From 252b6ef32992d4067cd703d97ac7233c12882235 Mon Sep 17 00:00:00 2001
From: Manuel Messner
Date: Thu, 8 Feb 2018 11:49:15 +0100
Subject: Makefile: repair check_rootpw function

https://stackoverflow.com/questions/20389064/using-gnu-make-functions-to-check-if-variables-are-defined
---
 Makefile | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index 1a91b0b..82993a4 100644
--- a/Makefile
+++ b/Makefile
@@ -48,11 +48,7 @@ ifdef DEBUG
     PACKER_OPTS += -var='headless=false'
 endif
 
-define check_rootpw
-    ifndef ROOTPW
-        $(error No root password is set, set it as ROOTPW in your environment.)
-    endif
-endef
+check_rootpw = $(if $(strip $(ROOTPW)),,$(error No root password is set, set it as ROOTPW in your environment.))
 
 .PHONY: all help clean
 all: help
-- 
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