From 835528be01c5c2d68f4857d75b760d1077ff3233 Mon Sep 17 00:00:00 2001
From: Thomas Nagy <tnagy2pow10@gmail.com>
Date: Tue, 14 Jan 2014 20:01:05 +0100
Subject: [PATCH] docs for the regexp substitution in demos/subst/

---
 demos/subst/foo.in  | 2 +-
 demos/subst/wscript | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/demos/subst/foo.in b/demos/subst/foo.in
index ca332d31..67371c56 100644
--- a/demos/subst/foo.in
+++ b/demos/subst/foo.in
@@ -1,2 +1,2 @@
-prefix: @PREFIX@
+prefix: %PREFIX%
 bindir: @BINDIR@
diff --git a/demos/subst/wscript b/demos/subst/wscript
index 6e6a54d8..e0173027 100644
--- a/demos/subst/wscript
+++ b/demos/subst/wscript
@@ -4,7 +4,7 @@
 top = '.'
 out = 'bin'
 
-import os
+import os, re
 from waflib import Utils
 
 def configure(conf):
@@ -23,6 +23,7 @@ def build(bld):
 		install_path = '/tmp/uff/', # installation path, optional
 		chmod        = Utils.O755, # installation mode, optional
 		PREFIX       = bld.env.PREFIX, # variables to use in the substitution
+		re_m4        = re.compile('%%(\w+)%%', re.M), # custom substitution
 		BINDIR       = bld.env.BINDIR)
 
 	# if you are using an external dict, here is to merge the key/values: