Question

我尝试在Mac OSX 10.8.3上使用CMake编译一个简单的CUDA“Hello World”。

呼叫cmake .似乎成功了。这是我的CMakeList.txt：

project(HelloWorld)
cmake_minimum_required(VERSION 2.8)

FIND_PACKAGE(CUDA)

CUDA_INCLUDE_DIRECTORIES(/Developer/NVIDIA/CUDA-5.0/samples/common/inc)
CUDA_ADD_EXECUTABLE(helloWorld helloWorld.cu)

...和输出：

-- The C compiler identification is Clang 4.2.0
-- The CXX compiler identification is Clang 4.2.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Found CUDA: /Developer/NVIDIA/CUDA-5.0 (found version "5.0")
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/mennny/Documents/UNI/6_Semester/0_PMPP/1_exercises/cuda-hello-world

但之后调用make失败并出现以下错误：

[100%] Building NVCC (Device) object CMakeFiles/helloWorld.dir//./helloWorld_generated_helloWorld.cu.o
clang: error: unsupported option '-dumpspecs'
clang: error: no input files
CMake Error at helloWorld_generated_helloWorld.cu.o.cmake:206 (message): Error generating /Users/mennny/Documents/UNI/6_Semester/0_PMPP/1_exercises/cuda-hello-world/CMakeFiles/helloWorld.dir//./helloWorld_generated_helloWorld.cu.o


make[2]: *** [CMakeFiles/helloWorld.dir/./helloWorld_generated_helloWorld.cu.o] Error 1
make[1]: *** [CMakeFiles/helloWorld.dir/all] Error 2
make: *** [all] Error 2

我搜索了显示的错误但找不到足够的答案。尽管make成功，但cmake失败的原因仍然存在。

感谢您的帮助。

Answer 1

XCode中的默认C编译器在OS X Lion中更改为CLang。 CLang与nvcc不兼容，因此您需要更改nvcc用于非cuda（主机）代码的编译器。将以下内容添加到您的CMakeList.txt将起作用：

if (NOT DEFINED CUDA_HOST_COMPILER AND CMAKE_C_COMPILER_ID STREQUAL "Clang" AND EXISTS /usr/bin/gcc)
  set(CUDA_HOST_COMPILER /usr/bin/gcc CACHE FILEPATH "Host side compiler used by NVCC")
  message(STATUS "Setting CMAKE_HOST_COMPILER to /usr/bin/gcc instead of ${CMAKE_C_COMPILER}.")
endif()

如有必要，调整gcc的路径。

Answer 2

如果您不想更改CMakeLists.txt，如果您将环境变量CXX设置为“gcc”（假设您的路径中没有任何其他GCC在/ usr / bin之前））。

CMake会自动捡起它。

在OSX 10.8.3上CUDA 5.0，CMake和Make失败

2 个答案: