From a6817677a42d1294f1a3ce7b9f46b10ec557ddfa Mon Sep 17 00:00:00 2001
From: Romain Naour <romain.naour@smile.fr>
Date: Sun, 1 Apr 2018 15:23:59 +0200
Subject: [PATCH] configure.in: Allow to override the INADDR_NONE check

Prevent configure script from trying to run programs in a cross
compilation environment to check if INADDR_NONE is defined.

In the context of Buildroot, INADDR_NONE is always defined.
The snort package will set have_inaddr_none=yes in
SNORT_CONF_ENV.

Signed-off-by: Romain Naour <romain.naour@smile.fr>
Cc: Sergio Prado <sergio.prado@e-labworks.com>
---
 configure.in | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index 1e940b1..938409f 100644
--- a/configure.in
+++ b/configure.in
@@ -284,8 +284,8 @@ AC_CHECK_TYPES([int8_t,int16_t,int32_t,int64_t])
 AC_CHECK_TYPES([boolean])
 
 # In case INADDR_NONE is not defined (like on Solaris)
+AC_CACHE_CHECK([for INADDR_NONE], [have_inaddr_none], [
 have_inaddr_none="no"
-AC_MSG_CHECKING([for INADDR_NONE])
 AC_RUN_IFELSE(
 [AC_LANG_PROGRAM(
 [[
@@ -298,7 +298,7 @@ AC_RUN_IFELSE(
     return 0;
 ]])],
 [have_inaddr_none="yes"],
-[have_inaddr_none="no"])
+[have_inaddr_none="no"])])
 AC_MSG_RESULT($have_inaddr_none)
 if test "x$have_inaddr_none" = "xno"; then
 	AC_DEFINE([INADDR_NONE],[-1],[For INADDR_NONE definition])
-- 
2.14.3