[doxygen] add include path to allow macro retrieval

Author: 3nids

cmake_templates/Doxyfile.in

@@ -1324,7 +1324,7 @@ SEARCH_INCLUDES        = YES
 # contain include files that are not input files but should be processed by
 # the preprocessor.
 
-INCLUDE_PATH           =
+INCLUDE_PATH           = @DOXYGEN_INCLUDE_PATH@
 
 # You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
 # patterns (like *.h and *.hpp) to filter out the header-files in the

doc/CMakeLists.txt

@@ -45,6 +45,11 @@ IF(WITH_APIDOC)
       SET(WITH_QHP NO)
     ENDIF(GENERATE_QHP)
 
+    SET(DOXYGEN_INCLUDE_PATH
+      ${CMAKE_SOURCE_DIR}/src/core
+    )
+    STRING(REPLACE ";" " " DOXYGEN_INCLUDE_PATH "${DOXYGEN_INCLUDE_PATH}")
+
     SET(DOXYGEN_INPUT
       ${CMAKE_SOURCE_DIR}/doc
       ${CMAKE_SOURCE_DIR}/src/core