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gnulib/doc/posix-functions/hypotf.texi
Bruno Haible b3f31eeaa2 hypotf-ieee: Work around test failure on OSF/1 and native Windows.
* m4/hypotf-ieee.m4: New file.
* m4/hypotf.m4 (gl_FUNC_HYPOTF): If gl_FUNC_HYPOTF_IEEE is present,
test whether hypotf works with mixed NaN and Infinity arguments.
Replace it if not.
* modules/hypotf-ieee (Files): Add m4/hypotf-ieee.m4.
(Depends-on): Add hypot-ieee.
(configure.ac): Invoke gl_FUNC_HYPOTF_IEEE.
* doc/posix-functions/hypotf.texi: Mention the hypotf-ieee module.
2012-02-29 20:51:43 +01:00

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@node hypotf
@section @code{hypotf}
@findex hypotf
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypotf.html}
Gnulib module: hypotf or hypotf-ieee
Portability problems fixed by either Gnulib module @code{hypotf} or @code{hypotf-ieee}:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, AIX 5.1, HP-UX 11, Solaris 9, MSVC 9.
@item
This function produces wrong values on some platforms:
NetBSD 5.1, OpenBSD 4.9.
@end itemize
Portability problems fixed by Gnulib module @code{hypot-ieee}:
@itemize
@item
When the arguments are mixed NaN and Infinity, this function returns a wrong
value on some platforms:
OSF/1 5.1, mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@end itemize