This however may not be what we finally want to support MPI_COMPLEX:
As with a possible difference of C99 _Bool and C++ Bool, we may want
to have a base opal_datatype_complex (as was initially in the
ompi-ddt branch), instead of assuming a struct of
opal_datatype_float... Think of stricter alignment.
The configure checks for (float/double/long double) complex have
been added with the ompi-ddt branch.
This commit was SVN r21756.
2989b65e68