doc: Move Doxyfile into doc subdir

.gitignore

@@ -83,7 +83,7 @@
 /Testing/
 
 # ...and build artifacts.
-/doc
+/doc/html
 /libjson-c.a
 /libjson-c.so
 /libjson-c.so.*

CMakeLists.txt

@@ -361,24 +361,7 @@ set(JSON_C_SOURCES
 include_directories(${PROJECT_SOURCE_DIR})
 include_directories(${PROJECT_BINARY_DIR})
 
-# generate doxygen documentation for json-c API
-
-find_package(Doxygen)
-option(BUILD_DOCUMENTATION "Create and install the HTML based API documentation(requires Doxygen)" ${DOXYGEN_FOUND})
-
-if (DOXYGEN_FOUND)
-
-	configure_file(${PROJECT_SOURCE_DIR}/Doxyfile.in
-	  ${PROJECT_BINARY_DIR}/Doxyfile)
-	message(STATUS "Written ${PROJECT_BINARY_DIR}/Doxyfile")
-
-	add_custom_target(doc
-	COMMAND ${DOXYGEN_EXECUTABLE} ${PROJECT_BINARY_DIR}/Doxyfile
-		WORKING_DIRECTORY ${PROJECT_BINARY_DIR})
-
-else (DOXYGEN_FOUND)
-	message("Warning: doxygen not found, the 'doc' target will not be included")
-endif(DOXYGEN_FOUND)
+add_subdirectory(doc)
 
 # uninstall
 add_custom_target(uninstall

doc/CMakeLists.txt

@@ -0,0 +1,16 @@
+# generate doxygen documentation for json-c API
+
+find_package(Doxygen)
+
+if (DOXYGEN_FOUND)
+
+	configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in
+	  ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+	message(STATUS "Wrote ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile")
+
+	add_custom_target(doc
+	COMMAND ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+
+else (DOXYGEN_FOUND)
+	message("Warning: doxygen not found, the 'doc' target will not be included")
+endif(DOXYGEN_FOUND)

Doxyfile.in → doc/Doxyfile.in

@@ -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       = @CMAKE_CURRENT_BINARY_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