# Copyright (C) 2016 Luke Shumaker # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see . mod.var.description = Depend on the values of variables define mod.var.doc # Inputs: # (user-defined) # Outputs: # Target : `$(outdir)/.var.%` # Directory variable: `at.targets` # # It's a well-known secret that many files generated by a Makefile vary with # the values of particular variables, but that GNU Make can't track these # dependencies. Well, with some cleverness, it actually can! # # With this module, to depend on the value of a variable, depend on # `$(outdir)/.var.VARNAME`. endef mod.var.doc := $(value mod.var.doc) .PHONY: _var.FORCE