Chris@0: dnl @synopsis AC_C99_FUNC_LRINTF
Chris@0: dnl
Chris@0: dnl Check whether C99's lrintf function is available.
Chris@0: dnl @version 1.3	Feb 12 2002
Chris@0: dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
Chris@0: dnl
Chris@0: dnl Permission to use, copy, modify, distribute, and sell this file for any 
Chris@0: dnl purpose is hereby granted without fee, provided that the above copyright 
Chris@0: dnl and this permission notice appear in all copies.  No representations are
Chris@0: dnl made about the suitability of this software for any purpose.  It is 
Chris@0: dnl provided "as is" without express or implied warranty.
Chris@0: dnl
Chris@0: AC_DEFUN([AC_C99_FUNC_LRINTF],
Chris@0: [AC_CACHE_CHECK(for lrintf,
Chris@0:   ac_cv_c99_lrintf,
Chris@0: [
Chris@0: lrintf_save_CFLAGS=$CFLAGS
Chris@0: CFLAGS="-lm"
Chris@0: AC_TRY_LINK([
Chris@0: #define		_ISOC9X_SOURCE	1
Chris@0: #define 	_ISOC99_SOURCE	1
Chris@0: #define		__USE_ISOC99	1
Chris@0: #define 	__USE_ISOC9X	1
Chris@0: 
Chris@0: #include <math.h>
Chris@0: ], if (!lrintf(3.14159)) lrintf(2.7183);, ac_cv_c99_lrintf=yes, ac_cv_c99_lrintf=no)
Chris@0: 
Chris@0: CFLAGS=$lrintf_save_CFLAGS
Chris@0: 
Chris@0: ])
Chris@0: 
Chris@0: if test "$ac_cv_c99_lrintf" = yes; then
Chris@0:   AC_DEFINE(HAVE_LRINTF, 1,
Chris@0:             [Define if you have C99's lrintf function.])
Chris@0: fi
Chris@0: ])# AC_C99_FUNC_LRINTF
Chris@0: