From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 5 May 2024 14:16:49 +0000 (+0100)
Subject: Makefile: Support out-of-tree builds (badly).
X-Git-Tag: 1.0.0~2
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/distorted-dkim/commitdiff_plain/ebea04c024b65369f16f138c34ee405c3bcc811e

Makefile: Support out-of-tree builds (badly).
---

diff --git a/Makefile b/Makefile
index 077b638..fa66c9f 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@
 ###--------------------------------------------------------------------------
 ### User-serviceable parts.
 
+## Source directory.
+srcdir			:= $(dir $(lastword $(MAKEFILE_LIST)))
+
 ## Installation directories.
 prefix			 = /usr/local
 exec_prefix		 = ${prefix}
@@ -26,6 +29,8 @@ clean::
 force:
 .PHONY: force
 
+VPATH			 = $(srcdir)
+
 ## Layout.
 INSTDIRS		 =