From b64052eb959756ca810a5669228c063e3f9efc59 Mon Sep 17 00:00:00 2001
From: Francis Dupont <fdupont@isc.org>
Date: Fri, 15 Feb 2019 10:47:10 +0100
Subject: [PATCH] [453-update-makefile-using-bison] Reverted configure.ac
 spurious change

---
 configure.ac | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/configure.ac b/configure.ac
index d93ffed1b8..1b872cb8cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1032,6 +1032,40 @@ AC_SUBST(DISTCHECK_LOG4CPLUS_CONFIGURE_FLAG)
 AC_SUBST(LOG4CPLUS_LIBS)
 AC_SUBST(LOG4CPLUS_INCLUDES)
 
+CPPFLAGS_SAVED=$CPPFLAGS
+CPPFLAGS="$LOG4CPLUS_INCLUDES $CPPFLAGS"
+LIBS_SAVED="$LIBS"
+LIBS="$LOG4CPLUS_LIBS $MULTITHREADING_FLAG $LIBS"
+
+AC_CHECK_HEADERS([log4cplus/logger.h],,AC_MSG_ERROR([Missing required header files.]))
+AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM([#include <log4cplus/logger.h>
+                         ],
+                         [using namespace log4cplus;
+                          Logger logger = Logger::getInstance("main");
+                         ])],
+        [AC_MSG_RESULT([checking for log4cplus library... yes])],
+        [AC_MSG_RESULT([checking for log4cplus library... no])
+         AC_MSG_ERROR([Needs log4cplus library])]
+)
+
+dnl Determine the log4cplus version, used mainly for config.report.
+AC_MSG_CHECKING([log4cplus version])
+cat > conftest.cpp << EOF
+#include <log4cplus/version.h>
+AUTOCONF_LOG4CPLUS_VERSION=LOG4CPLUS_VERSION_STR
+EOF
+
+LOG4CPLUS_VERSION=`$CPPP $CPPFLAGS conftest.cpp | grep '^AUTOCONF_LOG4CPLUS_VERSION=' | $SED -e 's/^AUTOCONF_LOG4CPLUS_VERSION=//' -e 's/[[ 	]]//g' -e 's/"//g' 2> /dev/null`
+if test -z "$LOG4CPLUS_VERSION"; then
+  LOG4CPLUS_VERSION="unknown"
+fi
+$RM -f conftest.cpp
+AC_MSG_RESULT([$LOG4CPLUS_VERSION])
+
+CPPFLAGS=$CPPFLAGS_SAVED
+LIBS=$LIBS_SAVED
+
 #
 # Configure Boost header path
 #
-- 
2.47.2