Add target 'make doc' to cmakelists.txt

Change-Id: I382201b02cf3cc66bc64bd305d7f8549e25c2bb9


[ROCm/hip commit: 39ae4c25c1]

projects/hip/CMakeLists.txt

@@ -134,9 +134,12 @@ if(HIP_PLATFORM STREQUAL "hcc")
         #add_library(hip_hcc STATIC ${SOURCE_FILES})
         add_library(hip_hcc OBJECT ${SOURCE_FILES})
     endif()
-
 endif()
 
+# Build doxygen documentation
+add_custom_target(doc COMMAND HIP_PATH=${CMAKE_CURRENT_SOURCE_DIR} doxygen ${CMAKE_CURRENT_SOURCE_DIR}/docs/doxygen-input/doxy.cfg
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/docs)
+
 #############################
 # Install steps
 #############################