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annotate src/libsndfile-1.0.25/M4/lrintf.m4 @ 169:223a55898ab9 tip default

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Add null config files
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 02 Mar 2020 14:03:47 +0000
parents 545efbb81310
children
rev   line source
cannam@85 1 dnl @synopsis MN_C99_FUNC_LRINTF
cannam@85 2 dnl
cannam@85 3 dnl Check whether C99's lrintf function is available.
cannam@85 4 dnl @version 1.3 Feb 12 2002
cannam@85 5 dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
cannam@85 6 dnl
cannam@85 7 dnl Permission to use, copy, modify, distribute, and sell this file for any
cannam@85 8 dnl purpose is hereby granted without fee, provided that the above copyright
cannam@85 9 dnl and this permission notice appear in all copies. No representations are
cannam@85 10 dnl made about the suitability of this software for any purpose. It is
cannam@85 11 dnl provided "as is" without express or implied warranty.
cannam@85 12 dnl
cannam@85 13 AC_DEFUN([MN_C99_FUNC_LRINTF],
cannam@85 14 [AC_CACHE_CHECK(for lrintf,
cannam@85 15 ac_cv_c99_lrintf,
cannam@85 16 [
cannam@85 17 lrintf_save_CFLAGS=$CFLAGS
cannam@85 18 CFLAGS="-lm"
cannam@85 19 AC_TRY_LINK([
cannam@85 20 #define _ISOC9X_SOURCE 1
cannam@85 21 #define _ISOC99_SOURCE 1
cannam@85 22 #define __USE_ISOC99 1
cannam@85 23 #define __USE_ISOC9X 1
cannam@85 24
cannam@85 25 #include <math.h>
cannam@85 26 ], if (!lrintf(3.14159)) lrintf(2.7183);, ac_cv_c99_lrintf=yes, ac_cv_c99_lrintf=no)
cannam@85 27
cannam@85 28 CFLAGS=$lrintf_save_CFLAGS
cannam@85 29
cannam@85 30 ])
cannam@85 31
cannam@85 32 if test "$ac_cv_c99_lrintf" = yes; then
cannam@85 33 AC_DEFINE(HAVE_LRINTF, 1,
cannam@85 34 [Define if you have C99's lrintf function.])
cannam@85 35 fi
cannam@85 36 ])# MN_C99_FUNC_LRINTF
cannam@85 37