From ca2b9b33890e430a76b57f83cdabe80c64b12829 Mon Sep 17 00:00:00 2001
From: Wouter Verhelst <w@uter.be>
Date: Mon, 7 Mar 2022 11:29:07 +0200
Subject: [PATCH] Drop deprecated macro from configure.ac

---
 configure.ac | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8f58fb65..1eb8e1ea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,7 +107,7 @@ AC_ARG_ENABLE(
   [ENABLE_GZNBD=no]
 )
 
-AC_PROG_CC_C99
+AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL
 AM_PROG_LEX(noyywrap)
@@ -267,7 +267,6 @@ AC_CHECK_FUNC([sync_file_range],
 	[AC_DEFINE([HAVE_SYNC_FILE_RANGE], [sync_file_range(2) is not supported], [sync_file_range(2) is supported])],
         [])
 AC_FUNC_FORK
-AC_FUNC_SETVBUF_REVERSED
 AC_MSG_CHECKING(whether client should be built)
 AS_CASE([$host_os],
   [linux*], [NBD_CLIENT_NAME="nbd-client"; AC_MSG_RESULT(yes)],