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Subject: Re: [boost] Official warnings policy?
From: Jeffrey Bosboom (jbosboom_at_[hidden])
Date: 2009-11-11 04:54:41

Juergen Hunold wrote:
> With modern gcc (read: 4.3 and higher), you can use the following:
> -----------snip---------
> #if defined(__GNUC__)
> #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
> #endif
> void foo(int bar
> {
> }
> +#if defined(__GNUC__)
> + #pragma GCC diagnostic warning "-Wdeprecated-declarations"
> +#endif
> --------------------------------------------------------

The GCC docs say: "Also, while it is syntactically valid to put these
pragmas anywhere in your sources, the only supported location for them
is before any data or functions are defined. Doing otherwise may result
in unpredictable results depending on how the optimizer manages your

This might only mean you can't use them inside functions or class
definitions, but it seems to imply that using them after a function
definition leads to undefined behavior. Thus, even if we knew what
setting to turn the warning back to (perhaps the warning wasn't enabled
in the first place!), we might not be able to turn them back on.

--Jeffrey Bosboom

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