--- a/Makefile	Sun Aug 30 12:38:46 2009 +0300
+++ b/Makefile	Wed Sep 02 22:18:21 2009 +0300
@@ -4,10 +4,36 @@
   $(error HOME env var and prefix var are not set!)
 endif
 
+host_os = linux
+ifneq '' '$(WINDRIVE)'         # TODO
+  host_os = windows
+endif
+
 .PHONY: all install uninstall clean distclean
 
+ALL_DIR = all
+LINUX_DIR = linux
+WIN_DIR = win
+
+ifeq 'linux' '$(host_os)'
+  DIRS = all linux
+endif
+ifeq 'windows' '$(host_os)'
+  DIRS = all win
+endif
+
 install:
-	install -m 440 .mailsign $(HOME)
+	for srcdir in $(DIRS); do \
+		for item in `cd  $$srcdir; find $$PWD -type f`; do \
+			file=$${item#$${PWD}/$${srcdir}/}; \
+			fname=$${item##*/}; \
+			dir=$${item#$${PWD}/$${srcdir}}; \
+			dir=$${dir%/$${fname}}; \
+			dir=$${dir#/}; \
+			echo mkdir -p $(HOME)/$$dir; \
+			echo install -m 660 $$srcdir/$$file $(HOME)/$$dir; \
+		done; \
+	done
 
 uninstall:
 	rm -f $(HOME)/.mailsign