Creating call graphs with Doxygen

To create call graphs from your C++ code, install Doxygen and GraphViz.

Installing Doxygen

Clone the latest version of Doxygen:

git clone https://github.com/doxygen/doxygen.git --depth=1

Get the required packages bison and flex. Once you got them, compile Doxygen:

cd doxygen
mkdir build
cd build
cmake -G "Unix Makefiles" ..
make

The resulting binary will be in doxygen/build/bin/doxygen.

Installing GraphViz

It should be as simple as sudo apt-get install graphviz. Make sure dotty is in your PATH.

Creating the call graph

Create a Doxygen configuration file (it doesn’t matter where nor with what filename); doxygen -g [configfile.name] may be called to generate a basic configuration file.

After that, make sure the following values are correct in your configuration file:

OPTIMIZE_OUTPUT_FOR_C  = YES
EXTRACT_ALL            = YES
EXTRACT_STATIC         = YES
# Set only the dirs you want
INPUT                  = src/ test/
RECURSIVE              = YES
SOURCE_BROWSER         = YES
HAVE_DOT               = YES
CALL_GRAPH             = YES
CALLER_GRAPH           = YES

Defining DOT_NUM_THREADS is optional but it will improve execution time.

Adding support for CUDA (.cu) files

To add support for CUDA files:

• Modify FILE_PATTERNS to include *.cu
• Modify EXTENSION_MAPPING, adding cu=c++ after the = sign

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Sources:

• http://www.stack.nl/~dimitri/doxygen/download.html
• https://github.com/neovim/neovim/wiki/Generate-callgraphs-with-Doxygen