Update config.mk

config.mk

@@ -1,5 +1,5 @@
 # dwm version
-VERSION = 6.4
+VERSION = 6.5
 
 # Customize below to fit your system
 
@@ -25,10 +25,15 @@ FREETYPEINC = /usr/include/freetype2
 INCS = -I${X11INC} -I${FREETYPEINC}
 LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lX11-xcb -lxcb -lxcb-res
 
+# Optional compiler optimisations may create smaller binaries and
+# faster code, but increases compile time.
+# See https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
+#OPTIMISATIONS = -march=native -flto=auto -O3
+
 # flags
 CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
 #CFLAGS   = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
-CFLAGS   = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS}
+CFLAGS   = ${OPTIMISATIONS} -std=c99 -pedantic -Wall -Wno-unused-function -Wno-deprecated-declarations ${INCS} ${CPPFLAGS}
 LDFLAGS  = ${LIBS}
 
 # Solaris