which contains its own module definition:

include $(CLEAR_VARS)
LOCAL_MODULE : jsoncpplib
include $(LOCAL_PATH)/jsnlib/Android.mk
LOCAL_STATIC_LIBRARIES : jsnlib
LOCAL_LDLIBS     + -llog -ldl
include $(BUILD_SHARED_LIBRARY)

You should move the inclusion of the other makefile to above the where you’re doing CLEAR_VARS:

include $(LOCAL_PATH)/jsnlib/Android.mk

include $(CLEAR_VARS)
LOCAL_MODULE : jsoncpplib
LOCAL_STATIC_LIBRARIES : jsnlib
LOCAL_LDLIBS     + -llog -ldl
include $(BUILD_SHARED_LIBRARY)

Also, LOCAL_MODULE_FILENAME: libjsnlib seems redundant, since LOCAL_MODULE : jsnlib should result in the same library name.

Answered By – Michael

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