kc3-lang/gnulib/doc/posix-functions/exp2l.texi

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• Hash : aa42b545
  Author :
  Date : 2012-03-09T02:14:26
  

  exp2l-ieee: Work around test failure on OpenBSD 4.9 and IRIX 6.5.
  
  * m4/exp2l-ieee.m4: New file.
  * m4/exp2l.m4 (gl_FUNC_EXP2L): If gl_FUNC_EXP2L_IEEE is present,
  test whether exp2l works with a NaN argument and with a negative
  infinity argument. Replace it if not.
  * lib/math.in.h (exp2l): Override if REPLACE_EXP2L is 1.
  * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_EXP2L.
  * modules/math (Makefile.am): Substitute REPLACE_EXP2L.
  * modules/exp2l (configure.ac): Consider REPLACE_EXP2L.
  (Depends-on): Update conditions.
  * modules/exp2l-ieee (Files): Add m4/exp2l-ieee.m4.
  (configure.ac): Invoke gl_FUNC_EXP2L_IEEE.
  * doc/posix-functions/exp2l.texi: Mention the exp2l-ieee module.
  

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• doc/posix-functions/exp2l.texi

• @node exp2l
  @section @code{exp2l}
  @findex exp2l
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/exp2l.html}
  
  Gnulib module: exp2l or exp2l-ieee
  
  Portability problems fixed by either Gnulib module @code{exp2l} or @code{exp2l-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, older IRIX 6.5, OSF/1 4.0, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS.
  @item
  This function is not declared on some platforms:
  IRIX 6.5.
  @end itemize
  
  Portability problems fixed by Gnulib module @code{exp2l-ieee}:
  @itemize
  @item
  This function returns a wrong value for a NaN argument on some platforms:
  OpenBSD 4.9.
  @item
  This function returns a wrong value for a negative infinity argument on some platforms:
  IRIX 6.5.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @end itemize
  

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