[m-rev.] diff: document workaround for problem with Solaris 10

[Julien Fischer]

The following is from Peter Ross and is for the 11.07 branch only.

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Branches: 11.07

README.Solaris:
 	Describe a workaround for compilation problems on Solaris 10.

Julien.

Index: README.Solaris
===================================================================
RCS file: /home/mercury/mercury1/repository/mercury/README.Solaris,v
retrieving revision 1.2
diff -u -r1.2 README.Solaris
--- README.Solaris	15 Sep 2006 09:11:22 -0000	1.2
+++ README.Solaris	1 Aug 2012 05:11:48 -0000
@@ -5,3 +5,13 @@

  Also, note that `--linkage static' is not supported on Solaris.  Executables
  produced using this option will cause a segmentation fault.
+
+------------------------------------------------------------------------------
+
+With Solaris 10 on SPARC based systems the Mercury compiler needs to be built
+with C compiler optimizations disabled.  To do this put the line:
+
+    EXTRA_CFLAGS = -O0
+
+in a file named 'Mmake.params' in the top-level of the source tree.
+(i.e. in the same directory as this README file.)

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