获取架构 arm64 错误的未定义符号

问：

我在 M1 Pro Mac （CLion） 上构建，编译时出现以下错误：

FAILED: tree 
: && /Library/Developer/CommandLineTools/usr/bin/c++ -g -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX12.0.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names  CMakeFiles/tree.dir/main.cpp.o CMakeFiles/tree.dir/Node.cpp.o CMakeFiles/tree.dir/Tree.cpp.o CMakeFiles/tree.dir/Unit.cpp.o -o tree   && :
Undefined symbols for architecture arm64:
  "Node<Unit>::addRoot(Unit)", referenced from:
      _main in main.cpp.o
  "Node<Unit>::Node()", referenced from:
      _main in main.cpp.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

我有三个类，和 .我遇到的大多数帖子都表明其中一个文件不包含在项目中（例如，使用 g++ 编译器的架构 arm64 的未定义符号）。我怀疑这是问题所在，因为它们似乎都包含在编译器行中。NodeTreeUnit

我的样子是这样的：CMakeLists.txt

cmake_minimum_required(VERSION 3.21)
project(tree)

set(CMAKE_CXX_STANDARD 14)

add_executable(tree main.cpp Node.cpp Node.h Tree.cpp Tree.h Unit.cpp Unit.h)

我正在为该类添加头文件，因为这似乎是冒犯编译器的头文件，但是我怀疑这是问题所在。猜猜是一些制作文件设置？Unit

#include <iostream>
#include <vector>

using namespace std;

template <class T>
class Node {
    weak_ptr<Node> parent;
    vector<shared_ptr<shared_ptr<Node>>> children;
    T data;

public:
    Node();
    Node(weak_ptr<Node> parent, T &data);

    void addRoot(T node_data);
};

在这篇文章中可能会过于冗长，以下是输出：CMakeError.log

Compiling the C compiler identification source file "CMakeCCompilerId.c" failed.
Compiler: /Library/Developer/CommandLineTools/usr/bin/cc 
Build flags: 
Id flags:  

The output was:
1
ld: library not found for -lSystem
clang: error: linker command failed with exit code 1 (use -v to see invocation)


Compiling the CXX compiler identification source file "CMakeCXXCompilerId.cpp" failed.
Compiler: /Library/Developer/CommandLineTools/usr/bin/c++ 
Build flags: 
Id flags:  

The output was:
1
ld: library not found for -lc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)

如果我运行，则输出：c++ main.cpp Node.cpp Tree.cpp Unit.cpp

In file included from main.cpp:3:
./Node.h:16:38: error: a space is required between consecutive right angle brackets (use '> >')
    vector<shared_ptr<shared_ptr<Node>>> children;
                                     ^~
                                     > > 
main.cpp:7:5: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
    auto unit = std::make_unique<Unit>(1, "Test Unit");
    ^
main.cpp:7:22: error: no member named 'make_unique' in namespace 'std'
    auto unit = std::make_unique<Unit>(1, "Test Unit");
                ~~~~~^
main.cpp:7:34: error: 'Unit' does not refer to a value
    auto unit = std::make_unique<Unit>(1, "Test Unit");
                                 ^
./Unit.h:11:7: note: declared here
class Unit {
      ^
main.cpp:7:40: warning: expression result unused [-Wunused-value]
    auto unit = std::make_unique<Unit>(1, "Test Unit");
                                       ^
main.cpp:8:20: error: expected ';' at end of declaration
    Node<Unit> node {};
                   ^
                   ;
2 warnings and 4 errors generated.
In file included from Node.cpp:5:
./Node.h:16:38: error: a space is required between consecutive right angle brackets (use '> >')
    vector<shared_ptr<shared_ptr<Node>>> children;
                                     ^~
                                     > > 
1 error generated.

我是 C++ 的新手，所以我发现这个问题有点麻烦。