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v3.1.x: README: Add note about --with-foo and RPATH #5770

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Sep 27, 2018
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v3.1.x: README: Add note about --with-foo and RPATH #5770

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README: Add note about --with-foo and RPATH
jsquyres Sep 24, 2018
22f563e
README: additional clarification about --with-<foo>-libdir.
jsquyres Sep 25, 2018
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22 changes: 21 additions & 1 deletion README
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
University of Stuttgart. All rights reserved.
Copyright (c) 2004-2007 The Regents of the University of California.
All rights reserved.
Copyright (c) 2006-2017 Cisco Systems, Inc. All rights reserved.
Copyright (c) 2006-2018 Cisco Systems, Inc. All rights reserved.
Copyright (c) 2006-2011 Mellanox Technologies. All rights reserved.
Copyright (c) 2006-2012 Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2007 Myricom, Inc. All rights reserved.
Expand Down Expand Up @@ -761,6 +761,26 @@ Open MPI is unable to find relevant support for <foo>, configure will
assume that it was unable to provide a feature that was specifically
requested and will abort so that a human can resolve out the issue.

Additionally, if a search directory is specified in the form
--with-<foo>=<dir>, Open MPI will:

1. Search for <foo>'s header files in <dir>/include.
2. Search for <foo>'s library files:
2a. If --with-<foo>-libdir=<libdir> was specified, search in
<libdir>.
2b. Otherwise, search in <dir>/lib, and if they are not found
there, search again in <dir>/lib64.
3. If both the relevant header files and libraries are found:
3a. Open MPI will build support for <foo>.
3b. If the root path where the <foo> libraries are found is neither
"/usr" nor "/usr/local", Open MPI will compile itself with
RPATH flags pointing to the directory where <foo>'s libraries
are located. Open MPI does not RPATH /usr/lib[64] and
/usr/local/lib[64] because many systems already search these
directories for run-time libraries by default; adding RPATH for
them could have unintended consequences for the search path
ordering.

INSTALLATION OPTIONS

--prefix=<directory>
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