Complicated dg test cases

[Dan Kegel]

Segher Boessenkool wrote:
>> While preparing to try this, I noticed that the existing compat
>> patches seem to have an undefined exit status.  This is bad, isn't it?
>> Unless I'm confused, we should add a 'return 0;' to the end of 
>> g++.dg/compat/*/*_main.C ...
> 
> C99, 5.1.2.2.3/1:
> 
>     "...  reaching the } that terminates the main function returns a 
> value of 0."
> 
> so it's not necessary to explicitly return 0 (at least, in C99).

Nor in C++, I gather.

Thanks for the language lesson.  Nothing to see here, move along...
- Dan


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