From 88a3b24bd568456f44204f68b105c1e1d7242854 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Fri, 30 Jun 2023 12:24:02 +0200
Subject: Makefile: move the prelude to prelude.mk

---
 Makefile   | 25 +------------------------
 prelude.mk | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 24 deletions(-)
 create mode 100644 prelude.mk

diff --git a/Makefile b/Makefile
index 549576e..aa27628 100644
--- a/Makefile
+++ b/Makefile
@@ -1,24 +1,4 @@
-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
+include prelude.mk
 
 TOOLSET ?= mingw
 CONFIGURATION ?= Debug
@@ -43,9 +23,6 @@ $(eval $(call noexpand,BOOST_VERSION))
 $(eval $(call noexpand,CMAKE_FLAGS))
 $(eval $(call noexpand,DESTDIR))
 
-.PHONY: DO
-DO:
-
 .PHONY: all
 all: build
 
diff --git a/prelude.mk b/prelude.mk
new file mode 100644
index 0000000..374111e
--- /dev/null
+++ b/prelude.mk
@@ -0,0 +1,23 @@
+# 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
-- 
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