CUDACXX环境变量

CUDACXX环境变量是一个用于指定CUDA编译器路径的环境变量。在使用CUDA进行GPU编程时，需要使用CUDA编译器将CUDA源代码编译为可执行的GPU代码。CUDACXX环境变量可以告诉系统在哪里找到CUDA编译器。

通常情况下，CUDACXX环境变量的值应该是CUDA编译器的路径。在Linux系统中，可以通过在终端中运行以下命令来设置CUDACXX环境变量：

export CUDACXX=/path/to/cuda/cuda/bin/nvcc

其中`/path/to/cuda`是CUDA安装的路径。在Windows系统中，可以通过在命令提示符中运行以下命令来设置CUDACXX环境变量：

setx CUDACXX "C:\path\to\cuda\cuda\bin\nvcc"

同样，`C:\path\to\cuda`是CUDA安装的路径。

设置了CUDACXX环境变量后，系统将使用指定路径下的CUDA编译器进行编译。这对于使用特定版本的CUDA或者非默认安装路径的情况非常有用。

相关问题

Tell CMake where to find the compiler by setting either the environment variable "CUDACXX" or the CMake cache entry CMAKE_CUDA_COMPILER to the full path to the compiler, or to the compiler name if it is in the PATH.

This message is indicating that in order to compile a CUDA (Nvidia GPU programming) project using CMake (a cross-platform build system), you need to specify the location of the CUDA compiler. You can either set the environment variable "CUDACXX" or the CMake cache entry "CMAKE_CUDA_COMPILER" to the path of the compiler.

If the compiler is in your PATH, you can simply set the "CMAKE_CUDA_COMPILER" to the name of the compiler, otherwise you need to specify the full path to the compiler executable.

For example, if the CUDA compiler is located at "/usr/local/cuda/bin/nvcc", you can set the "CMAKE_CUDA_COMPILER" as follows:

set(CMAKE_CUDA_COMPILER "/usr/local/cuda/bin/nvcc")

Alternatively, you can set the "CUDACXX" environment variable:

export CUDACXX=/usr/local/cuda/bin/nvcc

No CMAKE_CUDA_COMPILER could be found. Tell CMake where to find the compiler by setting either the environment variable "CUDACXX" or the CMake cache entry CMAKE_CUDA_COMPILER to the full path to the compiler, or to the compiler name if it is in the PATH.

这个错误是因为 CMake 没有找到 CUDA 的编译器。解决这个问题的方法是设置环境变量 "CUDACXX" 或者设置 CMake 缓存中的 CMAKE_CUDA_COMPILER 为编译器的完整路径或者编译器的名称（如果在 PATH 中）。您可以试着在终端中设置环境变量 CUDACXX，例如：

export CUDACXX=/usr/local/cuda/bin/nvcc

或者在 CMakeLists.txt 中添加设置 CMAKE_CUDA_COMPILER 的语句，例如：

set(CMAKE_CUDA_COMPILER /usr/local/cuda/bin/nvcc)

然后重新运行 CMake，这个错误应该就会被解决了。