Makefile updates:

Turn on optimization
Remove some redundancy in FLAGS

lib/ack/libd/Makefile

@@ -8,7 +8,7 @@
 # routines are found in libc.a.  (The printf and scanf need floating point
 # for the %f formats, whether you use them or not.)
 
-CPPFLAGS+=-O -D_MINIX -D_POSIX_SOURCE -I${.CURDIR}/../../libc/stdio
+CPPFLAGS+=-I${.CURDIR}/../../libc/stdio
 
 LIB=	d
 

lib/ack/libe/Makefile

@@ -4,7 +4,7 @@
 
 LIB=		e
 
-AFLAGS+=-O -D_MINIX -D_POSIX_SOURCE -Was-ack
+AFLAGS+=-Was-ack
 
 .include "${.CURDIR}/arch/${ARCH}/em/Makefile.inc"
 .include "${.CURDIR}/arch/${ARCH}/head/Makefile.inc"

lib/ack/libfp/Makefile

@@ -6,7 +6,7 @@
 .fc.o:
 	${_MKTARGET_COMPILE}
 	cp ${.IMPSRC} tmp.c
-	cc -O -I${.CURDIR} -D_MINIX -D_POSIX_SOURCE -S tmp.c
+	cc -I${.CURDIR} ${CFLAGS} -S tmp.c
 	sed -f ${.CURDIR}/FP.script tmp.s > ${.PREFIX}.s
 	cc -I${.CURDIR} -c -o ${.TARGET} ${.PREFIX}.s
 	rm  -f tmp.c tmp.s ${PREFIX}.s

lib/ack/liby/Makefile

@@ -1,7 +1,5 @@
 # Makefile for liby
 
-CPPFLAGS+=-O -D_MINIX -D_POSIX_SOURCE
-
 LIB=	y
 
 SRCS=	\