-INCS = -I/usr/include -I${X11INC}
-LIBS = -L/usr/lib -lc -L${X11LIB} -lX11
-
-CPPFLAGS = -D_GNU_SOURCE
-# -Wno-unused-function for routines not activated by user
-CFLAGS = -std=c99 -pedantic -Wno-unused-function -Wall -Wextra -Os -fstack-protector-strong -fstack-check -fPIE ${INCS} ${CPPFLAGS}
-LDFLAGS = ${LIBS}
+# flags
+CPPFLAGS = -I$(X11INC) -D_DEFAULT_SOURCE
+CFLAGS = -std=c99 -pedantic -Wall -Wextra -Os
+LDFLAGS = -L$(X11LIB) -s
+# OpenBSD: add -lossaudio
+LDLIBS = -lX11