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31bd9abc72
* m4/fmod-ieee.m4: New file. * m4/fmod.m4 (gl_FUNC_FMOD): If gl_FUNC_FMOD_IEEE is present, test whether fmod works with zero arguments. Replace it if not. * lib/math.in.h (fmod): New declaration. * lib/fmod.c: New file. * m4/math_h.m4 (gl_MATH_H): Test whether fmod is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_FMOD, REPLACE_FMOD. * modules/math (Makefile.am): Substitute GNULIB_FMOD, REPLACE_FMOD. * modules/fmod (Files): Add lib/fmod.c. (Depends-on): Add math, isinf, trunc, fma. (configure.ac): Arrange to compile lib/fmod.c if needed. * modules/fmod-ieee (Files): Add m4/fmod-ieee.m4, m4/minus-zero.m4, m4/signbit.m4. (configure.ac): Invoke gl_FUNC_FMOD_IEEE. * tests/test-math-c++.cc: Check the declaration of fmod. * doc/posix-functions/fmod.texi: Mention the fmod-ieee module.
27 lines
634 B
Plaintext
27 lines
634 B
Plaintext
@node fmod
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@section @code{fmod}
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@findex fmod
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fmod.html}
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Gnulib module: fmod or fmod-ieee
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Portability problems fixed by either Gnulib module @code{fmod} or @code{fmod-ieee}:
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@itemize
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@end itemize
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Portability problems fixed by Gnulib module @code{fmod-ieee}:
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@itemize
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@item
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This function has problems when the second argument is zero on some platforms:
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OSF/1 5.1.
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@item
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This function has problems when the first argument is minus zero on some
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platforms:
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mingw, MSVC 9.
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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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