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

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  Date : 2019-09-22T23:23:20
  

  Update some URLs
  
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• doc/posix-functions/isnan.texi

• @node isnan
  @section @code{isnan}
  @findex isnan
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/isnan.html}
  
  Gnulib module: isnan
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This macro is missing on some platforms:
  MSVC 9.
  @item
  @code{isnan} was introduced with C99 and is thus commonly not present
  on pre-C99 systems.
  @item
  @code{isnan} is not a macro on some platforms:
  IRIX 6.5, Solaris 11.4.
  @item
  This macro does not work on some platforms:
  MSVC 14.
  @item
  On IRIX 6.5 with @code{cc}, @code{isnan} does not recognize some NaNs.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  This macro returns an unspecified result when given noncanonical values
  such as unnormalized numbers, pseudo-denormals, pseudo-NaNs,
  pseudo-Infinities, and pseudo-zeroes.
  @end itemize
  

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