* add redis backend to build system

src/backends/CMakeLists.txt

@@ -4,6 +4,11 @@ set(BACKENDS "")
 add_library("f2b_backend_exec" MODULE "exec.c")
 list(APPEND BACKENDS "f2b_backend_exec")
 
+# TODO: check if library available
+add_library("f2b_backend_redis" MODULE "redis.c")
+target_link_libraries("f2b_backend_redis" "hiredis")
+list(APPEND BACKENDS "f2b_backend_redis")
+
 message(STATUS "- Backends : ${BACKENDS}")
 
 install(TARGETS ${BACKENDS}