Android的NDK未定义的引用方法 [英] android ndk undefined reference to a method

问题描述

喜对不起，长的帖子我试图编译一些静态类即jsmn.c，json.c和buf.c哪些是jsmn JSON库从我的 https://github.com/alisdair/jsmn-example/downloads 。

Hi Sorry for the long post I am trying to compile some static classes namely jsmn.c,json.c and buf.c which are part of the jsmn json library I downloaded from https://github.com/alisdair/jsmn-example/downloads.

我编译2 STATIC_LIBRARIES LIB1和json_librrary.lib1具有本地code这是依赖于json_library.Then我想提出两个库到包含共享库
  gnustl_static和LIB1

I am compiling two STATIC_LIBRARIES lib1 and json_librrary.lib1 has native code which is dependent on json_library.Then I am making two libraries into a shared library containing gnustl_static AND lib1

我的文件夹结构如下：

JNI / LIB1 / ANdroid.mk

include $(CLEAR_VARS)
LOCAL_MODULE := json_library
LOCAL_SRC_FILES := /3rdParty/jsmn/json_library.a
LOCAL_SRC_FILES := /3rdParty/jsmn/jsmn.c /3rdParty/jsmn/buf.c /3rdParty/jsmn/log.c /3rdParty/jsmn/json.c 
LOCAL_C_INCLUDES := /3rdParty/jsmn/jsmn.h /3rdParty/jsmn/buf.h /3rdParty/jsmn/log.h /3rdParty/jsmn/json.h 
# Optional compiler flags.
LOCAL_LDLIBS   = -lz -lm
LOCAL_CFLAGS   = -Wall -pedantic -std=c99 -g
include $(BUILD_STATIC_LIBRARY)

  include $(CLEAR_VARS)
  # Module Name
  LOCAL_MODULE    := lib1
  LOCAL_STATIC_LIBRARIES := json_library
  ........
  .......
  ......
  include $(BUILD_STATIC_LIBRARY)

JNI / Android.mk

# Here we give our module name
LOCAL_MODULE    := lib2
# list the static modules included here!!!
LOCAL_STATIC_LIBRARIES :=   gnustl_static  lib1 
....
include $(BUILD_SHARED_LIBRARY)

JNI / Application.mk

APP_MODULES   :=  lib2
# Optimization for release
APP_OPTM := release
#Targets
APP_ABI := armeabi-v7a armeabi

于是LIB1里面我有类调用从名为JSON库 json_tokenise ​​

#include <string.h>
#include <stdio.h>
 #include <stdlib.h>
 #include <jsmn/jsmn.h>
#include <jsmn/json.h>
#include <jsmn/buf.h>

jsmntok_t *tokens=json_tokenise((char *)data);

typedef enum {
START,
WRAPPER,
MESSAGE,
ROUTE,
OBJECT,
ARRAY,
SKIP,
STOP
}parse_state;

我收到以下错误

undefined reference to `json_tokenise(char*)'
collect2: ld returned 1 exit status
make: *** [obj/local/armeabi-v7a/lib2.so] Error 1

**** Build Finished ****

当我看看里面[OBJ /本地/ armeabi-V7A /我可以看到
libjson_library.a liblib1.a libgnustl_static.a 是如何产生的armabi-V7，也未能产生，因为错误的LIB2。

When I have a look inside [obj/local/armeabi-v7a/ I can see libjson_library.a liblib1.a libgnustl_static.a are getting generated for the armabi-v7 and it fails to generate lib2 because of the error.

请帮助或引导我在哪里，我错了我在这花了两天时间，我是新来的NDK。

Please help or guide me where I am going wrong I have spent two days on this and I am new to NDK.

推荐答案

您应该修正 JNI / LIB1 / Android.mk 文件：

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := json_library
LOCAL_SRC_FILES := 3rdParty/jsmn/jsmn.c 3rdParty/jsmn/buf.c 3rdParty/jsmn/log.c 3rdParty/jsmn/json.c 
LOCAL_C_INCLUDES := $(LOCAL_PATH)/3rdParty/jsmn
# Optional compiler flags.
LOCAL_LDLIBS   = -lz -lm
LOCAL_CFLAGS   = -Wall -pedantic -std=c99 -g
include $(BUILD_STATIC_LIBRARY)

如果您之后仍存在问题，请运行 NDK的构建带参数在命令行V = 1 并张贴这个版本和所有 Android.mk 文件的全部内容的完整输出。

If you still have problems after this, please run ndk-build with parameter V=1 on command line and post the full output of this build and full content of all your Android.mk files.

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