--- /dev/null
+--- palo/Makefile
++++ palo/Makefile
+@@ -11,10 +11,11 @@
+
+ OS := $(shell uname -s)
+ CC=gcc
++
++CFLAGS ?= -g -O
++CFLAGS += -I../include -I../lib
+ ifeq ($(strip ${OS}),HP-UX)
+-CFLAGS=-g -O -I../include -I../lib -I$(PA)/include
+-else
+-CFLAGS=-g -O -I../include -I../lib
++CFLAGS += -I$(PA)/include
+ endif
+
+ # LDFLAGS=-Wl,-Bstatic
+--- ipl/Makefile
++++ ipl/Makefile
+@@ -21,7 +21,8 @@
+ # Source sharing with palo
+ VPATH=../lib:.
+
+-CFLAGS = -I. -I../lib -I../include -O2 -mdisable-fpregs -Wall
++CFLAGS ?= -O2
++CFLAGS += -I. -I../lib -I../include -mdisable-fpregs -Wall
+ LDFLAGS = -N --section-start .init=0x60000 -e '$$START$$'
+
+ all: iplelf