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9b144e908f
* modules/round-ieee: New file. * m4/round.m4 (gl_FUNC_ROUND): If gl_FUNC_ROUND_IEEE is also used, test whether round works according to ISO C 99 with IEC 60559. * m4/round-ieee.m4: New file. * modules/round-ieee-tests: New file. * tests/test-round-ieee.c: New file, based on tests/test-roundf-ieee.c. * tests/test-round1.c (main): Remove signbit tests. * modules/round-tests (Depends-on): Remove 'signbit'. * doc/posix-functions/round.texi: Mention the new module.
33 lines
855 B
Plaintext
33 lines
855 B
Plaintext
@node round
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@section @code{round}
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@findex round
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/round.html}
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Gnulib module: round or round-ieee
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Portability problems fixed by either Gnulib module @code{round} or @code{round-ieee}:
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@itemize
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@item
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This function is missing on some platforms:
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FreeBSD 5.2.1, OpenBSD 3.8, AIX 5.1, IRIX 6.5, OSF/1 4.0, Solaris 9, Interix 3.5.
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@item
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This function is not declared on some platforms:
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glibc 2.8, OSF/1 5.1.
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@item
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This functions returns a wrong result for x = 1/2 - 2^-54 on some platforms:
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NetBSD 3.0, AIX 7.1.
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@end itemize
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Portability problems fixed by Gnulib module @code{round-ieee}:
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@itemize
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@item
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This function returns a positive zero for a minus zero argument
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on some platforms:
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OSF/1 5.1.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@end itemize
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