Re: Does traditional C allow initializing a union?

[Andreas Schwab <schwab at issan dot informatik dot uni-dortmund dot de>]

"Kaveh R. Ghazi" <ghazi@caip.rutgers.edu> writes:

|> (Okay this is a C question not an egcs one, but it relates to egcs code.)
|> 
|> 	Does traditional C allow initializing a union?  Eg:
|> 
|>  > typedef union rtunion_def
|>  > {
|>  >   long rtwint;
|>  >   int rtint;
|>  >   char *rtstr;
|>  > } rtunion;
|>  > 
|>  > static rtunion foo = {0};
|> 
|> 	This works under all ansi compilers I've found, but it fails for
|> me on SunOS4 cc and Irix4 'cc -cckr'.  Is there another way to
|> initialize a union?

In this case just leaving out the initializer is exactly equivalent to the
above code, since variables with static storage duration that are not
initialized explicitly are guaranteed to be initialized to an appropriate
kind of zero.  I think this is also true for K&R C, surely for SunOS.

-- 
Andreas Schwab                                      "And now for something
schwab@issan.cs.uni-dortmund.de                      completely different"
schwab@gnu.org