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Subject: [OMPI devel] SPARC V8+ question
From: Paul Hargrove (phhargrove_at_[hidden])
Date: 2014-01-29 18:10:54

I know Open MPI dropped support for the SPARC V8 ABI some time ago.
So, I configured with CC="gcc -mv8plus", but I still get:

checking if have Sparc v8+/v9 support... no
configure: WARNING: Sparc v8 target is not supported in this release of
Open MPI.
configure: WARNING: You must specify the target architecture v8plus
configure: WARNING: (cc: -xarch=v8plus, gcc: -mcpu=v9) for CFLAGS, CXXFLAGS,
configure: WARNING: FFLAGS, and FCFLAGS to compile Open MPI in 32 bit mode
configure: WARNING: Sparc processors
configure: error: Can not continue.

So, I am wondering if there is something flawed in the "have Sparc v8+/v9
support" or if gcc's "-mv8plus" is flawed.
Of course, I will follow the advise in the warning and use -mcpu=v9 instead
of -mv8plus, but don't see why the later didn't work. Any ideas what is
going on?

And since this was found in 1.7.4rc2:


Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900