From 5cef42066d6c6ec38e180a95cc98379f4bfea331 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 31 Mar 2021 20:43:30 +0300
Subject: aur: Makefile best practices

---
 Makefile | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3ba30d0..0269644 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,28 @@
-MAKEFLAGS += --warn-undefined-variables
+MAKEFLAGS += --no-builtin-rules --no-builtin-variables --warn-undefined-variables
+unexport MAKEFLAGS
 .DEFAULT_GOAL := all
 .DELETE_ON_ERROR:
 .SUFFIXES:
 SHELL := bash
-.SHELLFLAGS := -e -o pipefail -c
+.SHELLFLAGS := -eu -o pipefail -c
+
+.PHONY: DO
+DO:
 
 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
+
 PKG_NAME := linux-status
 
 this_dir := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
-- 
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