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 :: Mailing Lists

[ILUG] gcc optimisation weirdness?

[ILUG] gcc optimisation weirdness?

Dave Airlie David.Airlie at ul.ie
Thu May 11 11:06:17 IST 2000


unspecified return type is int AFAIK, 

Dave.

On Thu, 11 May 2000, Shane Dempsey wrote:

> 
> Hiya Kenn, 
> Point taken. It is a valid and standard alternative
> to using the kind of masks that I normally use. 
> It might even be a lot tidier. I guess that I was 
> talking from a windows-founded ivory tower
> where we use glorious macros for these kind
> of things. 
> 
> I'd be very interested if anyone could test the following code
> for me using gcc. 
> // ===================================
> // AFAIK this shouldn't compile but VC++ thinks this 
> // is just peachy. 
> 
> struct PreludeToFailure(
>     PreludeToFailure( int stuff ) : _internalStuff( stuff ) { }
> 
>     int _internalStuff;
> }
> 
> main ()
> {
> 
>  // do some stuff here
> // ...
>  return 0;
> 
> }
> 
> // ===================================
> 
> This compiles under VC++ event with the strict ANSI compliance
> turned on ( -Za option for the MSVC compiler )
> despite ANSI C requiring   an int return type from main.
> The program crashes - no shit - but still compiles as
> the struct takes an int in the constructor. 
> 
> Just wondering if gcc is as badly behaved. I doubt it.
> 
>     ...shane
> 
> 
> 

-- 
------------ David Airlie, David.Airlie at ul.ie,airlied at skynet --------
Telecommunications Research Centre, ECE Dept, University of Limerick \
http://www.csn.ul.ie/~airlied	-- Telecommunications Researcher      \
--- TEL: +353-61-202695 -----------------------------------------------





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