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Steffen Müthing authored
MPICH has stepped up its versioning scheme, jumping from MPICH2 1.x to MPICH 3.x, but has stayed compatible to the older MPICH2 versions. Unfortunately, the macro MPICH2_VERSION used by mpi_config.m4 to detect the package has been renamed to MPICH_VERSION. This patch fixes the problem by adding a separate test for MPICH_VERSION ana making sure that the macro starts with the letter "3".
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