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Macro to give option to preprocessor depending on the compiler ?

From: Sébastien Le Roux
Subject: Macro to give option to preprocessor depending on the compiler ?
Date: Tue, 03 Feb 2009 13:59:11 -0500
User-agent: Thunderbird (X11/20090105)

Hello everyone,

I have prepared a '' which tests both for Fortran compilers and MPI library. If configure is done using '--with-mpi' option then the configure looks for MPI libs and if succeed ad the option '-DMPI' for the compilation of some files (F90) of the code. So far everything fines except that I have noticed that some compilers (IBMs: mpxlf90/mpxlf95) do not allows such command. For these compilers you need to tell first to the preprocessor that you are defining a variable using '-WF,-DMPI' the only command '-DMPI' won't work. I wonder if there is a macro to find the good way to tell this to the preprocessor, if needed, and
so I guess, depending on the Fortran compiler ?

I do not know all Fortran compilers, but if IBM compilers are the only one having this issue
I can only add an option in the IBM cases ...

Thanks for your advises.

Dr. Sébastien Le Roux
Department of Physics
203 Dow Science
Central Michigan University
Mt. Pleasant, MI 48859, USA
E-mail:  address@hidden
Fax:   +1 (989) 774 2697
Phone: +1 (989) 774 3180

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