From 185a7cd2767e3ed805aae1cca3ca440b161c4fc6 Mon Sep 17 00:00:00 2001
From: Wouter Wijngaards <wouter@nlnetlabs.nl>
Date: Thu, 26 Jul 2007 13:05:47 +0000
Subject: [PATCH] unput test.

git-svn-id: file:///svn/unbound/trunk@458 be551aaa-1e26-0410-a405-d3ace91eadb9
---
 Makefile.in  |  2 +-
 configure.ac | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/Makefile.in b/Makefile.in
index a6c11ca81..ada1c6c31 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -118,7 +118,7 @@ util/configlexer.c:  $(srcdir)/util/configlexer.lex util/configparser.h
 	$(INFO) Lex $<
 	@if test ! -d util; then $(INSTALL) -d util; fi
 	$Qecho "#include \"util/configyyrename.h\"" > $@
-	$Q$(LEX) -i -t $< >> $@
+	$Q$(LEX) -t $< >> $@
 
 util/configparser.c util/configparser.h:  $(srcdir)/util/configparser.y
 	$(INFO) Yacc $<
diff --git a/configure.ac b/configure.ac
index 523cf2de9..61680f309 100644
--- a/configure.ac
+++ b/configure.ac
@@ -336,6 +336,26 @@ cv_msgiovlen_type="int" ],
 AC_MSG_RESULT($cv_msgiovlen_type)
 AC_DEFINE_UNQUOTED([TYPE_MSGIOVLEN], $cv_msgiovlen_type, [Define to 'int' or type of struct msghdr.msg_iovlen.])
 
+# Check for yyunput
+AC_DEFUN([CHECK_YYUNPUT],
+[AC_MSG_CHECKING(whether lex can not generate yyunput)
+AC_CACHE_VAL(ac_cv_c_yy_unput,
+[ac_cv_c_yy_unput=no
+if $LEX --nounput -h 2>&1 | grep "do not generate" 2>&1 >/dev/null; then
+   ac_cv_c_yy_unput="yes"
+else
+   ac_cv_c_yy_unput="no"
+fi
+])
+
+AC_MSG_RESULT($ac_cv_c_yy_unput)
+if test $ac_cv_c_yy_unput = yes; then
+	LEX="$LEX --nounput"
+fi
+])dnl
+
+CHECK_YYUNPUT
+
 # Checks for libraries.
 AC_ARG_WITH(ssl, AC_HELP_STRING([--with-ssl=pathname],
                                     [enable SSL (will check /usr/local/ssl
-- 
2.47.2