使用CMake在NVCC中触发C ++ 11支持 [英] Triggering C++11 support in NVCC with CMake

问题描述

我正在运行具有CUDA 7.5的Ubuntu 15.10。 CMmake是v3.2.2，NVCC是7.5，v7.5.17； GCC是Ubuntu 5.2.1-22ubuntu2 v5.2.1

I'm running Ubuntu 15.10 with CUDA 7.5. CMmake is v3.2.2, NVCC is release 7.5, v7.5.17; GCC is Ubuntu 5.2.1-22ubuntu2 v5.2.1

在常规项目中触发C ++ 11很容易：

Triggering C++11 in regular projects is easy with:

project(foo CXX)
set(TARGET foo CMAKE_CXX_STANDARD 11)

我正在使用以下命令定义CUDA项目：

I'm defining my CUDA project with:

find_package(CUDA REQUIRED)
CUDA_ADD_EXECUTABLE(foo ${foo_src} ${foo_hdr} ${foo_cu})

但是C ++ 11支持不会传播到NVCC。我必须添加：

But the C++11 support doesn't get propagated to NVCC. I have to add:

list(APPEND CUDA_NVCC_FLAGS "-std=c++11")

这似乎是一种矛盾。根据此任务，最近有明显的工作要做，但我一直找不到结果。

This seems like a kludge. There was evidently work on this recently according to this task, but I haven't been able to find the results.

在将项目声明为C ++ 11时，如何使CMake自动设置C ++ 11标志？

How do I get CMake to automatically set the C++11 flags when declaring the project as C++11?

编辑：我已经使用CUDA 8.0和CMake 3.5.1。重新解决了这个问题。

I've retuned to to this question with CUDA 8.0 and CMake 3.5.1.

来自文档，设置（CUDA_PROPAGATE_HOST_FLAGS开启）将传播 CMAKE_CXX_FLAGS 的内容，因此以下代码会同时为cpp和nvcc触发C ++ 11：

From the documentation, set(CUDA_PROPAGATE_HOST_FLAGS ON) will propagate the contents of CMAKE_CXX_FLAGS, so the following triggers C++11 for both cpp and nvcc:

set (CMAKE_CXX_FLAGS "--std=c++11")
set (CUDA_PROPAGATE_HOST_FLAGS ON)

但是， set（CMAKE_CXX_STANDARD 11）不会影响 CMAKE_CXX_FLAGS ，因此以下给出了C ++ 11设备代码的编译器错误，因为没有东西可以传播：

However, set(CMAKE_CXX_STANDARD 11) does not impact CMAKE_CXX_FLAGS, so the following gives compiler errors for C++11 device code, as there's nothing to propagate:

set (CMAKE_CXX_STANDARD 11)
set (CUDA_PROPAGATE_HOST_FLAGS ON)

我似乎无法找到避免显式设置-std = c ++ 11 使用CXX或CUDA标志。

I can't seem to find a combination of CMake commands that avoids explicitly setting --std=c++11 in either CXX or CUDA flags.

推荐答案

自CMake 3.8起（由于CMake支持CUDA作为一种语言），有了一个新的目标属性 CUDA_STANDARD 。尽管它的名称很混乱，但它在 nvcc 编译命令中添加了 -std = XXX 。

Since CMake 3.8 (since CMake supports CUDA as a language) there is a new target property CUDA_STANDARD. Although its name is quite confusing, it adds the -std=XXX to the nvcc compile command.

使用最新的CMake版本

With a recent CMake version the proper way would be

cmake_minimum_required(3.8.2)
enable_language(CUDA)
add_executable(foo ${foo_src} ${foo_cu})
set_property(TARGET foo PROPERTY CUDA_STANDARD 11)

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