diff --git a/make/defs.mk b/make/defs.mk
index d22a60d3..e9750192 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -149,6 +149,12 @@ MEMBERS     = $(LIB_A)($(OBJ))
 #YAMD        = yamd-
 #EFENCE      = -lefence
 #CFLAGS    += -DNDEBUG -O2 -g $(INCLUDE) $(LOCAL_CFLAGS) #production
+
+ifeq ($(DEVELOPMENT),true)
+CFLAGS           += -D_DEVELOPMENT_
+CPPFLAGS         += -D_DEVELOPMENT_
+endif
+
 CFLAGS      += $(LOCAL_CFLAGS) $(PROJECT_CFLAGS) $(YLIB_CFLAGS) $(INCLUDE)  
 CPPFLAGS    += $(LOCAL_CPPFLAGS) $(PROJECT_CPPFLAGS)  $(YLIB_CPPFLAGS) $(INCLUDE)  
 LDFFTW    = -lrfftw -lfftw -lm
diff --git a/make/rules.mk b/make/rules.mk
index 530388a7..52caf92a 100644
--- a/make/rules.mk
+++ b/make/rules.mk
@@ -278,3 +278,14 @@ echo-ldflags:
 	@echo PROJECTLIB_LDFLAGS = $(PROJECTLIB_LDFLAGS)
 	@echo PROJECT_LDFLAGS = $(PROJECT_LDFLAGS)
 	@echo LPPFLAGS = $(LPPFLAGS)
+
+echo-cflags:
+	@echo LOCAL_CFLAGS = $(LOCAL_CFLAGS)
+	@echo PROJECT_CFLAGS = $(PROJECT_CFLAGS)
+	@echo CFLAGS = $(CFLAGS)
+	@echo LOCAL_CPPFLAGS = $(LOCAL_CPPFLAGS)
+	@echo PROJECT_CPPFLAGS = $(PROJECT_CPPFLAGS)
+	@echo CPPFLAGS = $(CPPFLAGS)
+
+echo-development:
+	echo DEVELOPMENT = $(DEVELOPMENT)