diff -Naupr wmbiff-0.4.27.orig/aclocal.m4 wmbiff-0.4.27/aclocal.m4
--- wmbiff-0.4.27.orig/aclocal.m4	2009-08-18 23:10:43.853310870 +0200
+++ wmbiff-0.4.27/aclocal.m4	2009-08-18 23:16:23.562860666 +0200
@@ -854,22 +854,21 @@ AC_ARG_WITH(libgnutls-prefix,
           libgnutls_config_prefix="$withval", libgnutls_config_prefix="")
 
   if test x$libgnutls_config_prefix != x ; then
-     libgnutls_config_args="$libgnutls_config_args --prefix=$libgnutls_config_prefix"
      if test x${LIBGNUTLS_CONFIG+set} != xset ; then
-        LIBGNUTLS_CONFIG=$libgnutls_config_prefix/bin/libgnutls-config
+        LIBGNUTLS_CONFIG=$libgnutls_config_prefix/bin/pkg-config
      fi
   fi
 
-  AC_PATH_PROG(LIBGNUTLS_CONFIG, libgnutls-config, no)
+  AC_PATH_PROG(LIBGNUTLS_CONFIG, pkg-config, no)
   min_libgnutls_version=ifelse([$1], ,0.1.0,$1)
   AC_MSG_CHECKING(for libgnutls - version >= $min_libgnutls_version)
   no_libgnutls=""
   if test "$LIBGNUTLS_CONFIG" = "no" ; then
     no_libgnutls=yes
   else
-    LIBGNUTLS_CFLAGS=`$LIBGNUTLS_CONFIG $libgnutls_config_args --cflags`
-    LIBGNUTLS_LIBS=`$LIBGNUTLS_CONFIG $libgnutls_config_args --libs`
-    libgnutls_config_version=`$LIBGNUTLS_CONFIG $libgnutls_config_args --version`
+    LIBGNUTLS_CFLAGS=`$LIBGNUTLS_CONFIG --cflags gnutls`
+    LIBGNUTLS_LIBS=`$LIBGNUTLS_CONFIG --libs gnutls`
+    libgnutls_config_version=`$LIBGNUTLS_CONFIG --modversion gnutls`
 
 
       ac_save_CFLAGS="$CFLAGS"