add README.md to doxygen

docs/CMakeLists.txt

@@ -26,7 +26,7 @@ file(GLOB_RECURSE ALL_PUBLIC_HEADERS ${ALL_PUBLIC_HEADER_DIR})
 
 # setup configuring of doxygen
 # Caveat(s.schulz): Make sure there are not spaces within the paths.
-set(DOXYGEN_INPUT_DIR ${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/src ${PROJECT_SOURCE_DIR}/example)
+set(DOXYGEN_INPUT_DIR ${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/src ${PROJECT_SOURCE_DIR}/example ${PROJECT_SOURCE_DIR}/README.md)
 string(REPLACE ";" "\" \"" DOXYGEN_INPUT_DIR "${DOXYGEN_INPUT_DIR}")
 set(DOXYGEN_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/doc/doxygen)
 set(DOXYGEN_INDEX_FILE ${DOXYGEN_OUTPUT_DIR}/xml/index.xml)
@@ -34,7 +34,6 @@ set(DOXYFILE_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
 set(DOXYFILE_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
 set(DOXYGEN_INTERNAL_DOCS NO)
 set(DOXYGEN_EXAMPLE_PATH ${PROJECT_SOURCE_DIR}/example)
-set(DOXYGEN_USE_MDFILE_AS_MAINPAGE ${PROJECT_SOURCE_DIR}/README.md)
 # configure doxygen config file
 configure_file(${DOXYFILE_IN} ${DOXYFILE_OUT} @ONLY)
 

docs/Doxyfile.in

@@ -961,7 +961,7 @@ FILTER_SOURCE_PATTERNS =
 # (index.html). This can be useful if you have a project on for instance GitHub
 # and want to reuse the introduction page also for the doxygen output.
 
-USE_MDFILE_AS_MAINPAGE = "@DOXYGEN_USE_MDFILE_AS_MAINPAGE@"
+USE_MDFILE_AS_MAINPAGE = README.md
 
 #---------------------------------------------------------------------------
 # Configuration options related to source browsing