Compiling Cuda dynamic parallelism with Qt creator

So recently I have been using dynamic parallelism with my cuda fluid simulation. Qt is my IDE of choice so ideally I needed it to be compiles with that. As there is not a lot of documentation on it I figured it would be a crime not to share with the world. So here is the .pro file! Enjoy!


# as I want to support 4.8 and 5 this will set a flag for some of the mac stuff
# mainly in the types.h file for the setMacVisual which is native in Qt5
isEqual(QT_MAJOR_VERSION, 5) {

QT+=gui opengl core
SOURCES += #any srcs you hav 

HEADERS += #any headers you have

FORMS += #whatever you want

OTHER_FILES += #whaterver you want

INCLUDEPATH +=./include /opt/local/include $$(HOME)/NGL/include/
LIBS += -L/opt/local/lib -lGLEW

CONFIG += console
CONFIG -= app_bundle

#This is some stuff for NGL the ncca graphics lib remove if you dont want it
#------------------------ NGL setup -----------------------------
# use this to suppress some warning from boost
QMAKE_CXXFLAGS_WARN_ON += "-Wno-unused-parameter"
QMAKE_CXXFLAGS+= -msse -msse2 -msse3
macx:QMAKE_CXXFLAGS+= -arch x86_64
# define the _DEBUG flag for the graphics lib

unix:LIBS += -L/usr/local/lib
# add the ngl lib
unix:LIBS += -L/$(HOME)/NGL/lib -lNGL

# now if we are under unix and not on a Mac (i.e. linux) define GLEW
 linux-*:QMAKE_CXXFLAGS += -march=native
# if we are on a mac define DARWIN

#-------------------------Cuda setup-----------------------------

#set out cuda sources
CUDA_SOURCES += cudaSrc/*.cu

# Path to cuda SDK install
macx:CUDA_DIR = /Developer/NVIDIA/CUDA-6.5
linux:CUDA_DIR = /usr/local/cuda-6.5
# Path to cuda toolkit install
macx:CUDA_SDK = /Developer/NVIDIA/CUDA-6.5/samples
linux:CUDA_SDK = /usr/local/cuda-6.5/samples

#Cuda include paths
INCLUDEPATH += $$CUDA_DIR/common/inc/
INCLUDEPATH += $$CUDA_DIR/../shared/inc/

#cuda libs
linux:QMAKE_LIBDIR += $$CUDA_DIR/lib64
QMAKE_LIBDIR += $$CUDA_SDK/common/lib
#note for dynamic parallelism you need libcudadevrt
LIBS += -lcudart -lcudadevrt

# join the includes in a line
CUDA_INC = $$join(INCLUDEPATH,' -I','-I',' ')

# nvcc flags (ptxas option verbose is always useful)
NVCCFLAGS = --compiler-options -fno-strict-aliasing -use_fast_math --ptxas-options=-v

#prepare intermediat cuda compiler
cudaIntr.input = CUDA_SOURCES
cudaIntr.output = ${OBJECTS_DIR}${QMAKE_FILE_BASE}.o

## Tweak arch according to your hw's compute capability
cudaIntr.commands = $$CUDA_DIR/bin/nvcc -m64 -g -G -gencode arch=compute_52,code=sm_52 -dc $$NVCCFLAGS $$CUDA_INC $$LIBS ${QMAKE_FILE_NAME} -o ${QMAKE_FILE_OUT}

#Set our variable out. These obj files need to be used to create the link obj file
#and used in our final gcc compilation
cudaIntr.variable_out = CUDA_OBJ
cudaIntr.variable_out += OBJECTS
cudaIntr.clean = cudaIntrObj/*.o


# Prepare the linking compiler step
cuda.input = CUDA_OBJ
cuda.output = ${QMAKE_FILE_BASE}_link.o

# Tweak arch according to your hw's compute capability
cuda.commands = $$CUDA_DIR/bin/nvcc -m64 -g -G -gencode arch=compute_52,code=sm_52 -dlink ${QMAKE_FILE_NAME} -o ${QMAKE_FILE_OUT}
cuda.dependency_type = TYPE_C
cuda.depend_command = $$CUDA_DIR/bin/nvcc -g -G -M $$CUDA_INC $$NVCCFLAGS ${QMAKE_FILE_NAME}
# Tell Qt that we want add more stuff to the Makefile


9 thoughts on “Compiling Cuda dynamic parallelism with Qt creator

    1. Hi Xavier,
      Sorry for the late reply. What issues are you having? If you are using Qt I have some more recent projects on my github with a newer qmake for windows e.g.

      I also have a blog post about this, however with the latest CUDA release some of the information about compilers is a little out of date

      Let me know how you get on πŸ™‚



  1. Thank you for your answer. I try your project and I get thate error:
    obj\main.obj : fatal error LNK1112: module machine type ‘X86’ conflicts with target machine type ‘x64’

    What should I modify?


    1. I’m not a 100% sure but it looks like you might be trying to compile to 32bit. The libraries I have setup in the qmake all use 64bit. What compiler are you using? If 32bit try compiling with a 64bit compiler?


  2. Indeed It was the reason. Now I would like to add more than one cu file in the project so I add and I get that error:
    tmpxft_000008f0_00000000-25_SPHSolverCUDAKernals2.ii: fatal error C1041: cannot open program database ‘C:\Users\seniordev\Desktop\build-Stippling-Desktop_Qt_5_6_2_MSVC2015_64bit-Release\vc140.pdb’; if multiple CL.EXE write to the same .PDB file, please use /FS
    So I change the /MD to the /FS and I get the same error.


    1. I had a couple of issues with added multiple .cu files on windows. For some reason qmake will just ignore all but the first file. Im sure there is probably a fix but I haven’t looked into it yet. As to your error however you need to turn off shadow building i.e. the Projects tab on the left then untick shadow build in the “General” field.


  3. I unstick the shadow build but for the multiple cu file there are still error on the compilation
    So there is no solution to compile multiple file on windows?
    I already have project on Linux with multiple cu file which works properly but on Windows not.


    1. Yeah, for some reason qmake behaves differently on windows to linux. I am unsure why. Personally I haven’t looked into a solution for windows as I haven’t had a need for multiple .cu files with my projects. However I’m sure there must be a neat trick to get around it. If you find a solution I would love to hear it πŸ™‚


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s