# Try to find Graphviz. 
# This will define:
# GRAPHVIZ_FOUND - system has Graphviz
# GRAPHVIZ_INCLUDE_DIR - the Graphviz include directory
# GRAPHVIZ_LIBRARY - Link these to use Graphviz
# GRAPHVIZ_DEFINITIONS - Compiler switches required for using Graphviz

if(GRAPHVIZ_INCLUDE_DIR AND GRAPHVIZ_CDT_LIBRARY AND GRAPHVIZ_GRAPH_LIBRARY AND GRAPHVIZ_PATHPLAN_LIBRARY)
  set(GRAPHVIZ_FIND_QUIETLY TRUE)
endif()


find_path(GRAPHVIZ_INCLUDE_DIR graphviz/graph.h HINTS $ENV{GRAPHVIZ_DIR}/include ${GRAPHVIZ_DIR}/include)

find_library(GRAPHVIZ_CDT_LIBRARY NAMES cdt HINTS $ENV{GRAPHVIZ_DIR}/lib ${GRAPHVIZ_DIR}/lib)
find_library(GRAPHVIZ_GVC_LIBRARY NAMES gvc HINTS $ENV{GRAPHVIZ_DIR}/lib ${GRAPHVIZ_DIR}/lib)
find_library(GRAPHVIZ_GRAPH_LIBRARY NAMES graph HINTS $ENV{GRAPHVIZ_DIR}/lib ${GRAPHVIZ_DIR}/lib)
find_library(GRAPHVIZ_PATHPLAN_LIBRARY NAMES pathplan HINTS $ENV{GRAPHVIZ_DIR}/lib ${GRAPHVIZ_DIR}/lib)
	
if(GRAPHVIZ_INCLUDE_DIR AND GRAPHVIZ_CDT_LIBRARY AND GRAPHVIZ_GVC_LIBRARY AND GRAPHVIZ_GRAPH_LIBRARY AND GRAPHVIZ_PATHPLAN_LIBRARY)
  set(GRAPHVIZ_FOUND 1)
else()
  set(GRAPHVIZ_FOUND 0)
endif()

if(GRAPHVIZ_FOUND AND NOT GRAPHVIZ_FIND_QUIETLY)
  message(STATUS "Found Graphviz: ${GRAPHVIZ_CDT_LIBRARY} ${GRAPHVIZ_GVC_LIBRARY} ${GRAPHVIZ_GRAPH_LIBRARY} ${GRAPHVIZ_PATHPLAN_LIBRARY}")
endif()

mark_as_advanced(GRAPHVIZ_INCLUDE_DIR 
                 GRAPHVIZ_CDT_LIBRARY
                 GRAPHVIZ_GRAPH_LIBRARY
                 GRAPHVIZ_GVC_LIBRARY
                 GRAPHVIZ_PATHPLAN_LIBRARY)