Updated CGAL finder

cmake/FindCGAL.cmake

-# - Find CGAL
-# Find the CGAL autolinking headers.
-#
-#  CGAL_INCLUDE_DIR -  where to find CGAL.h, etc.
-#  CGAL_FOUND        - True if CGAL found.
-
-IF (CGAL_INCLUDE_DIR)
-  # Already in cache, be silent
-  SET(CGAL_FIND_QUIETLY TRUE)
-ENDIF (CGAL_INCLUDE_DIR)
-
-# Check if the base path is set
-if ( NOT CMAKE_WINDOWS_LIBS_DIR )
-  # This is the base directory for windows library search used in the finders we shipp.
-  set(CMAKE_WINDOWS_LIBS_DIR "c:/libs" CACHE STRING "Default Library search dir on windows." )
-endif()
-
-if ( CMAKE_GENERATOR MATCHES "^Visual Studio 11.*Win64" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2012/x64/")
-elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 11.*" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2012/x32/")
-elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 12.*Win64" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2013/x64/")
-elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 12.*" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2013/x32/")
-elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 14.*Win64" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2015/x64/")
-elseif ( CMAKE_GENERATOR MATCHES "^Visual Studio 14.*" )
-  SET(VS_SEARCH_PATH "${CMAKE_WINDOWS_LIBS_DIR}/vs2015/x32/")
-endif()
-
-
-GET_FILENAME_COMPONENT(module_file_path ${CMAKE_CURRENT_LIST_FILE} PATH )
-
-IF (NOT APPLE )
-	# Look for the header file.
-	FIND_PATH(CGAL_INCLUDE_DIR NAMES CGAL/auto_link/auto_link.h
-        	                   PATHS /usr/include
-					    ../../External/include
-					    "${VS_SEARCH_PATH}/CGAL-4.7/include"
-					    "C:/libs/CGAL-3.6/include"
-					    "C:/Program Files/CGAL-3.5/include"
-					    "C:/Programme/CGAL-3.5/include"
-					    "C:/libs/CGAL-3.5/include"
-					    "C:/Program Files/CGAL-3.4/include"
-					    "C:/Programme/CGAL-3.4/include"
-					    "C:/libs/CGAL-3.4/include"
-					    "C:/Programme/CGAL-3.9/include"
-					    "C:/Program Files/CGAL-3.9/include"
-					    "C:/Program Files (x86)/CGAL-3.9/include"
-					    ${module_file_path}/../../../External/include)
-ELSE( NOT APPLE)
-	# Look for the header file.
-	FIND_PATH(CGAL_INCLUDE_DIR NAMES CGAL/auto_link/auto_link.h
-        	                   PATHS "/opt/local/include"
-                 )
-
-ENDIF( NOT APPLE )
-
-
-
-MARK_AS_ADVANCED(CGAL_INCLUDE_DIR)
-
-
-# Copy the results to the output variables.
-IF(CGAL_INCLUDE_DIR )
-  SET(CGAL_FOUND 1)
-  SET(CGAL_INCLUDE_DIR ${CGAL_INCLUDE_DIR})
-  # Look for the taucs dir.
-  FIND_PATH(CGAL_TAUCS_DIR NAMES include/taucs.h
-                           PATHS ${CGAL_INCLUDE_DIR}/../auxiliary/taucs)
-
-  IF(WIN32)
-    include(CGAL_GeneratorSpecificSettings)
-    find_path(CGAL_LIBRARY_DIR 
-                NAMES "CGAL-${CGAL_TOOLSET}-mt.lib" "CGAL-${CGAL_TOOLSET}-mt-gd.lib"
-                PATHS "${CGAL_INCLUDE_DIR}/../lib"
-                DOC "Directory containing the CGAL library"
-               ) 
-    #add_definitions (-DCGAL_AUTOLINK)
-  ELSEIF( APPLE)
-    find_path(CGAL_LIBRARY_DIR 
-                NAMES "libCGAL.dylib"
-                PATHS "/opt/local/lib/"
-                DOC "Directory containing the CGAL library"
-               ) 
-    list ( APPEND CGAL_LIBRARIES CGAL CGAL_Core CGAL_ImageIO mpfr )
-    set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -frounding-math")
-    set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -frounding-math")
-
-  ELSE( WIN32 )
-    find_path(CGAL_LIBRARY_DIR
-              NAMES "libCGAL.so"
-              PATHS "/usr/lib/" "/usr/lib64" 
-              DOC "Directory containing the CGAL library"
-             )
-    list ( APPEND CGAL_LIBRARIES CGAL CGAL_Core CGAL_ImageIO CGAL_Qt4) 
-    set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -frounding-math")
-    set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -frounding-math")
-
-
-    # This is needed to link correctly against lapack
-    add_definitions (-DCGAL_USE_F2C)
-  ENDIF(WIN32)
-
-
- 
-
-ELSE(CGAL_INCLUDE_DIR )
-  SET(CGAL_FOUND 0)
-  SET(CGAL_INCLUDE_DIR)
-ENDIF(CGAL_INCLUDE_DIR )
-
-# Report the results.
-IF(NOT CGAL_FOUND)
-  SET(CGAL_DIR_MESSAGE
-    "CGAL was not found. Make sure CGAL_INCLUDE_DIR is set to the directories containing the include files for CGAL. .")
-  IF(CGAL_FIND_REQUIRED)
-      MESSAGE(FATAL_ERROR "${CGAL_DIR_MESSAGE}")
-  ELSEIF(NOT CGAL_FIND_QUIETLY)
-    MESSAGE(STATUS "${CGAL_DIR_MESSAGE}")
-  ELSE(NOT CGAL_FIND_QUIETLY)
-  ENDIF(CGAL_FIND_REQUIRED)
-ELSE (NOT CGAL_FOUND)
-  IF(NOT CGAL_FIND_QUIETLY)
-    MESSAGE(STATUS "Looking for CGAL - found")
-  ENDIF(NOT CGAL_FIND_QUIETLY)
-ENDIF(NOT CGAL_FOUND)
-
+# - Find CGAL
+# Find the CGAL autolinking headers.
+#
+#  CGAL_INCLUDE_DIR -  where to find CGAL.h, etc.
+#  CGAL_FOUND        - True if CGAL found.
+
+IF (CGAL_INCLUDE_DIR)
+  # Already in cache, be silent
+  SET(CGAL_FIND_QUIETLY TRUE)
+ENDIF (CGAL_INCLUDE_DIR)
+
+GET_FILENAME_COMPONENT(module_file_path ${CMAKE_CURRENT_LIST_FILE} PATH )
+
+IF (NOT APPLE )
+	# Look for the header file.
+	FIND_PATH(CGAL_INCLUDE_DIR NAMES CGAL/auto_link/auto_link.h
+        	                   PATHS /usr/include
+        	                         ../../External/include
+					 $ENV{CGAL_DIR}/include
+                                         "C:/libs/CGAL-3.6/include"
+   				         "C:/Program Files/CGAL-3.5/include"
+                                         "C:/Programme/CGAL-3.5/include"
+                                         "C:/libs/CGAL-3.5/include"
+                	                 "C:/Program Files/CGAL-3.4/include"
+                                         "C:/Programme/CGAL-3.4/include"
+                                         "C:/libs/CGAL-3.4/include"
+					 "C:/Programme/CGAL-3.9/include"
+					 "C:/Program Files/CGAL-3.9/include"
+					 "C:/Program Files (x86)/CGAL-3.9/include"
+	                                 ${module_file_path}/../../../External/include )
+ELSE( NOT APPLE)
+	# Look for the header file.
+	FIND_PATH(CGAL_INCLUDE_DIR NAMES CGAL/auto_link/auto_link.h
+        	                   PATHS "/opt/local/include"
+                 )
+
+ENDIF( NOT APPLE )
+
+
+
+MARK_AS_ADVANCED(CGAL_INCLUDE_DIR)
+
+if ("${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}" MATCHES ".*clang.*")
+    SET(CXX_IS_CLANG true)
+else()
+    SET(CXX_IS_CLANG false)
+endif()
+
+# Copy the results to the output variables.
+IF(CGAL_INCLUDE_DIR )
+  SET(CGAL_FOUND 1)
+  SET(CGAL_INCLUDE_DIR ${CGAL_INCLUDE_DIR})
+  # Look for the taucs dir.
+  FIND_PATH(CGAL_TAUCS_DIR NAMES include/taucs.h
+                           PATHS ${CGAL_INCLUDE_DIR}/../auxiliary/taucs)
+
+  IF(WIN32)
+    include(CGAL_GeneratorSpecificSettings)
+    find_path(CGAL_LIBRARY_DIR 
+                NAMES "CGAL-${CGAL_TOOLSET}-mt.lib" "CGAL-${CGAL_TOOLSET}-mt-gd.lib" "CGAL-${CGAL_TOOLSET}-mt-4.5.lib"
+                PATHS "${CGAL_INCLUDE_DIR}/../lib"
+                DOC "Directory containing the CGAL library"
+               ) 
+			
+    # Binary dir for DLLs			
+	find_path(CGAL_BIN_DIR 
+                NAMES "CGAL-${CGAL_TOOLSET}-mt-4.5.dll" "CGAL-${CGAL_TOOLSET}-mt-gd.dll"
+                PATHS "${CGAL_INCLUDE_DIR}/../bin"
+                DOC "Directory containing the CGAL DLLs"
+               ) 
+			   
+	MARK_AS_ADVANCED(CGAL_BIN_DIR )
+    #add_definitions (-DCGAL_AUTOLINK)
+  ELSEIF( APPLE)
+    find_path(CGAL_LIBRARY_DIR 
+                NAMES "libCGAL.dylib"
+                PATHS "/opt/local/lib/"
+                DOC "Directory containing the CGAL library"
+               ) 
+    list ( APPEND CGAL_LIBRARIES CGAL CGAL_Core CGAL_ImageIO mpfr )
+    if (NOT CXX_IS_CLANG)
+        set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -frounding-math")
+        set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -frounding-math")
+    endif()
+
+  ELSE( WIN32 )
+    find_path(CGAL_LIBRARY_DIR
+              NAMES "libCGAL.so"
+              PATHS "/usr/lib/" "/usr/lib64" 
+              DOC "Directory containing the CGAL library"
+             )
+    list ( APPEND CGAL_LIBRARIES CGAL CGAL_Core CGAL_ImageIO) 
+    if (NOT CXX_IS_CLANG)
+        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -frounding-math")
+    endif()
+
+
+    # This is needed to link correctly against lapack
+    add_definitions (-DCGAL_USE_F2C)
+  ENDIF(WIN32)
+
+
+ 
+
+ELSE(CGAL_INCLUDE_DIR )
+  SET(CGAL_FOUND 0)
+  SET(CGAL_INCLUDE_DIR)
+ENDIF(CGAL_INCLUDE_DIR )
+
+#use eigen if available
+find_package(EIGEN3)
+if ( EIGEN3_FOUND )
+  add_definitions(-DCGAL_EIGEN3_ENABLED)
+endif()
+
+# Report the results.
+IF(NOT CGAL_FOUND)
+  SET(CGAL_DIR_MESSAGE
+    "CGAL was not found. Make sure CGAL_INCLUDE_DIR is set to the directories containing the include files for CGAL. .")
+  IF(CGAL_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "${CGAL_DIR_MESSAGE}")
+  ELSEIF(NOT CGAL_FIND_QUIETLY)
+    MESSAGE(STATUS "${CGAL_DIR_MESSAGE}")
+  ELSE(NOT CGAL_FIND_QUIETLY)
+  ENDIF(CGAL_FIND_REQUIRED)
+ELSE (NOT CGAL_FOUND)
+  IF(NOT CGAL_FIND_QUIETLY)
+    MESSAGE(STATUS "Looking for CGAL - found")
+  ENDIF(NOT CGAL_FIND_QUIETLY)
+ENDIF(NOT CGAL_FOUND)
+