--- configure.ac~	2012-02-22 19:57:43.000000000 +0800
+++ configure.ac	2013-01-08 12:09:17.513131703 +0800
@@ -39,7 +39,6 @@
 AC_PROG_CC
 AC_PROG_CXX
 AC_C_INLINE
-AM_PROG_CC_STDC
 AC_HEADER_STDC
 AM_PROG_CC_C_O
 AC_CHECK_PROGS(MD5SUM,[md5sum md5])
--- aclocal.m4~	2012-02-22 22:09:06.000000000 +0800
+++ aclocal.m4	2013-01-08 12:09:44.943848402 +0800
@@ -278,17 +278,6 @@
 
 # This was merged into AC_PROG_CC in Autoconf.
 
-AU_DEFUN([AM_PROG_CC_STDC],
-[AC_PROG_CC
-AC_DIAGNOSE([obsolete], [$0:
-	your code should no longer depend upon `am_cv_prog_cc_stdc', but upon
-	`ac_cv_prog_cc_stdc'.  Remove this warning and the assignment when
-	you adjust the code.  You can also remove the above call to
-	AC_PROG_CC if you already called it elsewhere.])
-am_cv_prog_cc_stdc=$ac_cv_prog_cc_stdc
-])
-AU_DEFUN([fp_PROG_CC_STDC])
-
 # AM_CONDITIONAL                                            -*- Autoconf -*-
 
 # Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006, 2008