尝试设置QT creator＆Cuda时，“链接器输入文件未使用，因为链接未完成”
我正在尝试使用QT创建者作为IDE开始使用C和Cuda。 不幸的是，我从一开始就遇到了问题而不确定它的来源（如果它逐渐开始，它会更容易识别）。
我基本上已经安装了CUDA（和c）并运行了小型测试程序，但我想使用IDE，所以我使用以下说明安装了QT创建者： http ： //cudaspace.wordpress.com/2011/04/07/qt- creator-cuda-linux /但是我在运行示例时遇到错误：’链接器输入文件未使用，因为链接未完成’
这里是所有的文件（由于我使用的是mac，我的修改和指令是针对linux的。我可以编译基本的hello world类型的东西但不是出于某种原因的例子）：my_first_project.pro：
TEMPLATE = app LANGUAGE = C++ CONFIG += qt4 SOURCES += main.cpp \ cuda_interface.cu # Cuda sources CUDA_SOURCES += cuda_interface.cu # Project dir and outputs PROJECT_DIR = $$system(pwd) OBJECTS_DIR = $$PROJECT_DIR/Obj DESTDIR = ../bin # Path to cuda SDK install CUDA_SDK = /Users/lostsoul/Dropbox/qt_cuda/C/ # Path to cuda toolkit install CUDA_DIR = /usr/local/cuda # GPU architecture CUDA_ARCH = compute_10 # nvcc flags (ptxas option verbose is always useful) NVCCFLAGS = --compiler-options -fno-strict-aliasing -use_fast_math --ptxas-options=-v # include paths INCLUDEPATH += $$CUDA_DIR/include INCLUDEPATH += $$CUDA_SDK/common/inc/ INCLUDEPATH += $$CUDA_SDK/../shared/inc/ # lib dirs QMAKE_LIBDIR += $$CUDA_DIR/lib64 QMAKE_LIBDIR += $$CUDA_SDK/lib QMAKE_LIBDIR += $$CUDA_SDK/common/lib # libs - note than i'm using a x_86_64 machine LIBS += -lcudart -lcutil_x86_64 # join the includes in a line CUDA_INC = $$join(INCLUDEPATH,' -I','-I',' ') LD_LIBRARY_PATH = /usr/local/cuda/lib # Prepare the extra compiler configuration (taken from the nvidia forum - i'm not an expert in this part) cuda.input = CUDA_SOURCES cuda.output = ${OBJECTS_DIR}${QMAKE_FILE_BASE}_cuda.o cuda.commands = $$CUDA_DIR/bin/nvcc -m64 -g -G -arch=$$CUDA_ARCH -c $$NVCCFLAGS $$CUDA_INC $$LIBS ${QMAKE_FILE_NAME} -o ${QMAKE_FILE_OUT} cuda.dependcy_type = TYPE_C cuda.depend_command = $$CUDA_DIR/bin/nvcc -g -G -M $$CUDA_INC $$NVCCFLAGS ${QMAKE_FILE_NAME} # Tell Qt that we want add more stuff to the Makefile QMAKE_EXTRA_COMPILERS += cuda
cuda_interface.cu：
// CUDA-C includes #include #include extern "C" void runCudaPart(); // Main cuda function void runCudaPart() { // all your cuda code here *smile* }
main.cpp中：
#include // This is the 'elder trick of the...' - Tell the compiler this function is defined in other place extern "C" void runCudaPart(); int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); runCudaPart(); return a.exec(); }
这是错误的输出：
09:24:27: Running build steps for project first_project... 09:24:27: Configuration unchanged, skipping qmake step. 09:24:27: Starting: "/usr/bin/make" -w make: Entering directory `/Users/lostsoul/Dropbox/qt_cuda/first_project-build-desktop-Desktop_Qt_4_8_1_for_GCC__Qt_SDK__Debug' /usr/local/cuda/bin/nvcc -m64 -g -G -arch=compute_10 -c --compiler-options -fno-strict-aliasing -use_fast_math --ptxas-options=-v -I/usr/local/cuda/include -I/Users/lostsoul/Dropbox/qt_cuda/C//common/inc/ -I/Users/lostsoul/Dropbox/qt_cuda/C//../shared/inc/ -lcudart -lcutil_x86_64 ../first_project/cuda_interface.cu -o ../first_project/Obj/cuda_interface_cuda.o g++ -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/mkspecs/macx-g++ -I../first_project -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/lib/QtCore.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include/QtCore -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/lib/QtGui.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include/QtGui -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include -I/usr/local/cuda/include -I../C/common/inc -I/Users/lostsoul/Dropbox/qt_cuda/C//../shared/inc/ -I. -I../first_project -I. -F/Users/lostsoul/QtSDK/Desktop/Qt/4.8.1/gcc/lib -o ../first_project/Obj/main.o ../first_project/main.cpp gcc -c -pipe -g -gdwarf-2 -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -Wall -W -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/mkspecs/macx-g++ -I../first_project -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/lib/QtCore.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include/QtCore -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/lib/QtGui.framework/Versions/4/Headers -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include/QtGui -I../../../QtSDK/Desktop/Qt/4.8.1/gcc/include -I/usr/local/cuda/include -I../C/common/inc -I/Users/lostsoul/Dropbox/qt_cuda/C//../shared/inc/ -I. -I../first_project -I. -F/Users/lostsoul/QtSDK/Desktop/Qt/4.8.1/gcc/lib -o ../first_project/Obj/cuda_interface.o ../first_project/cuda_interface.cu i686-apple-darwin11-llvm-gcc-4.2: ../first_project/cuda_interface.cu: linker input file unused because linking not done g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -o ../bin/first_project.app/Contents/MacOS/first_project ../first_project/Obj/cuda_interface_cuda.o ../first_project/Obj/main.o ../first_project/Obj/cuda_interface.o -F/Users/lostsoul/QtSDK/Desktop/Qt/4.8.1/gcc/lib -L/usr/local/cuda/lib64 -L/Users/lostsoul/Dropbox/qt_cuda/C//lib -L/Users/lostsoul/Dropbox/qt_cuda/C//common/lib -L/Users/lostsoul/QtSDK/Desktop/Qt/4.8.1/gcc/lib -lcudart -lcutil_x86_64 -framework QtGui -L/usr/local/pgsql/lib -L/tmp/qt-stuff-85167/source/qt-everywhere-opensource-src-4.8.1/Desktop/Qt/4.8.1/gcc/lib -F/tmp/qt-stuff-85167/source/qt-everywhere-opensource-src-4.8.1/Desktop/Qt/4.8.1/gcc/lib -framework QtCore i686-apple-darwin11-llvm-g++-4.2: ../first_project/Obj/cuda_interface.o: No such file or directory make: *** [../bin/first_project.app/Contents/MacOS/first_project] Error 1 make: Leaving directory `/Users/lostsoul/Dropbox/qt_cuda/first_project-build-desktop-Desktop_Qt_4_8_1_for_GCC__Qt_SDK__Debug' 09:24:33: The process "/usr/bin/make" exited with code 2. Error while building project first_project (target: Desktop) When executing build step 'Make'
在过去的几个小时里，我一直在努力解决这个问题，我真的不确定如何处理这个问题。 我唯一想到的可能是我的make版本对于说明来说太新了（因为我所遵循的教程是从去年开始的）但是命令似乎已经执行了。 我真的很擅长C / Cuda和QT创建者，我的唯一目标是在QT上执行c / c ++和cuda代码（因为显然它可以以他们彼此交谈并完成代码的方式编译）。 如果这个错误是QT错误或C错误（我不认为它是一个CUDA特定错误，因为我真的没有任何代码），我越深入挖掘越不确定。
请帮忙！
根据我们在聊天中的讨论，我们发现CUDA SDK安装目录存在问题，因此您可以通过删除与SDK相关的内容来简化.pro文件。
检查CUDA SDK安装目录（/ Developer / GPU \ Computing / C）的空白区域，因为它可能是问题的原因。
说，使用最新软件和osx lion工作的基本配置如下：
QT += core QT -= gui TARGET = cuda_sample CONFIG += console CONFIG -= app_bundle TEMPLATE = app # Source files for C/C++ compiler SOURCES += main.cpp # project build directories DESTDIR = $$system(pwd) OBJECTS_DIR = $$DESTDIR/Obj # and C/C++ flags QMAKE_CFLAGS_RELEASE =-O3 QMAKE_CXXFLAGS_RELEASE =-O3 # cuda source CUDA_SOURCES += cuda_interface.cu # Path to cuda toolkit install CUDA_DIR = /usr/local/cuda INCLUDEPATH += $$CUDA_DIR/include QMAKE_LIBDIR += $$CUDA_DIR/lib # GPU architecture CUDA_ARCH = sm_20 # NVCC flags NVCCFLAGS = --compiler-options -fno-strict-aliasing -use_fast_math --ptxas-options=-v # Path to libraries LIBS += -lcudart -lcuda # join the includes in a line CUDA_INC = $$join(INCLUDEPATH,' -I','-I',' ') # Prepare the extra compiler configuration (taken from the nvidia forum - i'm not an expert in this part) cuda.commands = $$CUDA_DIR/bin/nvcc -m64 -O3 -arch=$$CUDA_ARCH -c $$NVCCFLAGS $$CUDA_INC $$LIBS ${QMAKE_FILE_NAME} -o ${QMAKE_FILE_OUT} cuda.dependcy_type = TYPE_C cuda.depend_command = $$CUDA_DIR/bin/nvcc -O3 -M $$CUDA_INC $$NVCCFLAGS ${QMAKE_FILE_NAME} cuda.input = CUDA_SOURCES cuda.output = ${OBJECTS_DIR}${QMAKE_FILE_BASE}_cuda.o # Tell Qt that we want add more stuff to the Makefile QMAKE_EXTRA_COMPILERS += cuda
由于我们没有使用CUDA SDK库，请从cuda_interface.cu文件中删除以下行
#include // remove this line from your file
就这样。 请记住运行qmake来更改.pro文件。