在旧的Macbook上，忽然发现无法开启MPI编译程序，运行 CMake 时会报如下错误：
-- Could NOT find MPI_C (missing: MPI_C_WORKS) -- Could NOT find MPI_CXX (missing: MPI_CXX_WORKS) CMake Error at /usr/local/Cellar/cmake/3.27.9/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message): Could NOT find MPI (missing: MPI_C_FOUND MPI_CXX_FOUND) Call Stack (most recent call first): /usr/local/Cellar/cmake/3.27.9/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE) /usr/local/Cellar/cmake/3.27.9/share/cmake/Modules/FindMPI.cmake:1837 (find_package_handle_standard_args) CMakeLists.txt:30 (find_package)
另一台Macboo安装了 OpenMPI 版本，可以正常编译MPI程序。这台笔记本安装的是 MPICH 版本，不知为何突然不行了。尝试过卸载重装 MPICH，新安装 OpenMPI 版本，问题依旧，看来是一些环境或者设置已经出问题了。
百般尝试无法解决的情况下，最终使用手动指定MPI库绕过了 CMake 的MPI检测：
cmake .. 其它选项 \ -DMPI_C_ADDITIONAL_INCLUDE_DIRS=/usr/local/Cellar/mpich/4.1.2/include \ -DMPI_C_LIBRARIES="-L/usr/local/Cellar/mpich/4.1.2/lib -lmpi -lpmpi" \ -DMPI_CXX_ADDITIONAL_INCLUDE_DIRS=/usr/local/Cellar/mpich/4.1.2/include \ -DMPI_CXX_LIBRARIES="-L/usr/local/Cellar/mpich/4.1.2/lib -lmpi -lpmpi" \ -DCMAKE_C_COMPILER=/usr/local/bin/mpicc \ -DCMAKE_CXX_COMPILER=/usr/local/bin/mpicxx