On 1/19/2012 5:22 PM, Paul H. Hargrove wrote:
Minor documentation nit, which might apply to the 1.5 branch as well (didn't check).

README says:
- Open MPI does not support the Sparc v8 CPU target, which is the
  default on Sun Solaris.  The v8plus (32 bit) or v9 (64 bit)
  targets must be used to build Open MPI on Solaris.  This can be
  done by including a flag in CFLAGS, CXXFLAGS, FFLAGS, and FCFLAGS,
  -xarch=v8plus for the Sun compilers, -mcpu=v9 for GCC.

However, following that instruction w/ Sun Studio 12 Update 2 yields:
cc: Warning: -xarch=v8plus is deprecated, use -m32 -xarch=sparc instead
for every single compilation.

I vaguely recall noting this once before, perhaps 2 years or so.

Additionally, it appears that the "Sun" example is for the 32-bit ABI and the "GCC" example for the 64-bit ABI.
Actually I think the whole comment is incorrect (at least from Solaris Studio 12u2 on) in that the default is no longer SPARC v8 target and that one can actually specify just -m32 and -m64 without the -xarch option.  So I wonder if we should just strike that whole block of text from the README.

Terry D. Dontje | Principal Software Engineer
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