--- php-5.4.18/acinclude.m4.orig	2013-08-19 12:29:32.000000000 +0200
+++ php-5.4.18/acinclude.m4	2013-08-19 12:32:44.403972349 +0200
@@ -68,8 +68,8 @@
     changequote({,})
     ep_dir=`echo $1|$SED 's%/*[^/][^/]*/*$%%'`
     changequote([,])
-    ep_realdir=`(cd "$ep_dir" && pwd)`
-    $2="$ep_realdir"/`basename "$1"`
+    ep_realdir="$(cd "$ep_dir" && pwd)"
+    $2="$ep_realdir/$(basename "$1")"
   fi
 ])