kc3-lang/gnulib/doc/posix-functions/hypotl.texi

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• Hash : 937471db
  Author :
  Date : 2012-03-14T03:25:16
  

  hypotl: Bypass broken implementation in OpenBSD 5.1/SPARC.
  
  * 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.
  

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• doc/posix-functions/hypotl.texi

• @node hypotl
  @section @code{hypotl}
  @findex hypotl
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypotl.html}
  
  Gnulib module: hypotl or hypotl-ieee
  
  Portability problems fixed by either Gnulib module @code{hypotl} or @code{hypotl-ieee}:
  @itemize
  @item
  This function is missing on some platforms:
  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.
  @item
  This function produces very imprecise results on some platforms:
  OpenBSD 5.1/SPARC.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{hypotl-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
  

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