| dnl @synopsis MN_C99_FUNC_LLRINT |
| dnl |
| dnl Check whether C99's llrint function is available. |
| dnl @version 1.1 Sep 30 2002 |
| 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([MN_C99_FUNC_LLRINT], |
| [AC_CACHE_CHECK(for llrint, |
| ac_cv_c99_llrint, |
| [ |
| llrint_save_CFLAGS=$CFLAGS |
| CFLAGS="-lm" |
| AC_TRY_LINK([ |
| #define _ISOC9X_SOURCE 1 |
| #define _ISOC99_SOURCE 1 |
| #define __USE_ISOC99 1 |
| #define __USE_ISOC9X 1 |
| |
| #include <math.h> |
| #include <stdint.h> |
| ], int64_t x ; x = llrint(3.14159) ;, ac_cv_c99_llrint=yes, ac_cv_c99_llrint=no) |
| |
| CFLAGS=$llrint_save_CFLAGS |
| |
| ]) |
| |
| if test "$ac_cv_c99_llrint" = yes; then |
| AC_DEFINE(HAVE_LLRINT, 1, |
| [Define if you have C99's llrint function.]) |
| fi |
| ])# MN_C99_FUNC_LLRINT |
| |