diff --git a/Makefile b/Makefile
index d3c7345..a76fa57 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,21 @@
-CFLAGS = -Wall -Wextra -pedantic -lX11 -lXft -I/usr/include/freetype2
+include config.mk
 
-PREFIX ?= /usr/local
-CC ?= cc
+SRC = popup.c
+OBJ = $(SRC:.c=.o)
 
-all: herbe
+all: options popup
 
-config.h: config.def.h
-	cp config.def.h config.h
+options:
+	@echo popup build options:
+	@echo "CFLAGS   = $(CFLAGS)"
+	@echo "LDFLAGS  = $(LDFLAGS)"
+	@echo "CC       = $(CC)"
 
-herbe: popup.c config.h
-	$(CC) popup.c $(CFLAGS) -o popup
+.c.o:
+	$(CC) -c $(CFLAGS) $<
+
+popup: popup.o
+	$(CC) -o $@ popup.o $(LDFLAGS)
 
 install: herbe
 	mkdir -p ${DESTDIR}${PREFIX}/bin
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..6f44cd3
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,29 @@
+# paths
+PREFIX = /usr/local
+MANPREFIX = $(PREFIX)/share/man
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+# Xinerama, comment if you don't want it
+XINERAMALIBS  = -lXinerama
+XINERAMAFLAGS = -DXINERAMA
+
+# freetype
+FREETYPELIBS = -lfontconfig -lXft
+FREETYPEINC = /usr/include/freetype2
+# OpenBSD (uncomment)
+#FREETYPEINC = $(X11INC)/freetype2
+#MANPREFIX = ${PREFIX}/man
+
+# includes and libs
+INCS = -I$(X11INC) -I$(FREETYPEINC)
+LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(FREETYPELIBS)
+
+# flags
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS)
+CFLAGS   = -std=c99 -pedantic -Wall -Os $(INCS) $(CPPFLAGS)
+LDFLAGS  = $(LIBS)
+
+# compiler and linker
+CC = cc