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Update mpi-apps.inc #404

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20 changes: 19 additions & 1 deletion faq/mpi-apps.inc
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Original file line number Diff line number Diff line change
Expand Up @@ -835,7 +835,19 @@ $a[] = "The [blacs_install.ps] file (available from that web site)
describes how to build BLACS, so we won't repeat much of it here
(especially since it might change in future versions). These
instructions only pertain to making Open MPI work correctly with
BLACS.
BLACS. Note that it uses the older BMake, rather than CMake.

<blockquote>
<font color=\"red\"><strong>NOTE:</strong></font> From at least ScaLAPACK 2.1.0, BLACS
is part of the ScaLAPACK distribution. This instruction is for installation without
ScaLAPACK.

Additionally, if compiling with gcc 10 or newer, use the following flags:

NOOPT = -O3 -std=legacy

FCFLAGS = -O3 -std=legacy
</blockquote>

After selecting the appropriate starting [Bmake.inc], make the
following changes to Sections 1, 2, and 3. The example below is from
Expand Down Expand Up @@ -893,6 +905,12 @@ $q[] = "How do I build ScaLAPACK with Open MPI?";

$anchor[] = "scalapack";

<blockquote>
<font color=\"red\"><strong>NOTE:</strong></font> From at least ScaLAPACK 2.1.0, BLACS
is part of the ScaLAPACK distribution. Accordingly, follow the instructions there.
Use the more modern mpifort flag for FC.
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</blockquote>

$a[] = "The [scalapack_install.ps] file (available from that web site)
describes how to build ScaLAPACK, so we won't repeat much of it here
(especially since it might change in future versions). These
Expand Down