From 3c6b2d5071fb71035d5d8cfd24b3bb843840eb9b Mon Sep 17 00:00:00 2001
From: David Bremner <bremner@debian.org>
Date: Wed, 28 Nov 2012 08:25:52 -0400
Subject: [PATCH] configure: really expand libdir_expanded

It turns out that if people really use configure in autotools style and pass
libdir containing '${prefix}/foo' then the ldconfig previously failed.

This uses sed for portability (versus bash parameter expansion with
substitution) and hopefully a bit more robustness than blindly
parameter expanding the string.
---
 configure | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index ea8a1ad5..460fcfcf 100755
--- a/configure
+++ b/configure
@@ -236,7 +236,12 @@ done
 # Makefile.config file later like most values), because we need to
 # actually investigate this value compared to the ldconfig_paths value
 # below.
-libdir_expanded=${LIBDIR:-${PREFIX}/lib}
+if [ -z "$LIBDIR" ] ; then
+    libdir_expanded="${PREFIX}/lib"
+else
+    # very non-general variable expansion
+    libdir_expanded=`echo "$LIBDIR" | sed "s|\\${prefix}|${PREFIX}|g; s|\\$prefix/|${PREFIX}/|; s|//*|/|g"`
+fi
 
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