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author | Luke Shumaker <lukeshu@sbcglobal.net> | 2017-01-28 18:00:39 -0500 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2017-01-28 18:00:39 -0500 |
commit | 448b71ad9d9387571e9a92f2fe4598ab5346c58c (patch) | |
tree | f0ab46636acfd76f8ca1cc8003604c4b56552d49 /build-aux/Makefile.once.head/00-var.mk | |
parent | 84704dd28c3fbf50053afe26cfdf81539668c10a (diff) | |
parent | 36e62cbb6bdb17c318c00ee55f8049930438aa83 (diff) |
Merge remote-tracking branch 'autothing/v3/master'
Diffstat (limited to 'build-aux/Makefile.once.head/00-var.mk')
-rw-r--r-- | build-aux/Makefile.once.head/00-var.mk | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/build-aux/Makefile.once.head/00-var.mk b/build-aux/Makefile.once.head/00-var.mk new file mode 100644 index 0000000..1f50f21 --- /dev/null +++ b/build-aux/Makefile.once.head/00-var.mk @@ -0,0 +1,33 @@ +# 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 <http://www.gnu.org/licenses/>. + +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 |