| Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame^] | 1 | dnl @synopsis MN_C99_FUNC_LLRINT |
| 2 | dnl |
| 3 | dnl Check whether C99's llrint function is available. |
| 4 | dnl @version 1.1 Sep 30 2002 |
| 5 | dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com> |
| 6 | dnl |
| 7 | dnl Permission to use, copy, modify, distribute, and sell this file for any |
| 8 | dnl purpose is hereby granted without fee, provided that the above copyright |
| 9 | dnl and this permission notice appear in all copies. No representations are |
| 10 | dnl made about the suitability of this software for any purpose. It is |
| 11 | dnl provided "as is" without express or implied warranty. |
| 12 | dnl |
| 13 | AC_DEFUN([MN_C99_FUNC_LLRINT], |
| 14 | [AC_CACHE_CHECK(for llrint, |
| 15 | ac_cv_c99_llrint, |
| 16 | [ |
| 17 | llrint_save_CFLAGS=$CFLAGS |
| 18 | CFLAGS="-lm" |
| 19 | AC_TRY_LINK([ |
| 20 | #define _ISOC9X_SOURCE 1 |
| 21 | #define _ISOC99_SOURCE 1 |
| 22 | #define __USE_ISOC99 1 |
| 23 | #define __USE_ISOC9X 1 |
| 24 | |
| 25 | #include <math.h> |
| 26 | #include <stdint.h> |
| 27 | ], int64_t x ; x = llrint(3.14159) ;, ac_cv_c99_llrint=yes, ac_cv_c99_llrint=no) |
| 28 | |
| 29 | CFLAGS=$llrint_save_CFLAGS |
| 30 | |
| 31 | ]) |
| 32 | |
| 33 | if test "$ac_cv_c99_llrint" = yes; then |
| 34 | AC_DEFINE(HAVE_LLRINT, 1, |
| 35 | [Define if you have C99's llrint function.]) |
| 36 | fi |
| 37 | ])# MN_C99_FUNC_LLRINT |
| 38 | |