Re: [AD] warn_unused_result GCC attribute?

[AJ <aj@xxxxxxxxxx>]

Chris wrote:
> I ran across this while compiling my new 2.6 kernel. Apparently GCC has 
> a warn_unused_result attribute that produces a warning when the return 
> value of a function isn't used (checked or put into a variable).
>
> I don't know what version of GCC introduced it, but I think it'd be 
> useful for things like install_allegro, set_gfx_mode, etc.. which you 
> should always check. Normally I wouldn't really like the extra warnings, 
> but considering the number of newbs that neglect return values, and even 
> experienced programmers that can let them slip by in error, it might be 
> better to add it.


that is an option for the users compiled program no?

how can you add a warn_unused to a library ?




> I would also like to suggest going through the GCC manual and finding 
> useful function, variable, and type attributes and adding them where 
> appropriate, for optimization purposes. Though perhaps this could wait 
> and just add them as the new API is written up.


aren't many of them GCC specific ?



aj.