[MPICH] mixing MPI with other libraries

[James S Perrin]

Hi,
	mpicc and mpicxx are scripts that simple add the correct include path, and 
library path and libraries if linking, to the compile command. It will call the 
default C or C++ compiler with the added arguments. You don't need to added any 
mpich specific paths/libs yourself. So you can use the scripts to compile and 
standard projects.

	Since mpicxx doesn't actaul compile you code but the default compiler, say g++, 
thst will respond to compiling c code in exactly the same way as the it would if 
called directly. Further mpicxx simply passes the mpich cxx library as and 
additional argument. If you have used any C++ MPI calls then it will be ignored 
(you may get a "not used for linked warning")

Regards
James

Kevin C. wrote:


> 1. If one had an existing project, say a GTK or QT application with 
> Makefile and everything. If one wanted to incorporate MPI into this 
> project, one would just replace (in the Makefile) the 'GCC = gcc' to 
> 'GCC = mpicc', 'GXX = g++' to 'GXX = mpicxx', and also maybe include 
> some MPI lib paths to the INCPATHs? Is this how one can convert normal 
> projects into projects incorporating MPI calls?
> 
> 2. If one had an existing C MPI program. What would be the side-effects 
> of using the mpicxx to compile C code? Is it strict for one to use the 
> MPI:: classes opposed to MPI_ C functions.. when force compiling under C++?
-- 
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James S. Perrin,                   | email: james.perrin at manchester.ac.uk
Manchester Visualization Centre,   | www.sve.man.ac.uk/General/Staff/perrin
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Manchester, England. M13 9PL.      | fax: +44 161 275 6800/6040
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