cannam@126: dnl @synopsis AC_C99_FUNC_LRINTF
cannam@126: dnl
cannam@126: dnl Check whether C99's lrintf function is available.
cannam@126: dnl @version 1.3	Feb 12 2002
cannam@126: dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
cannam@126: dnl
cannam@126: dnl Permission to use, copy, modify, distribute, and sell this file for any 
cannam@126: dnl purpose is hereby granted without fee, provided that the above copyright 
cannam@126: dnl and this permission notice appear in all copies.  No representations are
cannam@126: dnl made about the suitability of this software for any purpose.  It is 
cannam@126: dnl provided "as is" without express or implied warranty.
cannam@126: dnl
cannam@126: AC_DEFUN([AC_C99_FUNC_LRINTF],
cannam@126: [AC_CACHE_CHECK(for lrintf,
cannam@126:   ac_cv_c99_lrintf,
cannam@126: [
cannam@126: lrintf_save_CFLAGS=$CFLAGS
cannam@126: CFLAGS="-lm"
cannam@126: AC_TRY_LINK([
cannam@126: #define		_ISOC9X_SOURCE	1
cannam@126: #define 	_ISOC99_SOURCE	1
cannam@126: #define		__USE_ISOC99	1
cannam@126: #define 	__USE_ISOC9X	1
cannam@126: 
cannam@126: #include <math.h>
cannam@126: ], if (!lrintf(3.14159)) lrintf(2.7183);, ac_cv_c99_lrintf=yes, ac_cv_c99_lrintf=no)
cannam@126: 
cannam@126: CFLAGS=$lrintf_save_CFLAGS
cannam@126: 
cannam@126: ])
cannam@126: 
cannam@126: if test "$ac_cv_c99_lrintf" = yes; then
cannam@126:   AC_DEFINE(HAVE_LRINTF, 1,
cannam@126:             [Define if you have C99's lrintf function.])
cannam@126: fi
cannam@126: ])# AC_C99_FUNC_LRINTF
cannam@126: