Initial draft of PNaCl bitcode files.

native_client_sdk/src/doc/devguide/devcycle/building.rst

Index: native_client_sdk/src/doc/devguide/devcycle/building.rst
diff --git a/native_client_sdk/src/doc/devguide/devcycle/building.rst b/native_client_sdk/src/doc/devguide/devcycle/building.rst
index 3d94758ec89ec4044c9fec793e766a3cef341f4a..a9af546a52f9ac0b9450a759d0f0b536f159106d 100644
--- a/native_client_sdk/src/doc/devguide/devcycle/building.rst
+++ b/native_client_sdk/src/doc/devguide/devcycle/building.rst
@@ -142,6 +142,8 @@ pnacl-abicheck
   Checks that the **pexe** follows the PNaCl ABI rules.
 pnacl-ar
   Creates archives (i.e., static libraries)
+pnacl-bcdis
+  Objdumper for PNaCl bitcode files.
 pnacl-clang
   C compiler and compiler driver
 pnacl-clang++
@@ -366,6 +368,24 @@ want to configure your web server to gzip **pexe** files: the gzipped version of
 a compressed **pexe** file is smaller than the corresponding uncompressed
 **pexe** file by 7.5% to 10%.
 
+.. _pnacl-bcdis:
+
+Objumping PNaCl Bitcode files
+=============================
+
+Sometimes you may be interesting in the contents of a PNaCl bitcode
+file.  The tool ``pnacl-bcdis`` objdumps the contents of a PNaCl
+bitcode file.  For a description of the output produced by this tool,
+see :doc:`/reference/pnacl-bitcode-manual`.
+
+.. naclcode::
+ :prettyprint: 0
+
+  nacl_sdk/pepper_<version>/toolchain/win_pnacl/bin/pnacl-bcdis \
+    hello_world.final.pexe
+
+The output is the corresponding contents of the given **pexe**.
+
 The GNU-based toolchains
 ========================