Re: [Qemu-devel] [PATCH] New qemu-img convert -B option to preserve the COW aspect of images and/or re-base them

[Anthony Liguori <anthony@codemonkey.ws>]

Jamie Lokier wrote:
> Anthony Liguori wrote:
>   
>> It's sloppy.  In general, using a non-portable feature for no good 
>> reason other than you can is bad practice (even if we do depend on GCC).
>>     
>
> It's 2008, the standard is called C99 for a reason.
>   

Regardless, it's sloppy IMHO.  It's a lot easier to determine the type 
of something by looking at the top of the block.  And this is the 
convention for a very lot of projects Open Source projects, even the 
ones that heavily rely on GCC-isms like the Linux kernel.

Regards,

Anthony Liguori



> In 1998, we would have used C89 constructs like function prototypes,
> wouldn't we?
>
> :-)
>
> If you don't want to use non-portable features, may I suggest
> "gcc -std=c89".
>
> (Half joking, I use -Wdeclaration-after-statement myself to catch
> this, since it became a standard GCC feature with no option to turn it
> off and keep other GNU extensions.  But then, I write code which is
> more portable than QEMU and target older architectures.)
>
> -- Jamie
>
>
>