linux: fix a warning in the process_util unittest

linux: fix a warning in the process_util unittest

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=32648

[vandebo (ex-Chrome), 2009-11-20 19:48:52]

LGTM

I don't know what the chrome convention is for this case.  I'd normally fix this
with '(void) posix_memalign(...'

[Evan Martin, 2009-11-20 19:56:25]

I like your idea better.

[Hironori Bono, 2009-11-24 01:54:43]

On 2009/11/20 19:48:52, vandebo wrote:
> I don't know what the chrome convention is for this case.  I'd normally fix
this with '(void) posix_memalign(...'

A "warn_unused_result" attribute makes gcc to output a warning when the return
value is NOT USED. As you can imagine, casting the return value to void
explicitly declares we don't use the return value. So, it cannot stop this
warning. (Fortunately or unfortunately, gcc 4.4 is very clever and strict.)

Regards,

Hironori Bono