``-DLLVM_ENABLE_DOXYGEN_QT_HELP=ON``; otherwise this has no
effect.
+**LLVM_DOXYGEN_SVG**:BOOL
+ Uses .svg files instead of .png files for graphs in the Doxygen output.
+ Defaults to OFF.
+
**LLVM_ENABLE_SPHINX**:BOOL
If enabled CMake will search for the ``sphinx-build`` executable and will make
the ``SPHINX_OUTPUT_HTML`` and ``SPHINX_OUTPUT_MAN`` CMake options available.