From b8126de23e957978b4d0403097cd8402f0c1d82a Mon Sep 17 00:00:00 2001
From: delphij <delphij@FreeBSD.org>
Date: Wed, 12 Apr 2017 06:24:35 +0000
Subject: Fix multiple vulnerabilities of ntp. [SA-17:03]

Xen migration enhancements. [EN-17:05]

Approved by:	so
---
 contrib/ntp/sntp/m4/ntp_compiler.m4 | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'contrib/ntp/sntp/m4/ntp_compiler.m4')

diff --git a/contrib/ntp/sntp/m4/ntp_compiler.m4 b/contrib/ntp/sntp/m4/ntp_compiler.m4
index e4c515f..ae897e7 100644
--- a/contrib/ntp/sntp/m4/ntp_compiler.m4
+++ b/contrib/ntp/sntp/m4/ntp_compiler.m4
@@ -1,8 +1,16 @@
 dnl ######################################################################
 dnl Common m4sh code for compiler stuff
 AC_DEFUN([NTP_COMPILER], [
-AC_REQUIRE([AC_PROG_CC_C89])
-AC_REQUIRE([AC_PROG_CC_C99])
+
+AC_USE_SYSTEM_EXTENSIONS
+
+# Ralf Wildenhues: With per-target flags we need CC_C_O
+# AM_PROG_CC_C_O supersets AC_PROG_CC_C_O
+AM_PROG_CC_C_O
+AC_PROG_GCC_TRADITIONAL
+AC_REQUIRE([AC_PROG_CC_STDC])
+dnl AC_REQUIRE([AC_PROG_CC_C89])
+dnl AC_REQUIRE([AC_PROG_CC_C99])
 
 CFLAGS_NTP=
 CPPFLAGS_NTP=
@@ -192,5 +200,9 @@ esac
 
 NTP_OS_CFLAGS
 
+AC_C_BIGENDIAN
+AC_C_VOLATILE
+AC_PROG_CPP
+
 ])dnl
 dnl ======================================================================
-- 
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