mirror of
git://git.code.sf.net/p/cdesktopenv/code
synced 2025-03-09 15:50:02 +00:00
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1985-2011 AT&T Intellectual Property *
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* Copyright (c) 2020-2021 Contributors to ksh 93u+m *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* Glenn Fowler <gsf@research.att.com> *
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* David Korn <dgk@research.att.com> *
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* Phong Vo <kpv@research.att.com> *
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* *
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***********************************************************************/
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/*
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* used to test if -last requires -lm
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*
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* arch -last -lm
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* ---- ----- ---
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* linux.sparc sfdlen,sfputd frexp,ldexp
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*/
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#if N >= 8
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#define _ISOC99_SOURCE 1
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#endif
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#include <math.h>
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int
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main()
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{
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#if N & 1
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long double value = 0;
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#else
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double value = 0;
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#endif
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#if N < 5
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int exp = 0;
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#endif
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#if N == 1
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return ldexpl(value, exp) != 0;
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#endif
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#if N == 2
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return ldexp(value, exp) != 0;
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#endif
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#if N == 3
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return frexpl(value, &exp) != 0;
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#endif
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#if N == 4
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return frexp(value, &exp) != 0;
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#endif
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#if N == 5
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return isnan(value);
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#endif
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#if N == 6
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return isnan(value);
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#endif
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#if N == 7
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return copysign(1.0, value) < 0;
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#endif
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#if N == 8
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return signbit(value);
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#endif
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}
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