Updating documentation:
 - Document visibility stuff
 - Fix gcc' supported attributes list
 - Document udis86 configure option


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33462 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/GettingStarted.html b/docs/GettingStarted.html
index bda0cf8..41ec511 100644
--- a/docs/GettingStarted.html
+++ b/docs/GettingStarted.html
@@ -849,6 +849,11 @@
   documentation from the source code. This is disabled by default because 
   generating the documentation can take a long time and producess 100s of 
   megabytes of output.</dd>
+  <dt><i>--with-udis86</i></dt>
+  <dd>LLVM can use external disassembler library for various purposes (now it's
+  used only for examining code produced by JIT). This option will enable usage
+  of <a href="http://udis86.sourceforge.net/">udis86</a> x86 (both 32 and 64
+  bits) disassembler library.</dd>
 </dl>
 
 <p>To configure LLVM, follow these steps:</p>