$OpenBSD$
--- Makefile.orig	Sun Mar 21 00:09:58 2010
+++ Makefile	Sun Mar 21 00:10:18 2010
@@ -1,6 +1,6 @@
-CXXFLAGS=-Wall -Wextra -pedantic -Wfloat-equal -Wcast-qual -Wlogical-op -O2 -DNDEBUG
+CXXFLAGS?=-Wall -Wextra -pedantic -Wfloat-equal -Wcast-qual -Wlogical-op -O2 -DNDEBUG
 CXX=g++
-BIN=${DESTDIR}/usr/bin
+BIN=${PREFIX}/bin
 
 # For 'make man': sudo apt-get install xsltproc docbook-xsl docbook-xml
 DB2MAN=/usr/share/sgml/docbook/stylesheet/xsl/nwalsh/manpages/docbook.xsl
