* Fix for issue #144. With the opal_atomic_lifo code, we can no longer build

on platforms without a 32-bit compare and swap implementation.  There isn't
  such a thing on Sparc v8 chips, so we can't support those platforms right
  now.  Should be possible to make opal_atomic_lifo less atomic on these
  platforms, but not in the time allotted.

This commit was SVN r10407.

README

@@ -106,6 +106,12 @@ base as of this writing (17 Jun 2006):
   supported if you supply the following command line option to
   configure: LDFLAGS=-Wl,-brtl.
 
+- 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, -mv8plus for GCC.
+
 - At least some versions of the Intel 8.1 compiler seg fault while
   compiling certain Open MPI source code files.  As such, it is not
   supported.

config/ompi_config_asm.m4

@@ -859,13 +859,12 @@ AC_DEFUN([OMPI_CONFIG_ASM],[
                 if test "$have_v8plus" = "0" ; then
                     OMPI_ASM_SUPPORT_64BIT=0
                     ompi_cv_asm_arch="SPARC"
-AC_MSG_WARN([Using SPARC V8 assembly for atomic operations.  This])
-AC_MSG_WARN([may result in reduced performance on UltraSparc platforms.])
-AC_MSG_WARN([If you are compiling for the UltraSparc, consider ])
-AC_MSG_WARN([specifying the architecture v8plus (cc: -xarch=v8plus, ])
-AC_MSG_WARN([gcc: -mv8plus) when compiling Open MPI, as you may see a])
-AC_MSG_WARN([significant performance increase.])
-
+AC_MSG_WARN([Sparc v8 target is not supported in this release of Open MPI.])
+AC_MSG_WARN([You must specify the target architecture v8plus])
+AC_MSG_WARN([(cc: -xarch=v8plus, gcc: -mv8plus) for CFLAGS, CCXXFLAGS,])
+AC_MSG_WARN([FFLAGS, and FCFLAGS to compile Open MPI in32 bit mode on])
+AC_MSG_WARN([Sparc processors])
+AC_MSG_ERROR([Can not continue.])
                 else
                     OMPI_ASM_SUPPORT_64BIT=1
                     ompi_cv_asm_arch="SPARCV9_32"