Warn about binutils 2.13 on Solaris.

README

@@ -244,6 +244,13 @@ Solaris: When using Sun's C compiler with threads, at least on Solaris
 	the "CC" environment variable when running the configure
 	script).
 
+        When using GCC on Solaris, beware of binutils 2.13 or GCC
+        versions built using it.  This mistakenly enables the
+        -zcombreloc option which creates broken shared libraries on
+        Solaris.  binutils 2.12 works, and the binutils maintainers
+        are aware of the problem, so binutils 2.13.1 will probably fix
+        this problem.
+
 Linux:  A problem with threads and fork() was tracked down to a bug in
 	the pthreads code in glibc version 2.0.5; glibc version 2.0.7
 	solves the problem.  This causes the popen2 test to fail;