ubuntu如何确保MPI编译器包装器(mpicxx)在搜索路径中,以便CMake可以找到它。您可能需要通过将-DMPI_CXX_COMPILER=选项传递给cmake程序来明确地指定其路径
时间: 2024-04-09 10:27:32 浏览: 147
对于Ubuntu系统,您可以按照以下步骤确保MPI编译器包装器(mpicxx)在搜索路径中,以便CMake可以找到它:
1. 安装MPI库和开发工具。在终端中运行以下命令:
```
sudo apt update
sudo apt install mpich
sudo apt install libmpich-dev
```
2. 确认mpicxx编译器已安装。在终端中运行以下命令:
```
which mpicxx
```
如果正确安装,将显示mpicxx的路径。
3. 在CMakeLists.txt文件中,将以下行添加到您的项目配置中:
```
set(CMAKE_CXX_COMPILER mpicxx)
```
这将明确地告诉CMake使用mpicxx编译器。
4. 运行cmake时,通过在命令行中添加-DMPI_CXX_COMPILER选项来指定mpicxx的路径。例如:
```
cmake -DMPI_CXX_COMPILER=/path/to/mpicxx .
```
请确保将"/path/to/mpicxx"替换为实际的mpicxx路径。
这样,CMake将能够找到并使用MPI编译器包装器(mpicxx)进行构建。
相关问题
Could NOT find MPI_CXX (missing: MPI_CXX_LIB_NAMES MPI_CXX_HEADER_DIR MPI_CXX_WORKS)
This error message usually occurs when the MPI C++ library is not found or not properly installed on your system. MPI is used for parallel computing and communication between processes.
To solve this issue, you can try installing the MPI library with C++ support on your system or make sure that it is properly configured in your project settings. You can also check if the MPI C++ compiler and header files are present in the correct paths.
If you are using CMake, you can enable MPI C++ support by adding the following lines to your CMakeLists.txt file:
```
find_package(MPI REQUIRED)
include_directories(${MPI_CXX_INCLUDE_PATH})
target_link_libraries(your_target ${MPI_CXX_LIBRARIES})
```
This should help resolve the missing MPI C++ error. If you still encounter issues, you can try specifying the MPI C++ library names and header directories manually using the `MPI_CXX_LIB_NAMES` and `MPI_CXX_HEADER_DIR` CMake variables.
确保将"/path/to/mpicxx"替换为实际的mpicxx路径,并在其他CMake选项之后添加您自己的CMake选项是什么意思
抱歉我上面的回答有些错误。正确的做法是将`-DMPI_CXX_COMPILER`选项传递给CMake,而不是将其路径直接传递给该选项。这个选项的作用是指定MPI的C++编译器。
以下是正确的步骤:
1. 确认您已经安装了MPI库和对应的编译器包装器。例如,在Ubuntu上,您可以使用以下命令安装OpenMPI:
```
sudo apt-get install openmpi-bin libopenmpi-dev
```
2. 确认mpicxx可执行文件的路径。通常情况下,它会位于/usr/bin/或/usr/local/bin/目录下。您可以使用以下命令来查找mpicxx:
```
which mpicxx
```
3. 在构建您的CMake项目时,将`-DMPI_CXX_COMPILER`选项传递给CMake,并指定mpicxx的路径。例如:
```
cmake -DMPI_CXX_COMPILER=/usr/bin/mpicxx <其他CMake选项>
```
确保将"/usr/bin/mpicxx"替换为实际的mpicxx路径,并在其他CMake选项之后添加您自己的CMake选项。
通过执行以上步骤,您可以确保CMake能够找到MPI编译器包装器(mpicxx)并在搜索路径中。抱歉之前的回答有误导性,希望这次能帮到您!
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