Re: [Libmesh-users] segmentation fault error for testing examples on a Mac

[Antonio C. <ant...@gm...>]

you can specity to gcc that warnings coming from outside library
should be ignored wrapping the include in a pragma

// Tell the compiler to ignore specific kind of warnings:
#pragma GCC diagnostic ignored "-Wunused-variable"
#pragma GCC diagnostic ignored "-Wunused-parameter"

#include <mpicxx.h>

// Restore compiler warnings:
#pragma GCC diagnostic warning "-Wunused-variable"
#pragma GCC diagnostic warning "-Wunused-parameter"

instead of editing the external library.

Antonio

On Wed, Jun 1, 2011 at 3:59 PM, Roy Stogner <roy...@ic...> wrote:
>
> On Tue, 31 May 2011, Kyunghoon Lee wrote:
>
>> /opt/local/include/mpicxx.h:386: warning: unused parameter ‘oldtype’
>> /opt/local/include/mpicxx.h:386: warning: unused parameter ‘keyval’
>> /opt/local/include/mpicxx.h:386: warning: unused parameter ‘ex’
>> /opt/local/include/mpicxx.h:386: warning: unused parameter ‘attr_in’
>> /opt/local/include/mpicxx.h:386: warning: unused parameter ‘attr_out’
>
> And these warnings pop up for effectively every libMesh object build,
> too - aren't they annoying?
>
> The default MPI stack in Ubuntu has the same issues in its headers.
> These warnings don't indicate any problem more serious than "those
> developers didn't worry about checking and disabling gcc warnings",
> but I ended up editing the file (commenting out the legitimately
> unused parameter names in the declaration headers) so that any libMesh
> and/or application warnings wouldn't be buried in noise.
> ---
> Roy
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