This repo is a sample Makefile for building a project that has both C++ (.cpp and .h) and CUDA (.cu and .cuh) source files. This Makefile assumes a project file structure as the following:

|--> Project/       |--> Makefile       |--> src/ (source files)       |--> include/ (header files)       |--> bin/

For example, you could have multiple .cpp and .cu files in the source directory (src/), multiple .h and .cuh header files in the header directory (include/), and the file with the main() function (titled main.cpp in this example) in the base directory. An example of this could be the following:

|--> Project/       |--> Makefile       |--> main.cpp       |--> src/              |--> file1.cpp              |--> file2.cpp              |--> file_cuda1.cu              |--> file_cuda2.cu       |--> include/              |--> file1.h              |--> file2.h              |--> file1.cuh              |--> file2.cuh       |--> bin/

The Makefile in this repo compiles a .cu and .cuh file called cuda_kernel.cu and cuda_kernel.cuh, which contains a simple CUDA device function. The cuda_kernel.cuh header file is included in the main.cpp file and called in the main() function. The Makefile will compile all the CUDA and C++ source files in src/ first, then compile the main.cpp file, and finally link them together.

To use this Makefile in your own projects, a few parameters may need to be changed. First, the CUDA root directory should be specified for your machine.

############################################################# USER SPECIFIC DIRECTORIES ### CUDA directory:CUDA_ROOT_DIR=/usr/local/cuda##########################################################

In addition, any changes to compiler options, flags, or alias should be made.

############################################################ CC COMPILER OPTIONS ### CC compiler options:CC=g++CC_FLAGS=CC_LIBS=############################################################ NVCC COMPILER OPTIONS ### NVCC compiler options:NVCC=nvccNVCC_FLAGS=NVCC_LIBS=##########################################################

The project's file structure can be changed if necessary.

############################################################ Project file structure ### Source file directory:SRC_DIR = src# Object file directory:OBJ_DIR = bin# Include header file diretory:INC_DIR = include##########################################################

Finally, and most important, all of the object files that will be created should be listed in the OBJS variable with a space between each entry. Each source file in your project should be listed here as $(OBJ_DIR)/yourfile.o , these are all of the compiled source files (object files) that will be linked together to create the executable file.

############################################################ Make variables ### Target executable name:EXE = run_test# Object files:OBJS = $(OBJ_DIR)/main.o $(OBJ_DIR)/cuda_kernel.o##########################################################

Two final notes:

1. This Makefile was created on an Linux system and may not work for non-Linux OS.

2. You may clone this repository or copy and paste any component of this repository into your projects. I hope it helps.