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README: Update F08 language about IBM XL compiler #3827

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Jul 11, 2017
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README: Update F08 language about IBM XL compiler #3827

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11 changes: 8 additions & 3 deletions README
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ Copyright (c) 2006-2017 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.
Copyright (c) 2008 IBM Corporation. All rights reserved.
Copyright (c) 2008-2017 IBM Corporation. All rights reserved.
Copyright (c) 2010 Oak Ridge National Labs. All rights reserved.
Copyright (c) 2011 University of Houston. All rights reserved.
Copyright (c) 2013-2015 Intel, Inc. All rights reserved
Expand Down Expand Up @@ -180,8 +180,13 @@ Compiler Notes
source directory path names that was resolved in 9.0-4 (9.0-3 is
known to be broken in this regard).

- IBM's xlf compilers: NO known good version that can build/link
the MPI f08 bindings or build/link the OSHMEM Fortran bindings.
- OpenSHMEM Fortran bindings do not support the `no underscore` Fortran
symbol convention. IBM's xlf compilers build in that mode by default.
As such, IBM's xlf compilers cannot build/link the OpenSHMEM Fortran
bindings by default. A workaround is to pass FC="xlf -qextname" at
configure time to force a trailing underscore. See the issue below
for more details:
https://github.com/open-mpi/ompi/issues/3612

- On NetBSD-6 (at least AMD64 and i386), and possibly on OpenBSD,
libtool misidentifies properties of f95/g95, leading to obscure
Expand Down