Compiling GCC With a C++ Compiler (g++)

[Andreas Schwab]

"Dave Korn" <dk@artimi.com> writes:

>> -----Original Message-----
>> From: gcc-owner On Behalf Of Gabriel Dos Reis
>> Sent: 13 October 2004 04:47
>
>> Phil Edwards writes:
>> 
>> [...]
>> 
>> | particular place.  Since member init-lists aren't available 
>> for STRING_CST,
>> | we have to cast away the const in build_string
>> 
>> which is undefined behaviour by C rules  (and C++ too).
>
>   I'll bet alias analysis just loves it too.  Wouldn't using tricks like
> this lead to a situation in the future (if and) when there's full IPA in gcc
> and it can't bootstrap itself reliably any more?

In C you are always allowed to cast away const and write through the
resulting lvalue as long as the underlying object is not read-only.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
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