--- Makefile.in.orig	2009-04-30 17:30:14.000000000 +0200
+++ Makefile.in	2009-04-30 17:30:14.000000000 +0200
@@ -28,7 +28,8 @@
 LDSHARED=$(CC)
 CPP=$(CC) -E
 
-LIBS=libz.a
+LIBS=
+STATICLIB=libz.a
 SHAREDLIB=libz.so
 SHAREDLIBV=libz.so.1.2.3
 SHAREDLIBM=libz.so.1
@@ -40,6 +41,8 @@
 SHELL=/bin/sh
 EXE=
 
+DESTDIR =
+
 prefix = /usr/local
 exec_prefix = ${prefix}
 libdir = ${exec_prefix}/lib
@@ -68,7 +71,7 @@
 	  echo '		*** zlib test FAILED ***'; \
 	fi
 
-libz.a: $(OBJS) $(OBJA)
+$(STATICLIB): $(OBJS) $(OBJA)
 	$(AR) $(ARFLAGS) $@ $(OBJS) $(OBJA)
 	-@ ($(RANLIB) $@ || true) >/dev/null 2>&1
 
@@ -91,23 +94,23 @@
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
-	cp zlib.h zconf.h $(includedir)
-	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
-	cp $(LIBS) $(libdir)
-	cd $(libdir); chmod 755 $(LIBS)
-	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-	cd $(libdir); if test -f $(SHAREDLIBV); then \
+	-@if [ ! -d $(DESTDIR)$(exec_prefix) ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
+	-@if [ ! -d $(DESTDIR)$(includedir)  ]; then mkdir -p $(DESTDIR)$(includedir); fi
+	-@if [ ! -d $(DESTDIR)$(libdir)      ]; then mkdir -p $(DESTDIR)$(libdir); fi
+	-@if [ ! -d $(DESTDIR)$(man3dir)     ]; then mkdir -p $(DESTDIR)$(man3dir); fi
+	cp zlib.h zconf.h $(DESTDIR)$(includedir)
+	chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+	cp $(STATICLIB) $(SHAREDLIBV) $(DESTDIR)$(libdir)
+	cd $(DESTDIR)$(libdir); chmod 755 $(LIBS)
+	-@(cd $(DESTDIR)$(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+	cd $(DESTDIR)$(libdir); if test -f $(SHAREDLIBV); then \
 	  rm -f $(SHAREDLIB) $(SHAREDLIBM); \
 	  ln -s $(SHAREDLIBV) $(SHAREDLIB); \
 	  ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
 	  (ldconfig || true)  >/dev/null 2>&1; \
 	fi
-	cp zlib.3 $(man3dir)
-	chmod 644 $(man3dir)/zlib.3
+	cp zlib.3 $(DESTDIR)$(man3dir)
+	chmod 644 $(DESTDIR)$(man3dir)/zlib.3
 # The ranlib in install is needed on NeXTSTEP which checks file times
 # ldconfig is for Linux