1dnl @synopsis AC_C99_FUNC_LRINT 2dnl 3dnl Check whether C99's lrint function is available. 4dnl @version 1.1 5dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com> 6dnl 7dnl Permission to use, copy, modify, distribute, and sell this file for any 8dnl purpose is hereby granted without fee, provided that the above copyright 9dnl and this permission notice appear in all copies. No representations are 10dnl made about the suitability of this software for any purpose. It is 11dnl provided "as is" without express or implied warranty. 12dnl 13AC_DEFUN([AC_C99_FUNC_LRINT], 14[AC_CACHE_CHECK(for lrint, 15 ac_cv_c99_lrint, 16[AC_TRY_LINK([ 17#define _ISOC9X_SOURCE 1 18#define _ISOC99_SOURCE 1 19#define __USE_ISOC99 1 20#define __USE_ISOC9X 1 21#include <math.h>], 22[ int value = lrint (0.432) ; ], ac_cv_c99_lrint=yes, ac_cv_c99_lrint=no)]) 23if test $ac_cv_c99_lrint = yes; then 24 AC_DEFINE(HAVE_LRINT, 1, 25 [Define if you have C99's lrint function.]) 26fi 27])# AC_C99_LRINT 28