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@@ -365,6 +365,14 @@ AC_ARG_ENABLE(mpi, [AS_HELP_STRING([--disable-mpi],
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[enable_mpi=$enableval],
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[enable_mpi=$default_enable_mpi])
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+if test x$enable_mpi = xmaybe ; then
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+ if test -x "$mpicc_path"; then
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+ enable_mpi=yes
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+ else
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+ enable_mpi=no
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+ fi
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+fi
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+
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# in case MPI was explicitely required, but mpicc is not available, this is an error
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if test x$enable_mpi = xyes -a ! -x "$mpicc_path"; then
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AC_MSG_ERROR([Compiler MPI '$mpicc_path' not valid])
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