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* m4/log1p-ieee.m4: New file. * m4/log1p.m4 (gl_FUNC_LOG1P): If gl_FUNC_LOG1P_IEEE is present, test whether log1p works with a minus zero argument. Replace it if not. * lib/math.in.h (log1p): Override if REPLACE_LOG1P is 1. * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_LOG1P. * modules/math (Makefile.am): Substitute REPLACE_LOG1P. * modules/log1p (configure.ac): Consider REPLACE_LOG1P. (Depends-on): Update conditions. * modules/log1p-ieee (Files): Add m4/log1p-ieee.m4, m4/minus-zero.m4, m4/signbit.m4. (configure.ac): Invoke gl_FUNC_LOG1P_IEEE. * doc/posix-functions/log1p.texi: Mention the log1p-ieee module.
26 lines
616 B
Plaintext
26 lines
616 B
Plaintext
@node log1p
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@section @code{log1p}
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@findex log1p
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/log1p.html}
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Gnulib module: log1p or log1p-ieee
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Portability problems fixed by either Gnulib module @code{log1p} or @code{log1p-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, MSVC 9.
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@end itemize
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Portability problems fixed by Gnulib module @code{log1p-ieee}:
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@itemize
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@item
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This function has problems when the argument is minus zero on some platforms:
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AIX 7.1, HP-UX 11.
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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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