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-rw-r--r--prelude.mk23
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diff --git a/prelude.mk b/prelude.mk
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+# Please see https://egort.name/blog/notes/makefile.html
+
+MAKEFLAGS += --no-builtin-rules --no-builtin-variables --warn-undefined-variables
+unexport MAKEFLAGS
+.DEFAULT_GOAL := all
+.DELETE_ON_ERROR:
+.SUFFIXES:
+SHELL := bash
+.SHELLFLAGS := -eu -o pipefail -c
+
+escape = $(subst ','\'',$(1))
+
+define noexpand
+ifeq ($$(origin $(1)),environment)
+ $(1) := $$(value $(1))
+endif
+ifeq ($$(origin $(1)),environment override)
+ $(1) := $$(value $(1))
+endif
+ifeq ($$(origin $(1)),command line)
+ override $(1) := $$(value $(1))
+endif
+endef