diff -r aad38592bdde -r c0bda77b37a0 configure
--- a/configure	Tue Aug 14 19:40:01 2012 +0200
+++ b/configure	Wed Aug 22 16:46:17 2012 +0200
@@ -4582,6 +4582,65 @@
   RANLIB="$ac_cv_prog_RANLIB"
 fi
 
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_AWK="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+
+# Check bison version, we need a version great or equal than 2.4 to build matiec.
+[[ $(bison --version) =~ ([0-9][.][0-9]*) ]] && version_bison="${BASH_REMATCH[1]}"
+
+if awk -v ver="$version_bison" 'BEGIN { if (ver < 2.4) exit 1; }'; then :
+  have_bison_correct=yes
+else
+  have_bison_correct=no
+fi
+
+
+if test "x${have_bison_correct}" = xno; then
+  echo "------------------------------------------"
+  echo " Wrong bison version: $version_bison < 2.4 "
+  echo "------------------------------------------"
+  (exit 1); exit 1;
+fi
 
 # Checks for header files.
 ac_ext=c
@@ -5677,6 +5736,7 @@
 
 
 
+
 ac_config_files="$ac_config_files Makefile absyntax/Makefile absyntax_utils/Makefile stage1_2/Makefile stage3/Makefile stage4/Makefile stage4/generate_c/Makefile stage4/generate_iec/Makefile"
 
 cat >confcache <<\_ACEOF