Please install GNU tar. \
))
+define Require/git
+ which git-clone
+endef
+
+$(eval $(call Require,git, \
+ Please install git. \
+))
+
+$(eval $(call RequireCommand,svn, \
+ Please install the subversion client. \
+))
+
$(eval $(call RequireCommand,autoconf, \
Please install GNU autoconf. \
))