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44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
--- configure.in.orig Fri Feb 6 17:04:39 2004
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+++ configure.in Wed Jan 19 01:44:24 2005
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@@ -49,6 +49,43 @@
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fi
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])
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+dnl @synopsis AC_C99_FUNC_LRINTF
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+dnl
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+dnl Check whether C99's lrintf function is available.
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+dnl @version 1.3 Feb 12 2002
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+dnl @author Erik de Castro Lopo <erikd AT mega-nerd DOT com>
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+dnl
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+dnl Permission to use, copy, modify, distribute, and sell this file for any
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+dnl purpose is hereby granted without fee, provided that the above copyright
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+dnl and this permission notice appear in all copies. No representations are
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+dnl made about the suitability of this software for any purpose. It is
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+dnl provided "as is" without express or implied warranty.
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+dnl
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+AC_DEFUN([AC_C99_FUNC_LRINTF],
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+[AC_CACHE_CHECK(for lrintf,
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+ ac_cv_c99_lrintf,
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+[
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+lrintf_save_CFLAGS=$CFLAGS
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+CFLAGS="-O -lm"
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+AC_TRY_LINK([
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+#define _ISOC9X_SOURCE 1
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+#define _ISOC99_SOURCE 1
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+#define __USE_ISOC99 1
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+#define __USE_ISOC9X 1
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+
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+#include <math.h>
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+], if (!lrintf(3.14159)) lrintf(2.7183);, ac_cv_c99_lrintf=yes, ac_cv_c99_lrintf=no)
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+
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+CFLAGS=$lrintf_save_CFLAGS
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+
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+])
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+
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+if test "$ac_cv_c99_lrintf" = yes; then
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+ AC_DEFINE(HAVE_LRINTF, 1,
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+ [Define if you have C99's lrintf function.])
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+fi
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+])# AC_C99_FUNC_LRINTF
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+AC_C99_FUNC_LRINTF
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