From 945721f48f74d5cfffef7c7cf3a3d6bc2521f5dd Mon Sep 17 00:00:00 2001
From: ivan <ivan>
Date: Tue, 15 Jul 2003 13:16:32 +0000
Subject: import of rt 3.0.4

---
 rt/m4/rt_expand_var.m4 | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 rt/m4/rt_expand_var.m4

(limited to 'rt/m4/rt_expand_var.m4')

diff --git a/rt/m4/rt_expand_var.m4 b/rt/m4/rt_expand_var.m4
new file mode 100644
index 000000000..cec884abc
--- /dev/null
+++ b/rt/m4/rt_expand_var.m4
@@ -0,0 +1,18 @@
+dnl
+dnl @synopsis	RT_EXPAND_VAR(baz, $fraz)
+dnl
+dnl Iteratively expands the second parameter, until successive iterations
+dnl yield no change. The result is then assigned to the first parameter.
+dnl
+dnl This code is heavily borrowed from the Apache 2 codebase.
+dnl
+
+AC_DEFUN([RT_EXPAND_VAR],[
+	ap_last=''
+	ap_cur='$2'
+	while test "x${ap_cur}" != "x${ap_last}"; do
+		ap_last="${ap_cur}"
+		ap_cur=`eval "echo ${ap_cur}"`
+	done
+	$1="${ap_cur}"
+])
-- 
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