On Tue, 2010-11-23 at 09:57 +0000, N.M. Maclaren wrote:

Damn Webmail! Sorry - please ignore this grobble - it got pasted in by accident, and is not true. I believe that there are such issues, but they are more subtle than that.

Are you concerned that there might be subtle issues with requiring any predefined macro, with _MPI being in the namespace reserved for the implementation, or both? Sincerely, Hal

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1. An implementation which provides wrapper scripts (i.e. mpicc). These scripts could easily add -D_MPI would prevent the conforming use of POSIX! See:

http://www.opengroup.org/onlinepubs/009695399/toc.htm 2.2 The Compilation Environment 2.2.1 POSIX.1 Symbols

Regards, Nick.

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