--- configure.ac.orig       2013-05-08 08:34:56.000000000 +0200
+++ configure.ac    2013-06-12 11:57:59.161401364 +0200
@@ -302,6 +302,8 @@ done
 if test "X$host_config" != "Xnone"; then
   CC_BASENAME="`echo $CC | cut -f1 -d' ' | xargs basename 2>/dev/null`"
   . $host_config
+else
+  AC_MSG_ERROR([no usable host config found])
 fi

 ## Source any special site-specific file
--- configure,orig	2013-05-08 08:35:37.000000000 +0200
+++ configure	2013-06-12 11:58:57.991149444 +0200
@@ -4126,6 +4126,8 @@ done
 if test "X$host_config" != "Xnone"; then
   CC_BASENAME="`echo $CC | cut -f1 -d' ' | xargs basename 2>/dev/null`"
   . $host_config
+else
+  as_fn_error $? "no usable host config found" "$LINENO" 5
 fi
 
 ## Source any special site-specific file