--- a/configure.ac	2014-08-22 12:22:54.290884351 +0200
+++ b/configure.ac	2014-08-22 12:23:15.822306295 +0200
@@ -42,18 +42,6 @@
      ;;		 		     
 esac
 
-
-# Bring additional directories where things might be found into our
-# search path. I don't know why autoconf doesn't do this by default
-if test x"${mingw}" == "xno" ; then
-  for spfx in /usr/local /opt/local /sw ; do
-    echo checking ${spfx}/include
-    if test -d ${spfx}/include; then
-        CPPFLAGS="-I${spfx}/include $CPPFLAGS"
-        LDFLAGS="-L${spfx}/lib $LDFLAGS"
-    fi
-  done
-fi
 #
 #
 ################################################################
@@ -71,7 +59,7 @@
 
 if test $mingw = "no" ; then
   # add the warnings we don't want to do on mingw
-  $WARNINGS_TO_TEST="$WARNINGS_TO_TEST -Wall -Wstrict-prototypes  -Weffc++"
+  WARNINGS_TO_TEST="$WARNINGS_TO_TEST -Wall -Wstrict-prototypes  -Weffc++"
 fi
 
 for option in $WARNINGS_TO_TEST
@@ -105,7 +93,7 @@
 
 if test $mingw = "no" ; then
   # add the warnings we don't want to do on mingw
-  $WARNINGS_TO_TEST="$WARNINGS_TO_TEST  -Weffc++"
+  WARNINGS_TO_TEST="$WARNINGS_TO_TEST  -Weffc++"
 fi
 
 for option in $WARNINGS_TO_TEST