CMake: fix linking with gtest & cycles enabled

source/blender/python/intern/CMakeLists.txt

@@ -33,7 +33,6 @@ set(INC
 	../../../../intern/clog
 	../../../../intern/guardedalloc
 	../../../../intern/opencolorio
-	../../../../intern/cycles/blender
 )
 
 set(INC_SYS
@@ -167,6 +166,12 @@ if(WITH_COMPOSITOR)
 endif()
 
 if(WITH_CYCLES)
+	list(APPEND INC
+		../../../../intern/cycles/blender
+	)
+	list(APPEND LIB
+		bf_intern_cycles
+	)
 	add_definitions(-DWITH_CYCLES)
 endif()
 

source/blender/python/intern/bpy_interface.c

@@ -57,7 +57,9 @@
 #include "BKE_main.h"
 #include "BKE_text.h"
 
-#include "CCL_api.h"
+#ifdef WITH_CYCLES
+#  include "CCL_api.h"
+#endif
 
 #include "BPY_extern.h"