diff --git a/Makefile b/Makefile
index d20b5cb..b0e070d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 # CC=gcc
-CFLAGS:=-Wall -Wextra -Wpedantic -ggdb $(shell pkg-config --cflags ncurses readline)
-LDLIBS=-I ${CHDRD} $(shell pkg-config --libs ncurses readline)
+CFLAGS:=-Wall -Wextra -Wpedantic
+CPPFLAGS:=-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600
+LDLIBS=-I ${CHDRD} -lncurses -ltinfo -lreadline
 LEX:=flex
 
 LEXD:=src/
@@ -19,6 +20,16 @@ CHDR:=$(addsuffix .gch,$(subst ${HDRD},${CHDRD},${HDR}))
 
 OUTPUT:=csope
 
+ifeq (${DEBUG},1)
+	CFLAGS += -Og -ggdb
+else
+	CFLAGS += -O3 -flto=auto -fomit-frame-pointer
+endif
+
+ifdef SAN
+	CFLAGS += -fsanitize=${SAN}
+endif
+
 main: ${CHDR} ${OBJ}
 	${LINK.c} ${OBJ} -o ${OUTPUT} ${LDLIBS}