Introduction to Doxygen

The Doxygen package contains a documentation system for C++, C, Java, Objective-C, Corba IDL and to some extent PHP, C# and D. It is useful for generating HTML documentation and/or an off-line reference manual from a set of documented source files. There is also support for generating output in RTF, PostScript, hyperlinked PDF, compressed HTML, and Unix man pages. The documentation is extracted directly from the sources, which makes it much easier to keep the documentation consistent with the source code.

You can also configure Doxygen to extract the code structure from undocumented source files. This is very useful to quickly find your way in large source distributions. Used along with Graphviz, you can also visualize the relations between the various elements by means of include dependency graphs, inheritance diagrams, and collaboration diagrams, which are all generated automatically.



Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.

Package Information

  • Download (HTTP):

  • Download MD5 sum: 61a5288e415d7ae4d2cd82eb137d36f8

  • Download size: 8.1 MB

  • Estimated disk space required: 247 MB (with tests)

  • Estimated build time: 1.2 SBU (with tests; both using parallelism=4)

Doxygen Dependencies


CMake-3.29.5 and git-2.45.2



Graphviz-11.0.0, ghostscript-10.03.1, libxml2-2.12.7 (required for the tests), LLVM-18.1.7 (with clang), (Qt-5.15.12 or qt-alternate-5.15.12) (deprecated), texlive-20240312 (or install-tl-unx), xapian-1.4.25 (for doxyindexer), and javacc

Installation of Doxygen

First, fix up some python scripts:

grep -rl '^#!.*python$' | xargs sed -i '1s/python/&3/'

Install Doxygen by running the following commands:

mkdir -v build &&
cd       build &&

cmake -G "Unix Makefiles"          \
      -D CMAKE_BUILD_TYPE=Release  \
      -D build_wizard=ON           \
      -D force_qt=Qt6              \
      -W no-dev .. &&

To test the results, issue: make tests. One test, 012_cite.dox, is known to fail if texlive-20240312 or install-tl-unx is not installed.

If you wish to generate the package documentation, you must have Python, TeX Live (for HTML docs) and Ghostscript (for PDF docs) installed, then issue the following command:

cmake  -D build_doc=ON \
       -D DOC_INSTALL_DIR=share/doc/doxygen-1.11.0 \
       .. &&
make docs

Now, as the root user:

make install &&
install -vm644 ../doc/*.1 /usr/share/man/man1

If you have generated the package documentation, then the man pages are automatically installed, and you do not need to run the last install ... command.

Command Explanations

-D build_wizard=OFF: Use this switch if Qt6 is not installed.

-D build_search=ON: Use this switch if xapian is installed and you wish to build external search tools (doxysearch.cgi and doxyindexer).

-D force_qt6=ON: Use this switch to build doxywizard with Qt6 even if Qt5 is installed.

-D use_libclang=ON: Use this switch if llvm with clang are installed, to add support for libclang parsing.

Configuring Doxygen

There is no real configuration necessary for the Doxygen package although three additional packages are required if you wish to use extended capabilities. If you require formulas to create PDF documentation, then you must have texlive-20240312 installed. If you require formulas to convert PostScript files to bitmaps, then you must have ghostscript-10.03.1 installed.


Installed Programs: doxygen and optionally, doxywizard, doxyindexer and doxysearch.cgi
Installed Libraries: None
Installed Directory: /usr/share/doc/doxygen-1.11.0

Short Descriptions


is a command-line based utility used to generate template configuration files and then generate documentation from these templates. Use doxygen --help for an explanation of the command-line parameters


is a GUI front-end for configuring and running doxygen


generates a search index called doxysearch.db from one or more search data files produced by doxygen. See, e.g.


is a CGI program to search the data indexed by doxyindexer