Mac更新完系统，通过命令行准备编译C++文件时，报错：

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools) 

解决方法：更新xcode，在命令行运行

xcode-select --install 

安装完，重新编译，报错：

CMake Error at /opt/homebrew/Cellar/cmake/3.25.0/share/cmake/Modules/CMakeTestCCompiler.cmake:70 (message):   The C compiler      "/Library/Developer/CommandLineTools/usr/bin/cc"    is not able to compile a simple test program.    It fails with the following output:      Change Dir: /Users/caishuxian/GCNO/build/CMakeFiles/CMakeScratch/TryCompile-76ti7x          Run Build Command(s):/usr/bin/make -f Makefile cmTC_39711/fast && /Library/Developer/CommandLineTools/usr/bin/make  -f CMakeFiles/cmTC_39711.dir/build.make CMakeFiles/cmTC_39711.dir/build     Building C object CMakeFiles/cmTC_39711.dir/testCCompiler.c.o     /Library/Developer/CommandLineTools/usr/bin/cc   -arch arm64 -MD -MT CMakeFiles/cmTC_39711.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_39711.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_39711.dir/testCCompiler.c.o -c /Users/caishuxian/GCNO/build/CMakeFiles/CMakeScratch/TryCompile-76ti7x/testCCompiler.c     Linking C executable cmTC_39711     /opt/homebrew/Cellar/cmake/3.25.0/bin/cmake -E cmake_link_script CMakeFiles/cmTC_39711.dir/link.txt --verbose=1     /Library/Developer/CommandLineTools/usr/bin/cc  -arch arm64 -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/cmTC_39711.dir/testCCompiler.c.o -o cmTC_39711      ld: library 'System' not found     clang: error: linker command failed with exit code 1 (use -v to see invocation)     make[1]: *** [cmTC_39711] Error 1     make: *** [cmTC_39711/fast] Error 2                  CMake will not be able to correctly generate this project. Call Stack (most recent call first):   CMakeLists.txt:3 (project) 

解决方法：删除原有 build 文件夹，重新创建新 build 文件夹。