--- configure.orig	2011-05-13 09:26:24.000000000 +0200
+++ configure	2012-02-18 20:13:24.549495741 +0100
@@ -4811,37 +4811,6 @@
 $as_echo "no, using $LN_S" >&6; }
 fi
 
-
-#force use of flex/bison
-if test "x$LEX" != "xflex"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Program flex not found (found $LEX)" >&5
-$as_echo "$as_me: WARNING: Program flex not found (found $LEX)" >&2;}
-  as_fn_error $? "Please install gnu flex from http://www.gnu.org/software/flex/" "$LINENO" 5
-fi
-if test "x$YACC" != "xbison -y"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Program bison not found (found $YACC)" >&5
-$as_echo "$as_me: WARNING: Program bison not found (found $YACC)" >&2;}
-  as_fn_error $? "Please install gnu bison from http://www.gnu.org/software/bison/" "$LINENO" 5
-fi
-
-#advice use of gcc
-if test "x$GCC" = "xyes"; then
-  case "$CFLAGS" in
-  *-Wall*)
-    # already present
-    ;;
-  *)
-    CFLAGS="$CFLAGS -Wall"
-  esac
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Seems that the selected C-compiler is not gnu gcc C-compiler" >&5
-$as_echo "$as_me: WARNING: Seems that the selected C-compiler is not gnu gcc C-compiler" >&2;}
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: We advice you to use gcc as C-compiler" >&5
-$as_echo "$as_me: WARNING: We advice you to use gcc as C-compiler" >&2;}
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: You can install it from http://www.gnu.org/software/gcc/" >&5
-$as_echo "$as_me: WARNING: You can install it from http://www.gnu.org/software/gcc/" >&2;}
-fi
-
 # Libtool initialisation.
 # Make sure we can run config.sub.
 $SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||