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* m4/hypotl.m4 (gl_FUNC_HYPOTL_WORKS): New macro. (gl_FUNC_HYPOTL): Invoke it. If the function does not work, set REPLACE_HYPOTL to 1. * doc/posix-functions/hypotl.texi: Mention the OpenBSD 5.1/SPARC bug.
30 lines
851 B
Plaintext
30 lines
851 B
Plaintext
@node hypotl
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@section @code{hypotl}
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@findex hypotl
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypotl.html}
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Gnulib module: hypotl or hypotl-ieee
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Portability problems fixed by either Gnulib module @code{hypotl} or @code{hypotl-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 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS.
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@item
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This function produces very imprecise results on some platforms:
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OpenBSD 5.1/SPARC.
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@end itemize
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Portability problems fixed by Gnulib module @code{hypotl-ieee}:
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@itemize
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@item
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When the arguments are mixed NaN and Infinity, this function returns a wrong
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value on some platforms:
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OSF/1 5.1, 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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