cmake as设置
时间: 2023-11-08 12:00:09 浏览: 53
CMake是一个跨平台的构建工具,用于管理软件编译过程中的各种参数和配置。在CMake中,可以使用缓存变量来定义全局变量,这些变量可以被用户自定义修改。缓存变量的定义可以在CMakeCache.txt文件中找到。同时,也可以使用unset命令来解除缓存变量的定义。
CMake的设置主要通过修改缓存变量来实现。对于OpenCV项目,可以通过cmake-gui界面来修改缓存变量,以满足用户的自定义配置需求。
相关问题
cmake Werror
CMake is a build system generator that allows you to define and configure your build process. When you specify `Werror` in CMake, it means that you want to treat all warnings as errors during the build process.
To enable treating warnings as errors in CMake, you can use the `CMAKE_C_FLAGS` or `CMAKE_CXX_FLAGS` variables. These variables allow you to specify additional compiler flags for the C and C++ languages, respectively.
Here's an example of how you can enable treating warnings as errors in CMake:
```cmake
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
```
This line will add the `-Werror` flag to the existing flags in `CMAKE_C_FLAGS`, which will make all warnings treated as errors during the compilation of C code.
Similarly, for C++ code, you can use the following line:
```cmake
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
```
By adding these lines to your CMakeLists.txt file, you will enable the `-Werror` flag and treat warnings as errors when building your project using CMake.
cmake math
CMake is a popular cross-platform build system that is used to manage the build process of software projects. It provides a way to configure, build, and test your code across different platforms and compilers.
If you want to use CMake to build a project that involves math operations, you can follow these steps:
1. Create a CMakeLists.txt file in the root directory of your project.
2. Inside the CMakeLists.txt file, use the `project` command to set the project name and specify the minimum required CMake version.
3. Use the `add_executable` command to specify the name of your executable and the source files that make up your project.
4. If your project requires any math libraries, you can link them using the `target_link_libraries` command. For example, if you need to link against the math library in C, you can use `target_link_libraries(your_executable_name m)`.
5. Lastly, use the `install` command to specify the installation directory for your executable, if needed.
Here's an example CMakeLists.txt file for a project that involves math operations:
```cmake
cmake_minimum_required(VERSION 3.12)
project(MathProject)
add_executable(math_program main.cpp)
target_link_libraries(math_program m)
install(TARGETS math_program DESTINATION bin)
```
In this example, the project name is "MathProject", and the source files are specified as "main.cpp". The math library is linked using `target_link_libraries`, and the executable will be installed in the "bin" directory.
You can customize this example based on your specific project requirements and file structure.
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