Question

从CPP文件访问静态库libadd.a。

CPP文件是使用CMakeList.txt编译的，该文件会编译并由应用程序生成libnative-lib.so文件。

更新了CMakeList.txt

**target_link_libraries(
                       native-lib
                       ${log-lib}
                       ${CMAKE_SOURCE_DIR}/libadd.a)**

在native-lib.cpp文件中访问函数add（）

#include <jni.h>
#include <string>
#include "../../../staticLib/files/add.hpp"

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_oncall_myapplication_MainActivity_stringFromJNI(
        JNIEnv* env,
        jobject /* this */) {
    std::string hello = "Hello SUCESSS its 12";

    std::string hello1 = "Hello FAILED it is not 12";

    addition::my::work::abc     Obj;
    Obj.add(5,7);

    if(Obj.add(5,7) == 12)
    {
     return env->NewStringUTF(hello.c_str());
    }
    else
    {
    return env->NewStringUTF(hello1.c_str());
    }

}

尝试构建代码时出错。

构建命令失败。使用参数{--build /home/oncall/Bha/MyApplication3/app/.externalNativeBuild/cmake/debug/x86_64-执行进程/home/oncall/Desktop/Android/Sdk/cmake/3.6.4111459/bin/cmake时出错-target native-lib} [1/1]链接CXX共享库../../../../build/intermediates/cmake/debug/obj/x86_64/libnative-lib.so 失败：：&& / home / oncall / Desktop / Android / Sdk / ndk-bundle / toolchains / llvm / prebuilt / linux-x86_64 / bin / clang ++ --target = x86_64-none-linux-android21 --gcc-toolchain = /主页/ oncall /桌面/ Android / Sdk / ndk-捆绑/工具链/ llvm / prebuilt / linux-x86_64 --sysroot = / home / oncall / Desktop / Android / Sdk / ndk-bundle / toolchains / llvm / prebuilt / linux- x86_64 / sysroot -fPIC -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong-无规范前缀-fno-addrsig -Wa，-noexecstack -Wformat -Werror = format-安全-stdlib = libc ++ -O0 -fno-limit-debug-info -Wl，-exclude-libs，libgcc.a -Wl，-exclude-libs，libatomic.a -static-libstdc ++ -Wl，-build- id -Wl，-警告共享文本-Wl，-致命警告-Wl，-无定义-Qunused参数-Wl，-z，noexecstack -Wl，-z，relro -Wl，-z ，现在-共享-Wl，-soname，libnative-lib.so -o ../../../../build/intermediates/cmake/debug/obj/x86_64/libnative-lib.so CMakeFiles / native- lib.dir / src / main / cpp / native-lib.cpp.o / home / oncall / Desktop / Android / Sdk / ndk-bundl e / toolchains / llvm / prebuilt / linux-x86_64 / sysroot / usr / lib / x86_64-linux-android / 21 / liblog.so ../../../../../libadd.a -latomic -lm &&： /home/oncall/Desktop/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/lib/gcc/x86_64-linux-android/4.9.x / .. / .... / x86_64-linux-android / bin / ld：错误：../../../../libadd.a(add.o）：需要针对'_ZN8addition2my4work3abc5countE'的动态R_X86_64_PC32重定位，它可能在运行时溢出；用-fPIC重新编译 /home/oncall/Desktop/Android/Sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/lib/gcc/x86_64-linux-android/4.9.x / .. / .... / x86_64-linux-android / bin / ld：警告：共享库文本段不可共享 ../../../../ libadd.a（add.o）：add.cpp：function adding :: my :: work :: abc :: getCount（）：error：undefined reference to 'addition :: my :: work :: abc :: count' ../../../../libadd.a(add.o):add.cpp:function adding :: my :: work :: abc ::〜abc（）：错误：未定义对'addition的引用:: my :: work :: abc :: count' ../../../../libadd.a(add.o):add.cpp:function adding :: my :: work :: abc ::〜abc（）：错误：未定义对'addition的引用:: my :: work :: abc :: count' clang ++：错误：链接器命令失败，退出代码为1（使用-v查看调用）忍者：构建停止：子命令失败。

libadd.a的add.cpp

#include "add.hpp"

namespace addition{
namespace my{
namespace work{

int abc::add(int x, int y) {

    return (x+y);
}


int abc::getCount(){
    return count;
}

abc::~abc(){
    count--;
}
};
};
};

clang ++：错误：链接器命令失败，退出代码为1

0 个答案: