不能删除“警告:命令行选项”-std=c++11“使用nvcc/CUDA/cmake ?

When I compile my cuda code with cmake, I can't seem to get the following warning to go away:

当我用cmake编译cuda代码时，我似乎无法得到以下警告:

cc1: warning: command line option ‘-std=c++11’ is valid for C++/ObjC++ but not for C [enabled by default]

I have reduced the problem to the compilation, not my source code. Here is a simplified (but working) example:

我已经将问题简化为编译，而不是我的源代码。这里有一个简化(但工作)的例子:

main.cu:

#include <iostream>

int main(void) {
    std::cout << "test" << std::endl;
}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.0.3) 

project(a_test)

find_package(CUDA REQUIRED)

include_directories(
    /usr/local/cuda-6.5/targets/x86_64-linux/include
    )

link_directories(
    /usr/lib/x86_64-linux-gnu
    /usr/lib/python2.7/config-x86_64-linux
    )

set(CUDA_HOST_COMPILATION_CPP ON)
set(CUDA_NVCC_FLAGS -v -std=c++11 -g -Xcompiler -fexceptions -Xcompiler -fPIC)
set(CMAKE_C_FLAGS "-g -fPIC")
set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++11 -g -fPIC")
set(CUDA_SEPARABLE_COMPILATION ON)

set(
    SRC_FILES
    main.cu
)

cuda_add_executable(
    a_test

    ${SRC_FILES}
    )
target_link_libraries(
    a_test
    ${LD_LIBRARIES}
    )

If I use the above CMakeLists.txt, it still defaults to using gcc:

如果我使用上面的CMakeLists。txt，它仍然默认使用gcc:

#$ "/usr/bin"/gcc-4.8 -D__CUDA_ARCH__=200 -E -x c      -DCUDA_DOUBLE_MATH_FUNCTIONS  -D__CUDACC__ -D__NVCC__ -D__CUDACC_RDC__ -D__CUDANVVM__  -std=c++11 -g -fPIC -g -fexceptions -fPIC -D__CUDA_PREC_DIV -D__CUDA_PREC_SQRT -I"/usr/local/cuda-6.5/include" -I"/usr/local/cuda-6.5/targets/x86_64-linux/include" -I"/usr/local/cuda-6.5/include" "-I/usr/local/cuda-6.5/bin/../targets/x86_64-linux/include"   -m64 -g -gdwarf-2 -o "/tmp/tmpxft_00001eb1_00000000-7_main.cpp2.i" "/tmp/tmpxft_00001eb1_00000000-3_main.cudafe1.gpu"
cc1: warning: command line option ‘-std=c++11’ is valid for C++/ObjC++ but not for C [enabled by default]

and if I add -ccbin /usr/bin/g++ to CUDA_NVCC_FLAGS to try and force nvcc to use it, it still tries to compile as C.

如果我添加-ccbin /usr/bin/g++到CUDA_NVCC_FLAGS来尝试和强制nvcc使用它，它仍然尝试编译成C。

#$ "/usr/bin"/g++ -D__CUDA_ARCH__=200 -E -x c      -DCUDA_DOUBLE_MATH_FUNCTIONS  -D__CUDACC__ -D__NVCC__ -D__CUDACC_RDC__ -D__CUDANVVM__  -std=c++11 -g -fPIC -g -fexceptions -fPIC -D__CUDA_PREC_DIV -D__CUDA_PREC_SQRT -I"/usr/local/cuda-6.5/include" -I"/usr/local/cuda-6.5/targets/x86_64-linux/include" -I"/usr/local/cuda-6.5/include" "-I/usr/local/cuda-6.5/bin/../targets/x86_64-linux/include"   -m64 -g -gdwarf-2 -o "/tmp/tmpxft_00001f27_00000000-7_main.cpp2.i" "/tmp/tmpxft_00001f27_00000000-3_main.cudafe1.gpu"
cc1: warning: command line option ‘-std=c++11’ is valid for C++/ObjC++ but not for C [enabled by default]

According to the CMake docs this should never be using c compilation anyway?

根据CMake文档，这不应该使用c编译吗?

CUDA_HOST_COMPILATION_CPP (Default ON)
-- Set to OFF for C compilation of host code.

Does anyone know what on earth is happening here? How can I make this warning go away? Is this a bug in nvcc or cmake?

有人知道这里发生了什么吗?我怎样才能使这个警告消失?这是nvcc或cmake的bug吗?

- - -

I have already found the following * questions and they have not solved the problem:

我已经找到了以下的*问题，他们没有解决这个问题:

how to disable gcc warning "cc1: warning: command line option ‘-std=c++11’ is valid for C++/ObjC++ but not for C [enabled by default]"
如何禁用gcc警告“cc1:警告:命令行选项‘-std=c++11’对c++ / objc++有效，但不支持c(默认启用)”
Disable gcc warning for incompatible options
禁用不兼容选项的gcc警告。

1 个解决方案

#1

Of course, after hours of tearing my hair out, all it took was 5 minutes after posting the question to work out the answer. Thanks ducky...

当然，在把我的头发扯掉几个小时之后，我只花了5分钟就把这个问题写出来了。由于极好的……

You can't have -std=c++11 in CMAKE_CXX_FLAGS because it seems to use that when compiling c code using nvcc.

在CMAKE_CXX_FLAGS中，不能有-std=c++11，因为在使用nvcc编译c代码时，它似乎使用了这种方法。

fixed CMakeLists.txt:

固定CMakeLists.txt:

cmake_minimum_required(VERSION 3.0.3) 

project(a_test)

find_package(CUDA REQUIRED)

include_directories(
    /usr/local/cuda-6.5/targets/x86_64-linux/include
    )

link_directories(
    /usr/lib/x86_64-linux-gnu
    /usr/lib/python2.7/config-x86_64-linux
    )

set(CUDA_HOST_COMPILATION_CPP ON)
set(CUDA_NVCC_FLAGS -std=c++11 -g -Xcompiler -fexceptions -Xcompiler -fPIC)
set(CMAKE_C_FLAGS "-g -fPIC")
set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-g -fPIC")
set(CUDA_SEPARABLE_COMPILATION ON)

set(
    SRC_FILES
    main.cu
)

cuda_add_executable(
    a_test

    ${SRC_FILES}
    )
target_link_libraries(
    a_test
    ${LD_LIBRARIES}
    )

I'm going to file a bug with the cmake folks.

我要向cmake用户提交一个bug。

Edit: this means that if you are trying to compile any cpp files with -std=c++11, you just have to put up with the warning (for now)

编辑:这意味着如果您试图用-std=c++11编译任何cpp文件，那么您只需忍受警告(目前)

#1