diff --git a/Makefile b/Makefile
index 5232e12..65daddd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,15 @@
 include config.mk
+include sources.mk
 
 ifeq (${CC},clang)
-
-CFLAGS :=\
+CFLAGS =\
 	-std=c99\
 	-Weverything\
 	-Wno-padded\
 	-Wno-disabled-macro-expansion\
-	-pedantic\
-	${CFLAGS}
-
+	-pedantic
 else ifeq (${CC},gcc)
-
-CFLAGS :=\
+CFLAGS =\
 	-std=c99\
 	-Wall\
 	-Wextra\
@@ -29,13 +26,15 @@ CFLAGS :=\
 	-Wshadow\
 	-Wunsafe-loop-optimizations\
 	-Wparentheses\
-	-pedantic\
-	${CFLAGS}
-
+	-pedantic
+endif
+
+ifeq (${DEBUG},1)
+CFLAGS += -g
+else
+CFLAGS += -O2
 endif
 
-SRC = dynarray.c
-HDR = dynarray.h
 OBJ = ${SRC:.c=.o}
 
 all: ${OBJ}
diff --git a/config.mk b/config.mk
index f83eb9f..71c6bed 100644
--- a/config.mk
+++ b/config.mk
@@ -1,3 +1,4 @@
-VERSION = 1.1.1
+VERSION = 1.1.2
 PREFIX  = /usr/local
 CC      = clang
+DEBUG   = 1
diff --git a/sources.mk b/sources.mk
new file mode 100644
index 0000000..00466ec
--- /dev/null
+++ b/sources.mk
@@ -0,0 +1,2 @@
+SRC = dynarray.c
+HDR = dynarray.h