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

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• doc/posix-functions/math_errhandling.texi

• @node math_errhandling
  @subsection @code{math_errhandling}
  @findex math_errhandling
  
  ISO C23 specification:@* @url{https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3220.pdf} section 7.12.1
  
  Documentation:@* @uref{https://www.kernel.org/doc/man-pages/online/pages/man7/math_error.7.html,,man math_error}
  
  Gnulib module: ---
  
  Portability problems fixed by Gnulib:
  @itemize
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  This macro is missing on some platforms:
  NetBSD 10.0, mingw.
  @item
  This macro does not describe the error behaviour
  of elementary arithmetic operations (+, -, *, /)
  and of mathematical operations for which the compiler emits inline code
  (such as @code{sqrt} on some CPUs).
  @item
  This macro does not describe the error behaviour of functions
  such as @code{strtod}.
  @item
  For mathematical operations in general, it is a safer bet to look
  at the exceptions set in the floating-point environment
  (by calling @code{feclearexcept (FE_ALL_EXCEPT)} before the operation
  and @code{fetestexcept} after the operation),
  regardless of @code{math_errhandling}.
  @end itemize
  

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