Chris@41: dnl @synopsis AC_C99_FUNC_LRINT
Chris@41: dnl
Chris@41: dnl Check whether C99's lrint function is available.
Chris@41: dnl @version 1.3	Feb 12 2002
Chris@41: dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
Chris@41: dnl
Chris@41: dnl Permission to use, copy, modify, distribute, and sell this file for any 
Chris@41: dnl purpose is hereby granted without fee, provided that the above copyright 
Chris@41: dnl and this permission notice appear in all copies.  No representations are
Chris@41: dnl made about the suitability of this software for any purpose.  It is 
Chris@41: dnl provided "as is" without express or implied warranty.
Chris@41: dnl
Chris@41: AC_DEFUN([AC_C99_FUNC_LRINT],
Chris@41: [AC_CACHE_CHECK(for lrint,
Chris@41:   ac_cv_c99_lrint,
Chris@41: [
Chris@41: lrint_save_CFLAGS=$CFLAGS
Chris@41: CFLAGS="-lm"
Chris@41: AC_TRY_LINK([
Chris@41: #define		_ISOC9X_SOURCE	1
Chris@41: #define 	_ISOC99_SOURCE	1
Chris@41: #define		__USE_ISOC99	1
Chris@41: #define 	__USE_ISOC9X	1
Chris@41: 
Chris@41: #include <math.h>
Chris@41: ], if (!lrint(3.14159)) lrint(2.7183);, ac_cv_c99_lrint=yes, ac_cv_c99_lrint=no)
Chris@41: 
Chris@41: CFLAGS=$lrint_save_CFLAGS
Chris@41: 
Chris@41: ])
Chris@41: 
Chris@41: if test "$ac_cv_c99_lrint" = yes; then
Chris@41:   AC_DEFINE(HAVE_LRINT, 1,
Chris@41:             [Define if you have C99's lrint function.])
Chris@41: fi
Chris@41: ])# AC_C99_FUNC_LRINT
Chris@41: