cmake: make sure all DKS related libaries and include paths are properly set.

cmake/FindDKS.cmake

@@ -2,7 +2,8 @@
 #
 # This module defines:
 #   DKS_INCLUDE_DIR, where to find DKSBaseMuSR.h
-#   DKS_LIBRARY, shared library to be linked against if using DKS
+#   DKS_LIBS, shared library to be linked against if using DKS
+#   DKS_CFLAGS, compiler flags needed for DKS
 #
 # **as35** since I currently also maintaing the DKS library, it should add
 # a DKSConfig.cmake which eventually will make this module obsolate. This 
@@ -25,6 +26,23 @@ find_library(DKS_LIBRARY dksshared
         "$ENV{HOME}/Applications/DKS/exec/lib"
 )
 
+if (CUDA_FOUND)
+  set(DKS_CFLAGS -DDKS_OPENCL -DDKS_CUDA -I${DKS_INCLUDE_DIR} -I${CUDA_INCLUDE_DIRS})
+  set(DKS_LIBS ${CUDA_LIBRARIES} ${DKS_LIBRARY})
+else (CUDA_FOUND)
+  if (OpenCL_FOUND)
+    if (APPLE)
+      set(DKS_CFLAGS -DDKS_OPENCL -I${DKS_INCLUDE_DIR} -I${OpenCL_INCLUDE_DIRS})
+      set(DKS_LIBS ${OpenCL_LIBRARY} ${DKS_LIBRARY})
+    else (APPLE)
+      set(DKS_CFLAGS -DDKS_OPENCL -I${DKS_INCLUDE_DIR} -I${OpenCL_INCLUDE_DIRS})
+      set(DKS_LIBS ${OpenCL_LIBRARY} ${DKS_LIBRARY})
+    endif (APPLE)
+  else (OpenCL_FOUND)
+    message(FATAL "neither CUDA nor OpenCL found when looking for DKS.")
+  endif (OpenCL_FOUND)
+endif (CUDA_FOUND)
+
 # as35 set here the DKS version explicitly. This is VERY ugly and should be fixed
 #      asap by using a package
 set(DKS_VERSION "1.1.3")
@@ -33,15 +51,17 @@ set(DKS_VERSION "1.1.3")
 # all listed variables are TRUE
 include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
 find_package_handle_standard_args(DKS
-                                  REQUIRED_VARS DKS_LIBRARY DKS_INCLUDE_DIR
+                                  REQUIRED_VARS DKS_CFLAGS DKS_LIBS DKS_INCLUDE_DIR
                                   VERSION_VAR DKS_VERSION)
 
 if (NOT DKS_FOUND)
-  unset(DKS_LIBRARY)
+  unset(DKS_CFLAGS)
+  unset(DKS_LIBS)
 endif (NOT DKS_FOUND)
 
 mark_as_advanced(
-  DKS_INCLUDE_DIR 
-  DKS_LIBRARY
+  DKS_INCLUDE_DIR
+  DKS_CFLAGS 
+  DKS_LIBS
 )