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5.8.2 Getting started

Compile your MPI application as usual, taking care to link it using the same ‘mpicc’ that your Valgrind build was configured with.

Use the following basic scheme to run your application on Valgrind with the wrappers engaged:

MPIWRAP_DEBUG=[wrapper-args] \
LD_PRELOAD=$prefix/lib/valgrind/<platform>/libmpiwrap.so \
   mpirun [mpirun-args] \
   $prefix/bin/valgrind [valgrind-args] \
   [application] [app-args]

As an alternative to ‘LD_PRELOAD’ing ‘libmpiwrap.so’, you can simply link it to your application if desired. This should not disturb native behaviour of your application in any way.