Build xbps-{bin,cmpver,digest,pkgdb,repo} as static, and install them

as foo.static.

Updated README to note the new requirements for it. It will be used
to reduce the number of dependencies when building packages in
the chroot.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20091015222234-360i67zychjge3nh

prog.mk

@@ -1,23 +1,26 @@
-include $(TOPDIR)/vars.mk
-
+BIN_STATIC  ?= $(BIN).static
 OBJS ?=	main.o
 
-all: $(BIN)
+all: $(BIN) $(BIN_STATIC)
 .PHONY: all
 
+$(BIN_STATIC): $(OBJS)
+	$(CC) -static $^ $(LDFLAGS) $(STATIC_LIBS) -o $@
+
 $(BIN): $(OBJS)
-	$(CC) $(LDFLAGS) $^ -o $@
+	$(CC) $^ $(LDFLAGS) -o $@
 
 .PHONY: clean
 clean: clean-bins clean-objs
 
 clean-bins:
-	-rm -f $(BIN)
+	-rm -f $(BIN) $(BIN_STATIC)
 
 clean-objs:
 	-rm -f $(OBJS)
 
 .PHONY: install
-install: $(BIN)
+install: $(BIN) $(BIN_STATIC)
 	install -d $(SBINDIR)
 	install $(INSTALL_STRIPPED) -m 755 $(BIN) $(SBINDIR)
+	install $(INSTALL_STRIPPED) -m 755 $(BIN_STATIC) $(SBINDIR)