From 3b4f1aeeccb985fcb97e1fcd1df6c050e169dfb3 Mon Sep 17 00:00:00 2001
From: Michal Suchanek <hramrach@gmail.com>
Date: Fri, 7 Sep 2012 12:55:48 +0200
Subject: [PATCH] Fix configure to work with multiarch distributions.

---
 configure.ac | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index ead559c30c..2ae34ef8d2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,7 +76,30 @@ case $prefix:$localstatedir in
 esac
 AC_SUBST([localstatedir])
 
-libdirname=`basename "$libdir"`
+# sed_quote separator string
+# Prefixes occurences of sed special characters and separator with \ in string.
+# Suggested separators: , / (space) .
+# Note that the character is prefixed with \ so characters that get special meaning
+# will not work as separator. eg: n \ ? ( { ) }
+sed_quote()
+{
+        echo -n "$2" | sed -e 's/\n/\\n/' -e 's|\([][*.$|'"$1"']\)|\\\1|g'
+}
+
+# remove_dir_prefix prefix path
+# Remove leading path prefix.
+# Return directory name without leading slash (basename drop-in).
+# Handle prefix trailing slash.
+# // (double slash) is not handled.
+remove_dir_prefix(){
+    local prefix="$(sed_quote "," "$1")"
+    echo "$1" | grep -q '/$' || prefix="${prefix}/"
+    local re="^$(sed_quote "," "$prefix")"
+    echo "$2" | grep -q "$re" || re=/
+    echo "$2" | sed -e "s,${re},,"
+}
+
+libdirname=`remove_dir_prefix '${exec_prefix}' "$libdir"`
 AC_SUBST([libdirname])
 
 # The original default values of {bin,sbin,lib}dir
-- 
2.47.3