1 files changed, 55 insertions, 0 deletions
diff --git a/common.mk b/common.mk
new file mode 100644
index 0000000..41f5c79
--- /dev/null
+++ b/common.mk
@@ -0,0 +1,55 @@
+# Copyright © 2015 Luke Shumaker
+# This work is free. You can redistribute it and/or modify it under the
+# terms of the Do What The Fuck You Want To Public License, Version 2,
+# as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.
+
+rel = $(patsubst $(abspath .)/%,./%,$(abspath $1))
+
+all: build
+.PHONY: all
+
+include $(addsuffix /Makefile,$(subdirs))
+
+generate: $(generate)
+.PHONY: generate
+
+configure: generate $(configure)
+.PHONY: configure
+
+build: configure $(build)
+.PHONY: build
+
+install: build $(install)
+.PHONY: install
+
+# un-build
+clean:
+	rm -rf -- $(build) $(build_secondary)
+.PHONY: clean
+
+# un-configure
+distclean: clean
+	rm -rf -- $(configure) $(configure_secondary)
+.PHONY: distclean
+
+# un-generate
+maintainer-clean: distclean
+	rm -rf -- $(generate) $(generate_secondary)
+.PHONY: maintainer-clean
+
+# un-install
+uninstall:
+	rm -f -- $(install)
+	rmdir -p -- $(sort $(dir $(install))) 2>/dev/null || true
+.PHONY: uninstall
+
+
+# Now, this is magic.  It stores the values of environment variables,
+# so that if you change them in a way that would cause something to be
+# rebuilt, then Make knows.
+.var.%: FORCE
+	$(Q)printf '%s' '$($*)' > .tmp$@ && { cmp -s .tmp$@ $@ && rm -f -- .tmp$@ || mv -Tf .tmp$@ $@; } || { rm -f -- .tmp$@; false; }
+
+.DELETE_ON_ERROR:
+.SECONDARY:
+.PHONY: FORCE