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

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• Hash : 187808c6
  Author :
  Date : 2014-04-16T11:35:55
  

  expl: avoid incorrect expl(small_value) on OpenBSD 5.4
  
  OpenBSD 5.4, expl() incorrectly returns 'nan' for small values.
  Detect this and use gnulib's expl() in that case.
  
  Discussed here:
  http://marc.info/?t=139159081700002&r=1&w=2
  (Message from David Coppa on 2014-02-05 to openbsd-tech mailing list).
  
  Fixed here (in revision 1.2):
  http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libm/src/ld128/s_floorl.c
  
  * m4/expl.m4 (gl_FUNC_EXPL): Add a check for this condition.
  * doc/posix-functions/expl.texi: Mention the workaround.
  

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• doc/posix-functions/expl.texi

• @node expl
  @section @code{expl}
  @findex expl
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/expl.html}
  
  Gnulib module: expl
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function is missing on some platforms:
  FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin, Interix 3.5, BeOS.
  @item
  This function returns NaN for small operands:
  OpenBSD 5.4.
  @item
  This function is only defined as a macro with arguments on some platforms:
  MSVC 9.
  @item
  This function is not declared on some platforms:
  Mac OS X 10.3.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @end itemize
  

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