我有使用CMake编译我的CUDA代码的问题.我使用CUDA 7,nvcc的版本信息如下：
nvcc: NVIDIA (R) Cuda compiler driver copyright (c) 2005-2014 NVIDIA Corporation Built on Tue_Dec__9_18:10:46_CST_2014 Cuda compilation tools,release 7.0,V7.0.17
我的CMake文件使用find_cuda宏如下：
find_package(CUDA)
if(CUDA_FOUND)
list(APPEND CUDA_NVCC_FLAGS "-arch=sm_20;--compiler-options;-std=c++11;-O2;-DVERBOSE")
endif(CUDA_FOUND)
我添加了std = c 11编译器标志后许多帖子建议这是需要的.但是,我得到完全相同的错误有或没有这个标志.
我还添加了以下内容以从nvcc编译标志中删除C 11支持,但是这也不会改变任何东西.
if(CMAKE_COMPILER_IS_GNUCC)
string(REPLACE "-std=c++11" "" CUDA_HOST_FLAGS "${CUDA_HOST_FLAGS}")
string(REPLACE "-std=c++0x" "" CUDA_HOST_FLAGS "${CUDA_HOST_FLAGS}")
endif(CMAKE_COMPILER_IS_GNUCC)
我得到的错误如下：
/usr/lib/gcc/x86_64-linux-gnu/4.8/include/stddef.h(432): error: identifier "nullptr" is undefined
/usr/lib/gcc/x86_64-linux-gnu/4.8/include/stddef.h(432): error: expected
a ";"
/usr/include/x86_64-linux-gnu/c++/4.8/bits/c++config.h(190): error:
expected a ";"
/usr/include/c++/4.8/exception(63): error: expected a ";"
/usr/include/c++/4.8/exception(68): error: expected a ";"
/usr/include/c++/4.8/exception(76): error: expected a ";"
/usr/include/c++/4.8/exception(83): error: expected a ";"
/usr/include/c++/4.8/exception(93): error: expected a "{"
/usr/include/c++/4.8/bits/exception_ptr.h(64): error: function
"std::current_exception" returns incomplete type
"std::__exception_ptr::exception_ptr"
我正在使用gcc 4.8,但是也会得到与4.7相同的错误.我在cmake 2.8.12.2.
使用CMAKE verbose进行编译为nvcc编译提供以下标志：
/usr/local/cuda-7.0/bin/nvcc /home/xargon/DropBox/code/gpu-mosaicing /src/gpu/kernels/bgra_2_gray.cu -c -o /home/xargon/code/mosaicing_bin /gpu/kernels/CMakeFiles/kernels.dir//./kernels_generated_bgra_2_gray.cu.o -ccbin /usr/bin/cc -m64 -DUSE_CUDA -DUSE_OPENCV -DUSE_QT -Xcompiler,\"-std=c++11\",\"-O3\",\"-DNDEBUG\" -arch=sm_20 --compiler-options -std=c++11 -O2 -DVERBOSE -DNVCC -I/usr/local/cuda-7.0/include -I/usr/local /include/opencv -I/usr/local/include -I/home/xargon/DropBox/code/gpu- mosaicing/src/cpu/gui/qt -I/usr/include -I/home/xargon/DropBox/code/gpu- mosaicing/src/cpu/core -I/home/xargon/DropBox/code/gpu-mosaicing/src/cpu /datasources -I/home/xargon/DropBox/code/gpu-mosaicing/src/gpu /intraoperability -I/home/xargon/DropBox/code/gpu-mosaicing/src/utils -I/usr/local/cuda-7.0/include
解决方法
这对我来说使用CUDA 7,gcc 4.8.2和CMake 3.0.2.
我更新了代码,并添加了一个简单的基于推力的示例,以便清楚地表明您可以在CUDA代码中使用C 11
的CMakeLists.txt
project(cpp11) find_package(CUDA) list(APPEND CUDA_NVCC_FLAGS "-arch=sm_20;-std=c++11;-O2;-DVERBOSE") SET(CUDA_PROPAGATE_HOST_FLAGS OFF) CUDA_ADD_EXECUTABLE(cpp11 main.cpp test.h test.cu)
test.h
#ifndef TEST_H #define TEST_H int run(); #endif
test.cu
#include "test.h"
#include <thrust/device_vector.h>
#include <thrust/reduce.h>
#include <thrust/sequence.h>
template<typename T>
struct Fun
{
__device__ T operator()(T t1,T t2)
{
auto result = t1+t2;
return result;
}
};
int run()
{
const int N = 100;
thrust::device_vector<int> vec(N);
thrust::sequence(vec.begin(),vec.end());
auto op = Fun<int>();
return thrust::reduce(vec.begin(),vec.end(),op);
}
main.cpp中
#include <iostream>
#include "test.h"
int main()
{
std::cout << run() << std::endl;
return 0;
}