diff --git a/m4/lrint.m4 b/m4/lrint.m4
deleted file mode 100644
index c60665cee9..0000000000
--- a/m4/lrint.m4
+++ /dev/null
@@ -1,27 +0,0 @@
-dnl @synopsis AC_C99_FUNC_LRINT
-dnl
-dnl Check whether C99's lrint function is available.
-dnl @version 1.1
-dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
-dnl
-dnl Permission to use, copy, modify, distribute, and sell this file for any 
-dnl purpose is hereby granted without fee, provided that the above copyright 
-dnl and this permission notice appear in all copies.  No representations are
-dnl made about the suitability of this software for any purpose.  It is 
-dnl provided "as is" without express or implied warranty.
-dnl
-AC_DEFUN([AC_C99_FUNC_LRINT],
-[AC_CACHE_CHECK(for lrint,
-  ac_cv_c99_lrint,
-[AC_TRY_COMPILE([
-#define		_ISOC9X_SOURCE	1
-#define 	_ISOC99_SOURCE	1
-#define		__USE_ISOC99	1
-#define 	__USE_ISOC9X	1
-#include	<math.h>],
-[	int value = lrint (0.432) ; ], ac_cv_c99_lrint=yes, ac_cv_c99_lrint=no)])
-if test $ac_cv_c99_lrint = yes; then
-  AC_DEFINE(HAVE_LRINT, 1,
-            [Define if you have C99's lrint function.])
-fi
-])# AC_C99_LRINT