c++ - CMake 没有正确找到 CUDA 库

Question

我正在尝试构建一个需要 CUDA 的程序。对于我提供的 CMake 脚本:

cmake -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda ..

找到CUDA并且CMake正常运行:

staudt ~/workspace/clutbb/cluster/build $ cmake -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda ..                                                                                  
-- Found CUDA: /usr/local/cuda (found version "6.5") 
-- Found Intel TBB
-- Boost version: 1.56.0
-- Found the following Boost libraries:
--   iostreams
--   program_options
-- Looking for include file pthread.h
-- Looking for include file pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Could NOT find SDL (missing:  SDL_LIBRARY SDL_INCLUDE_DIR) 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/i11/staudt/workspace/clutbb/cluster/build

但是链接器步骤失败了:

staudt ~/workspace/clutbb/cluster/build $ make
[ 69%] Built target cluster
Linking CXX executable clu
CMakeFiles/clu.dir/clu.cpp.o: In function `initCUDA(int&, CUctx_st*&, int const&)':
clu.cpp:(.text+0x517): undefined reference to `cuInit'
clu.cpp:(.text+0x52b): undefined reference to `cuDeviceGet'
clu.cpp:(.text+0x53f): undefined reference to `cuCtxCreate_v2'
clu.cpp:(.text+0x559): undefined reference to `cuDeviceGetName'
clu.cpp:(.text+0x55e): undefined reference to `cuCtxSynchronize'
CMakeFiles/clu.dir/clu.cpp.o: In function `exitCUDA(int&, CUctx_st*&)':
clu.cpp:(.text+0x684): undefined reference to `cuCtxDestroy_v2'
CMakeFiles/clu.dir/clu.cpp.o: In function `main':
clu.cpp:(.text.startup+0x1092): undefined reference to `cuCtxDestroy_v2'
clu.cpp:(.text.startup+0x10d1): undefined reference to `cuCtxSynchronize'
clu.cpp:(.text.startup+0x10e1): undefined reference to `cuCtxSynchronize'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/clu] Fehler 1
make[1]: *** [bin/CMakeFiles/clu.dir/all] Fehler 2
make: *** [all] Fehler 2

所需的库位于 /usr/local/cuda/lib64/stubs/libcuda.so，但我如何将其指出给 cmake 或 make？

Answer 1

在您现在发布的存档中，有多个项目层次结构。您在问题中发布的实际错误发生在基于 clutbb/cluster/bin 目录中的 clu.cpp 的 clu 项目的编译和链接过程中。

在同一目录中，有一个 CMakeLists.txt 文件。该文件管理项目层次结构的这一特定级别。

在这个特定的 CMakeLists.txt 文件中，有以下部分:

cuda_add_executable(clu clu.cpp)
target_link_libraries(clu ${CUDA_LIBRARY} ${TBB_LIBRARY} ${Boost_LIBRARIES} rt)
target_link_libraries(clu cluster)

尝试将上面的中间线修改为:

target_link_libraries(clu ${CUDA_LIBRARY} ${TBB_LIBRARY} ${Boost_LIBRARIES} rt cuda)

这应该修复链接器命令行中缺少的 -lcuda。可能仍然需要在您的机器上为它提供 libcuda.so 的路径，但也可能没有必要，具体取决于您的机器环境的设置方式。