我见过类似的问题undefined reference to std::ios_base::Init::Init()和undefined reference to `std::ios_base::Init::Init()'，但是我不确定情况是否相同。

我正在opencv for android 3.4.7上配置Android Studio 3.5。我通过编辑CMakeList.txt和build.gradle导入了opencv库：

set(opencv_version OpenCV3-android-sdk)

set(OpenCV_STATIC ON)
set(OpenCV_DIR /home/lynx/Android/Proj/${opencv_version}/sdk/native/jni)
find_package(OpenCV REQUIRED)
if (OpenCV_FOUND)
    message(WARNING "opencv libs: ${OpenCV_LIBS}")
else (OpenCV_FOUND)
    message(WARNING "opencv not found!")
endif(OpenCV_FOUND)

target_link_libraries(
        ${OpenCV_LIBS})

sourceSets {
    main {
        jniLibs.srcDirs = ['/home/lynx/Android/Proj/OpenCV3-android-sdk/sdk/native/libs']
    }
}

我的native-lib.cpp是

#include <jni.h>
#include <string>
#include <iostream>
#include <opencv2/opencv.hpp>

using namespace cv;

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_stitch_Mainactivity_stringFromJNI(
        JNIEnv *env,jobject /* this */) {

    std::string hello = "Hello from OpenCV " + (std::string)CV_VERSION;

    return env->NewStringUTF(hello.c_str());
}

构建项目时，它显示了undefined reference文件中的许多opencv错误。用cpp链接器链接c文件似乎不是问题：它调用clang++来完成任务，当不使用opencv时，项目可以成功构建。

是不是因为我没有正确配置opencv？