Merge pull request #6159 from vmihalko/fix-cmake-doc-build

Fix CMake doc target

Author: NlightNFotis

src/CMakeLists.txt

@@ -5,26 +5,16 @@ find_package(FLEX REQUIRED)
 
 find_package(Doxygen)
 if(DOXYGEN_FOUND)
-  set(ROOT_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/..")
-  set(ROOT_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/..")
-  set(ORIGINAL_DOXYFILE "${CMAKE_CURRENT_SOURCE_DIR}/doxyfile")
-  set(CONFIGURED_DOXYFILE "${ROOT_BINARY_DIR}/doxyfile")
-  set(DOC_INPUT_DIRECTORY "${ROOT_SOURCE_DIR}/doc")
-  set(DOC_OUTPUT_DIRECTORY "${ROOT_BINARY_DIR}/doc")
+  set(CONFIGURED_DOXYFILE "${CMAKE_BINARY_DIR}/doxyfile")
+  set(DOC_INPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/doc")
+  set(DOC_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/doc")
 
-  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/doxyfile.override.in" "${CONFIGURED_DOXYFILE}")
+  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/doxyfile.override.in" "${CONFIGURED_DOXYFILE}" @ONLY)
   add_custom_target(doc
       COMMAND "${CMAKE_COMMAND}" -E remove_directory "${DOC_OUTPUT_DIRECTORY}"
       COMMAND "${CMAKE_COMMAND}" -E copy_directory "${DOC_INPUT_DIRECTORY}" "${DOC_OUTPUT_DIRECTORY}"
       COMMAND "${DOXYGEN_EXECUTABLE}" "${CONFIGURED_DOXYFILE}"
       WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
-
-  unset(DOC_OUTPUT_DIRECTORY)
-  unset(DOC_INPUT_DIRECTORY)
-  unset(CONFIGURED_DOXYFILE)
-  unset(ORIGINAL_DOXYFILE)
-  unset(ROOT_SOURCE_DIR)
-  unset(ROOT_BINARY_DIR)
 endif(DOXYGEN_FOUND)
 
 #   Add a bison target named 'parser'.

src/doxyfile.override.in

@@ -7,6 +7,6 @@
 # configure_file; variables like @this@ are replaced by
 # cmake variables.
 
-@INCLUDE = @ORIGINAL_DOXYFILE@
+@INCLUDE = @CMAKE_SOURCE_DIR@/src/doxyfile
 
 OUTPUT_DIRECTORY = @DOC_OUTPUT_DIRECTORY@