On 18/08/06, Brian Barrett <brbar...@open-mpi.org> wrote:
On Aug 17, 2006, at 4:43 PM, Jonathan Underwood wrote:
> Compiling an mpi program with gcc options -pedantic -Wall gives the
> following warning:
>
> mpi.h:147: warning: ISO C90 does not support 'long long'
>
> So it seems that the openmpi implementation doesn't conform to C90. Is
> this by design, or should it be reported as a bug?
Well, MPI_LONG_LONG is a type we're supposed to support, and that
means having 'long long' in the mpi.h file. I'm not really sure how
to get around this, especially since there are a bunch of users out
there that rely on MPI_LONG_LONG to send 64 bit integers around on 32
bit platforms. So I suppose that it's by design.
OK, that seems reasonable.
I wonder then if the non-C90 conforming parts should be surrounded
with #ifndef __STRICT_ANSI__ - this is predefined when gcc is
expecting C90 conforming code. I am not sure if this is portable to
other compilers however. Probably not.
Best wishes,
Jonathan
