From a34de2e378e0cff7191a426117f44e8b81543445 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Tue, 17 Oct 2017 10:35:35 +0100
Subject: [PATCH] Save and restore LIBS when checking for b64_ntop, reported by
 Ralf Friedl.

---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index 83c104c3..b18b3810 100644
--- a/configure.ac
+++ b/configure.ac
@@ -285,6 +285,7 @@ if test "x$found_b64_ntop" = xno; then
 	AC_MSG_RESULT(no)
 
 	AC_MSG_CHECKING(for b64_ntop with -lresolv)
+	OLD_LIBS="$LIBS"
 	LIBS="$LIBS -lresolv"
 	AC_TRY_LINK(
 		[
@@ -297,6 +298,7 @@ if test "x$found_b64_ntop" = xno; then
 		found_b64_ntop=no
 	)
 	if test "x$found_b64_ntop" = xno; then
+		LIBS="$OLD_LIBS"
 		AC_MSG_RESULT(no)
 	fi
 fi