+add_definitions(-D_GNU_SOURCE -Wall -Werror -Wextra -pedantic)
+
+if(${EXT_PREFIX_CLASS})
+ add_definitions(-DEXT_PREFIX_CLASS=${EXT_PREFIX_CLASS})
+endif(${EXT_PREFIX_CLASS})
+
+if(${EXT_CER_ID})
+ add_definitions(-DEXT_CER_ID=${EXT_CER_ID})
+endif(${EXT_CER_ID})