Add doxygen configuration and target to cmake

After generating the Makefile, documentation is generated by issueing "make
doc", and ends up in the "doc" sub-directory in the build directory.

CMakeLists.txt

@@ -231,6 +231,15 @@ INSTALL(FILES "${PROJECT_BINARY_DIR}/libfreenect2_export.h" DESTINATION include/
 INSTALL(FILES "${PROJECT_BINARY_DIR}/freenect2Config.cmake" DESTINATION lib/cmake/freenect2/)
 INSTALL(FILES "${PROJECT_BINARY_DIR}/freenect2.pc" DESTINATION lib/pkgconfig/)
 
+find_package(Doxygen)
+IF(DOXYGEN_FOUND)
+  add_custom_target(
+    doc
+    COMMAND "DOXYGEN_OUTPUT_DIR=${PROJECT_BINARY_DIR}/doc" ${DOXYGEN_EXECUTABLE} Doxyfile
+    WORKING_DIRECTORY "${MY_DIR}"
+  )
+ENDIF()
+
 IF(BUILD_EXAMPLES)
   MESSAGE(STATUS "Configurating examples")
   ADD_SUBDIRECTORY(${MY_DIR}/examples)

Doxyfile

@@ -58,7 +58,7 @@ PROJECT_LOGO           =
 # entered, it will be relative to the location where doxygen was started. If
 # left blank the current directory will be used.
 
-OUTPUT_DIRECTORY       = doc
+OUTPUT_DIRECTORY       = "$(DOXYGEN_OUTPUT_DIR)"
 
 # If the CREATE_SUBDIRS tag is set to YES, then doxygen will create 4096 sub-
 # directories (in 2 levels) under the output directory of each output format and
@@ -731,7 +731,7 @@ WARN_FORMAT            = "$file:$line: $text"
 # messages should be written. If left blank the output is written to standard
 # error (stderr).
 
-WARN_LOGFILE           = DoxyWarnings.txt
+WARN_LOGFILE           =
 
 #---------------------------------------------------------------------------
 # Configuration options related to the input files
@@ -795,7 +795,7 @@ EXCLUDE_SYMLINKS       = NO
 # Note that the wildcards are matched against the file with absolute path, so to
 # exclude all test directories for example use the pattern */test/*
 
-EXCLUDE_PATTERNS       =
+EXCLUDE_PATTERNS       = */include/internal/*
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
 # (namespaces, classes, functions, etc.) that should be excluded from the
@@ -1790,18 +1790,6 @@ GENERATE_XML           = NO
 
 XML_OUTPUT             = xml
 
-# The XML_SCHEMA tag can be used to specify a XML schema, which can be used by a
-# validating XML parser to check the syntax of the XML files.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_SCHEMA             =
-
-# The XML_DTD tag can be used to specify a XML DTD, which can be used by a
-# validating XML parser to check the syntax of the XML files.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_DTD                =
-
 # If the XML_PROGRAMLISTING tag is set to YES doxygen will dump the program
 # listings (including syntax highlighting and cross-referencing information) to
 # the XML output. Note that enabling this will significantly increase the size
@@ -2050,7 +2038,7 @@ HIDE_UNDOC_RELATIONS   = NO
 # set to NO
 # The default value is: NO.
 
-HAVE_DOT               = YES
+HAVE_DOT               = NO
 
 # The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
 # to run in parallel. When set to 0 doxygen will base this on the number of