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14a3c6e4da
* m4/logf-ieee.m4: New file. * m4/logf.m4 (gl_FUNC_LOGF): If gl_FUNC_LOGF_IEEE is present, test whether logf works with a negative argument. Replace it if not. * lib/logf.c (logf): For negative arguments, return NaN. * modules/logf-ieee (Files): Add m4/logf-ieee.m4. (configure.ac): Invoke gl_FUNC_LOGF_IEEE. * doc/posix-functions/logf.texi: Mention the logf-ieee module.
32 lines
800 B
Plaintext
32 lines
800 B
Plaintext
@node logf
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@section @code{logf}
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@findex logf
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/logf.html}
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Gnulib module: logf or logf-ieee
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Portability problems fixed by either Gnulib module @code{logf} or @code{logf-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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Minix 3.1.8, AIX 5.1, Solaris 9.
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@item
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This function is only defined as a macro with arguments on some platforms:
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MSVC 9.
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@item
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This function returns a wrong value for a minus zero argument on some platforms:
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OSF/1 5.1.
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@end itemize
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Portability problems fixed by Gnulib module @code{logf-ieee}:
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@itemize
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@item
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This function returns a wrong value for a negative argument on some platforms:
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NetBSD 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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