Separate doxygen doc building from other docs

CMakeLists.txt

@@ -138,7 +138,8 @@ endif()
 # DOCUMENTATION
 #----------------------------------
 
-option(BUILD_DOC "Build doxygen documentation for sdbus-c++ API" ON)
+option(BUILD_DOC "Build documentation for sdbus-c++" ON)
+option(BUILD_DOXYGEN_DOC "Build doxygen documentation for sdbus-c++ API" OFF)
 
 if(BUILD_DOC)
     add_subdirectory("${CMAKE_SOURCE_DIR}/doc")

README.md

@@ -26,7 +26,11 @@ $ sudo make install
 
 * `BUILD_DOC` [boolean]
 
-  Option for building Doxygen documentation of sdbus-c++ API. If `BUILD_DOC` is enabled, the documentation must still be built explicitly through `make doc`. Default value: `ON`. Use `-DBUILD_DOC=OFF` to disable searching for Doxygen and building Doxygen documentation of sdbus-c++ API.
+  Option for including sdbus-c++ documentation files and tutorials. Default value: `ON`. With this option turned on, you may also enable/disable the following option:
+
+    * `BUILD_DOXYGEN_DOC` [boolean]
+
+      Option for building Doxygen documentation of sdbus-c++ API. If enabled, the documentation must still be built explicitly through `make doc`. Default value: `OFF`. Use `-DBUILD_DOXYGEN_DOC=OFF` to disable searching for Doxygen and building Doxygen documentation of sdbus-c++ API.
 
 * `BUILD_TESTS` [boolean]
 

doc/CMakeLists.txt

@@ -2,7 +2,8 @@
 
 find_package(Doxygen)
 
-if(DOXYGEN_FOUND)
+if(BUILD_DOXYGEN_DOC)
+    if(DOXYGEN_FOUND)
         configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
 
         add_custom_target(doc
@@ -12,8 +13,9 @@ if(DOXYGEN_FOUND)
             VERBATIM)
 
         install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html DESTINATION ${CMAKE_INSTALL_DOCDIR} OPTIONAL)
-else()
+    else()
         message(WARNING "Documentation enabled, but Doxygen cannot be found")
+    endif()
 endif()
 
 install(FILES sdbus-c++-class-diagram.png