diff -urN bar-1.10.9.orig/Makefile.am bar-1.10.9/Makefile.am
--- bar-1.10.9.orig/Makefile.am	2007-06-06 10:44:05.000000000 -1000
+++ bar-1.10.9/Makefile.am	2010-05-19 03:34:36.000000000 -1000
@@ -12,10 +12,10 @@
 #
 
 # CFLAGS =
-CFLAGS = -O2
+CFLAGS ?= -O2
 # CFLAGS = -g -Wall
 
-LDFLAGS = -s
+LDFLAGS ?= -s
 # LDFLAGS =
 
 bin_PROGRAMS =
diff -urN bar-1.10.9.orig/Makefile.in bar-1.10.9/Makefile.in
--- bar-1.10.9.orig/Makefile.in	2007-06-28 03:11:32.000000000 -1000
+++ bar-1.10.9/Makefile.in	2010-05-19 03:35:18.000000000 -1000
@@ -128,7 +128,7 @@
 CCDEPMODE = @CCDEPMODE@
 
 # CFLAGS =
-CFLAGS = -O2
+CFLAGS ?= -O2
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
@@ -150,7 +150,7 @@
 INSTALL_SCRIPT = @INSTALL_SCRIPT@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
 # CFLAGS = -g -Wall
-LDFLAGS = -s
+LDFLAGS ?= -s
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LN_S = @LN_S@