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- dnl @synopsis MN_C99_FUNC_LRINT
- dnl
- dnl Check whether C99's lrint function is available.
- dnl @version 1.3 Feb 12 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_LRINT],
- [AC_CACHE_CHECK(for lrint,
- ac_cv_c99_lrint,
- [
- lrint_save_CFLAGS=$CFLAGS
- CFLAGS="-lm"
- AC_TRY_LINK([
- #define _ISOC9X_SOURCE 1
- #define _ISOC99_SOURCE 1
- #define __USE_ISOC99 1
- #define __USE_ISOC9X 1
- #include <math.h>
- ], if (!lrint(3.14159)) lrint(2.7183);, ac_cv_c99_lrint=yes, ac_cv_c99_lrint=no)
- CFLAGS=$lrint_save_CFLAGS
- ])
- if test "$ac_cv_c99_lrint" = yes; then
- AC_DEFINE(HAVE_LRINT, 1,
- [Define if you have C99's lrint function.])
- fi
- ])# MN_C99_FUNC_LRINT
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