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-rw-r--r--third_party/nix/mk/templates.mk19
1 files changed, 19 insertions, 0 deletions
diff --git a/third_party/nix/mk/templates.mk b/third_party/nix/mk/templates.mk
new file mode 100644
index 000000000000..c7ac7afbff27
--- /dev/null
+++ b/third_party/nix/mk/templates.mk
@@ -0,0 +1,19 @@
+template-files :=
+
+# Create the file $(1) from $(1).in by running config.status (which
+# substitutes all ‘@var@’ variables set by the configure script).
+define instantiate-template
+
+  clean-files += $(1)
+
+endef
+
+ifneq ($(MAKECMDGOALS), clean)
+
+%.h: %.h.in
+	$(trace-gen) rm -f $@ && ./config.status --quiet --header=$@
+
+%: %.in
+	$(trace-gen) rm -f $@ && ./config.status --quiet --file=$@
+
+endif