-CPPFLAGS = -DVERSION=\"${VERSION}\" -D_GNU_SOURCE
-CFLAGS = -std=c99 -pedantic -Wno-unused-function -Wall -Wextra -O2 ${INCS} ${CPPFLAGS}
-LDFLAGS = ${LIBS}
+CPPFLAGS = -I$(X11INC) -D_DEFAULT_SOURCE
+CFLAGS = -std=c99 -pedantic -Wall -Wextra -Os
+LDFLAGS = -L$(X11LIB) -s
+# OpenBSD: add -lossaudio
+LDLIBS = -lX11