问链接gtest项目时出错

EN

最近我开始学习单元测试，我想用gtest测试我的程序。我按照以下命令安装：

$ git clone https://github.com/google/googletest 
$ cd googletest 
$ cmake -DBUILD_SHARED_LIBS=ON . 
$ make 
$ cd googlemock 
$ sudo cp ./libgmock_main.so ./gtest/libgtest.so gtest/libgtest_main.so ./libgmock.so /usr/lib/ 
$ sudo ldconfig

现在编写代码：

#include "gtest/gtest.h"

class Add
{
  private:
     int element;
  public:
     Add():element(0){}
     ~Add(){}
     void setElement(int e){ element = e; }
     int getElement() { return element; }
     int adder(int e) { return element += e; }
};

class AddTest : public ::testing::Test
{
  protected:
       int abc(int a){
            return a;
        }

     virtual void SetUp(){
          add1.setElement(1);
          add2.setElement(20);
     }
     virtual void TearDown(){}

Add add1;
Add add2;
};

TEST_F(AddTest, getTest)
{
   EXPECT_EQ(1, add1.getElement());
   EXPECT_EQ(20, add2.getElement());
}

int main(int argc, char **argv)
{
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
}

当我运行测试时，我得到了以下错误：

CMakeFiles/mock2.dir/main.cpp.o:在函数testing::internal::AssertHelper::AssertHelper(testing::TestPartResult::Type, char const*, int, char const*)' /home/artem/CLionProjects/mock2/main.cpp:33: undefined reference totesting::internal::AssertHelper::operator=(testing::Message测试中：AddTest_getTest_Test::TestBody()': /home/artem/CLionProjects/mock2/main.cpp:33: undefined reference to：：AddTest_getTest_Test::TestBody()': /home/artem/CLionProjects/mock2/main.cpp:33: undefined reference to() /home/artem/CLionProjects/mock2/main.cpp:33:未定义的对testing::internal::AssertHelper::AssertHelper(testing::TestPartResult::Type, char const*, int, char const*)' /home/artem/CLionProjects/mock2/main.cpp:34: undefined reference to测试的引用( const‘&)const’/home/artem/CLionProjects/mock2/main.cpp:33:对testing::internal::AssertHelper::~AssertHelper()' /home/artem/CLionProjects/mock2/main.cpp:34: undefined reference to测试的未定义引用：：Message:消息() /home/artem/CLionProjects/mock2/main.cpp:34:未定义的对testing::internal::AssertHelper::AssertHelper(testing::TestPartResult::Type, char const*, int, char const*)' /home/artem/CLionProjects/mock2/main.cpp:34: undefined reference to测试的引用::internal::AssertHelper::operator=(testing::Message const&) const‘/home/artem/CLionProjects/mock2/main.cpp:34:未定义引用testing::internal::AssertHelper::~AssertHelper()' /home/artem/CLionProjects/mock2/main.cpp:33: undefined reference totesting::internal::AssertHelper::~AssertHelper()’/home/artem/CLionProjects/mock2/mock2/main.cpp:34:未定义的对testing::internal::AssertHelper::~AssertHelper()' CMakeFiles/mock2.dir/main.cpp.o: In functionmain的引用: /home/artem/CLionProjects/mock2/main.cpp:39:未定义的对testing::InitGoogleTest(int*, char**)' CMakeFiles/mock2.dir/main.cpp.o: In function__static_initialization_and_destruction_0(int，的引用‘：/home/artem/CLionProjects/mock2/main.cpp:31:对testing::internal::MakeAndRegisterTestInfo(char const*, char const*, char const*, char const*, testing::internal::CodeLocation, void const*, void (*)(), void (*)(), testing::internal::TestFactoryBase*)' CMakeFiles/mock2.dir/main.cpp.o: In functionRUN_ALL_TESTS()的未定义引用: /usr/local/include/gtest/gtest.h:2235:未定义的对testing::UnitTest::GetInstance()' /usr/local/include/gtest/gtest.h:2235: undefined reference to测试的引用:UnitTest：：Run()：CMakeFiles/mock2.dir/main.cpp.o:在函数AddTest::AddTest()': /home/artem/CLionProjects/mock2/main.cpp:15: undefined reference to测试中：：Test:Test() CMakeFiles/mock2.dir/main.cpp.o:在功能AddTest::~AddTest()': /home/artem/CLionProjects/mock2/main.cpp:15: undefined reference to测试中：：AddTest::~AddTest()': /home/artem/CLionProjects/mock2/main.cpp:15: undefined reference to：：~Test(). .dir/main.cpp.o:在函数testing::internal::scoped_ptr<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::reset(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)': /usr/local/include/gtest/internal/gtest-port.h:1172: undefined reference totesting::internal::IsTrue(bool)‘中，CMakeFiles/mock2.dir/main.cpp.o:在函数testing::internal::scoped_ptr<std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> > >::reset(std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >*)': /usr/local/include/gtest/internal/gtest-port.h:1172: undefined reference totesting::internal::IsTrue(bool)’中，CMakeFiles/mock2.dir/main.cpp.o:函数testing::AssertionResult testing::internal::CmpHelperEQ<int, int>(char const*, char const*, int const&, int const&)': /usr/local/include/gtest/gtest.h:1394: undefined reference to测试：：AssertionSuccess()‘CMakeFiles/mock2.dir/main.cpp.o:在函数testing::AssertionResult testing::internal::CmpHelperEQFailure<int, int>(char const*, char const*, int const&, int const&)': /usr/local/include/gtest/gtest.h:1384: undefined reference totesting::internal::EqFailure(char const*中，std::__cxx11::basic_string，std：：分配器> const&，std::__cxx11::basic_string，std::allocator >const&CMakeFiles/mock2.dir/main.cpp.o:(.rodata._ZTI7AddTest_ZTI7AddTest+0x10)：未定义的“用于测试的类型信息：：测试”collect2: collect2: ld返回了1个退出状态CMakeFiles/mock2.dir/ failed。生成:94:目标' mock2‘失败的make3：* mock2错误1 CMakeFiles/Makefile2:67:目标' CMakeFiles/mock2.dir/all’make2 CMakeFiles/mock2.dir/all Error 2 CMakeFiles/Makefile2:79:目标‘CMakeFiles/mockake2.dir/规则’配方‘失败的make1 CMakeFiles/mock2.dir/规则错误2 Makefile:118:目标' mock2‘失败的配方：* mock2错误2

但当使用命令时

g++ main.cpp -o test -lgtest -lpthread

每件事都是好的。我如何修复它并在命令行中运行它？