How should a very simple Makefile look like for Cu

Question

I want to compile a very basic hello world level Cuda program under Linux. I have three files:

• the kernel: helloWorld.cu
• main method: helloWorld.cpp
• common header: helloWorld.h

Could you write me a simple Makefile to compile this with nvcc and g++?

Thanks,
Gabor

Answer 1

My version, verbose but transparent:

myapp: myapp.o
    g++ -fPIC -o $@ $< -L /usr/local/cuda/lib -lcudart

myapp.o: myapp.cu
    /usr/local/cuda/bin/nvcc --compiler-options -fno-strict-aliasing \
    -I/usr/local/cuda/include \
    -DUNIX -O2 -o $@ -c $<

matrixMul: matrixMul.o
    g++ -fPIC -o $@ $< -L /usr/local/cuda/lib -lcudart

# It MUST be named .cu or nvcc compiles as regular C !!! (no __global__)
matrixMul.o: matrixMul.cu
    /usr/local/cuda/bin/nvcc --compiler-options -fno-strict-aliasing \
    -I/usr/local/cuda/include \
    -DUNIX -O2 -o $@ -c $<

Answer 2

Here is an example what my current project looks like. As you can see there is a few OpenGL libraries

ce : cudaExample.c cudaExample.h
    cp cudaExample.c cudaExample.cu
    /usr/local/cuda/bin/nvcc -arch=sm_20 -o ce -lglut -lGL -lGLU -lXext -lXmu -lX11 -lm  cudaExample.cu

then run make ce and ./ce

Answer 3

Just in case, here's my variant. I use it to compile CUDA projects on Mac, but I think it will suit Linux too. It requires CUDA SDK.

BINDIR = ./ # places compiled binary in current directory
EXECUTABLE := helloWorld

CCFILES := helloWorld.cpp
CUFILES := helloWorld.cu

# an ugly part - setting rootdir for CUDA SDK makefile
# look for common.mk - I don't know where SDK installs it on Linux -
# and change ROOTDIR accordingly 
ROOTDIR := /Developer/GPU\ Computing/C/common

include $(ROOTDIR)/../common/common.mk

Answer 4

I've never heard of Cuda before, but from the online documentation it looks as if X.cu is supposed to be compiled into X.o, so having helloWorld.cu and helloWorld.cpp is not a good idea. With your permission I'll rename the "kernel" helloKernel.cu, then this should work:

NVCC = nvcc

helloWorld.o: helloWorld.cpp helloWorld.h
    $(NVCC) -c %< -o $@

helloKernel.o: helloKernel.cu
    $(NVCC) -c %< -o $@

helloWorld: helloWorld.o helloKernel.o
    $(NVCC) %^ -o $@

(Note that those leading spaces are tabs.)

If that works, try a slicker version:

NVCC = nvcc

helloWorld.o: %.o : %.cpp %.h
helloKernel.o: %.o : %.cu

%.o:
    $(NVCC) -c %< -o $@

helloWorld: helloWorld.o helloKernel.o
    $(NVCC) %^ -o $@