Update protobuf library from 2.3 to 2.6.

Copied in all files from the open source protobuf project at commit
edc5994525c79cd1919859a370837a6ff7c8e308, removing files which have
been renamed (COPYING.txt -> LICENSE, README.txt -> README.md).

Removed 2.3 prebuilts, which is an approach that will not work due to
incompatibility with the 2.6 runtime.

Merged in micro/nano-specific changes in the following files:

-Android.mk - updated list of C++/Java sources, bumped versions
-java/README.txt - merged in micro/nano instructions, bumped versions
-java/pom.xml - merged in micro/nano build rules, set packaging to jar
-src/Makefile.am - merged in references to micro/nano generators
-src/google/protobuf/compiler/javamicro/javamicro_file.h - imported
 google/protobuf/compiler/code_generator.h and removed redundant
 OutputDirectory class.
-src/google/protobuf/compiler/javanano/javanano_file.h - same
-Replaced instances of vector with std::vector as needed to get
 libprotobuf-cpp-full to compile. Plan to upstream this fix per
 discussion with protobuf maintainers.

Reran autogen.sh to update ./configure and associated scripts.

Change-Id: I949d32fb5126f1c05e2a6ed48f6636a4a9b15a48

1 files changed, 55 insertions, 43 deletions

diff --git a/m4/stl_hash.m4 b/m4/stl_hash.m4
index 08813c9..0722b14 100644
--- a/m4/stl_hash.m4
+++ b/m4/stl_hash.m4
@@ -1,60 +1,72 @@
-# We check two things: where the include file is for hash_map, and
-# what namespace hash_map lives in within that include file.  We
+# We check two things: where the include file is for
+# unordered_map/hash_map (we prefer the first form), and what
+# namespace unordered/hash_map lives in within that include file.  We
 # include AC_TRY_COMPILE for all the combinations we've seen in the
-# wild.  We define one of HAVE_HASH_MAP or HAVE_EXT_HASH_MAP depending
-# on location, and HASH_NAMESPACE to be the namespace hash_map is
-# defined in.
-#
-# Ideally we'd use AC_CACHE_CHECK, but that only lets us store one value
-# at a time, and we need to store two (filename and namespace).
-# prints messages itself, so we have to do the message-printing ourselves
-# via AC_MSG_CHECKING + AC_MSG_RESULT.  (TODO(csilvers): can we cache?)
+# wild.  We define HASH_MAP_H to the location of the header file, and
+# HASH_NAMESPACE to the namespace the class (unordered_map or
+# hash_map) is in.  We define HAVE_UNORDERED_MAP if the class we found
+# is named unordered_map, or leave it undefined if not.
 
+# This also checks if unordered map exists.
 AC_DEFUN([AC_CXX_STL_HASH],
-  [AC_MSG_CHECKING(the location of hash_map)
-  AC_LANG_SAVE
+  [
+   AC_MSG_CHECKING(the location of hash_map)
+   AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
-   ac_cv_cxx_hash_map_header=""
-   ac_cv_cxx_hash_map_class=""
-   for location in [tr1/unordered_map ext/hash_map hash_map]; do
-     for namespace in [std::tr1 __gnu_cxx "" std stdext]; do
-       for name in [unordered_map hash_map]; do
-
-         if test -z "$ac_cv_cxx_hash_map_header"; then
-
-           # On OSX 1.5 / GCC 4.0.1 (the standard compiler on that platform),
-           # calling find() on a const unordered_map does not compile.  So, we
-           # include a call to find() in our test to detect this broken
-           # implementation and avoid using it.  Note that ext/hash_map works
-           # fine on this platform, so we'll end up using that.
-           AC_TRY_COMPILE([#include <$location>],
-                          [const ${namespace}::$name<int, int> t;
-                           t.find(1);],
-                          [ac_cv_cxx_hash_map_header="<$location>";
-                           ac_cv_cxx_hash_namespace="$namespace";
-                           ac_cv_cxx_hash_map_class="$name";])
-         fi
-       done
+   ac_cv_cxx_hash_map=""
+   # First try unordered_map, but not on gcc's before 4.2 -- I've
+   # seen unexplainable unordered_map bugs with -O2 on older gcc's.
+   AC_TRY_COMPILE([#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2))
+                   # error GCC too old for unordered_map
+                   #endif
+                   ],
+                   [/* no program body necessary */],
+                   [stl_hash_old_gcc=no],
+                   [stl_hash_old_gcc=yes])
+   for location in unordered_map tr1/unordered_map; do
+     for namespace in std std::tr1; do
+       if test -z "$ac_cv_cxx_hash_map" -a "$stl_hash_old_gcc" != yes; then
+         # Some older gcc's have a buggy tr1, so test a bit of code.
+         AC_TRY_COMPILE([#include <$location>],
+                        [const ${namespace}::unordered_map<int, int> t;
+                         return t.find(5) == t.end();],
+                        [ac_cv_cxx_hash_map="<$location>";
+                         ac_cv_cxx_hash_namespace="$namespace";
+                         ac_cv_cxx_hash_map_class="unordered_map";])
+       fi
      done
    done
-   ac_cv_cxx_hash_set_header=`echo "$ac_cv_cxx_hash_map_header" | sed s/map/set/`;
+   # Now try hash_map
+   for location in ext/hash_map hash_map; do
+     for namespace in __gnu_cxx "" std stdext; do
+       if test -z "$ac_cv_cxx_hash_map"; then
+         AC_TRY_COMPILE([#include <$location>],
+                        [${namespace}::hash_map<int, int> t],
+                        [ac_cv_cxx_hash_map="<$location>";
+                         ac_cv_cxx_hash_namespace="$namespace";
+                         ac_cv_cxx_hash_map_class="hash_map";])
+       fi
+     done
+   done
+   ac_cv_cxx_hash_set=`echo "$ac_cv_cxx_hash_map" | sed s/map/set/`;
    ac_cv_cxx_hash_set_class=`echo "$ac_cv_cxx_hash_map_class" | sed s/map/set/`;
-   if test -n "$ac_cv_cxx_hash_map_header"; then
+   if test -n "$ac_cv_cxx_hash_map"; then
       AC_DEFINE(HAVE_HASH_MAP, 1, [define if the compiler has hash_map])
       AC_DEFINE(HAVE_HASH_SET, 1, [define if the compiler has hash_set])
-      AC_DEFINE_UNQUOTED(HASH_MAP_H,$ac_cv_cxx_hash_map_header,
-                         [the location of <hash_map>])
-      AC_DEFINE_UNQUOTED(HASH_SET_H,$ac_cv_cxx_hash_set_header,
-                         [the location of <hash_set>])
+      AC_DEFINE_UNQUOTED(HASH_MAP_H,$ac_cv_cxx_hash_map,
+                         [the location of <unordered_map> or <hash_map>])
+      AC_DEFINE_UNQUOTED(HASH_SET_H,$ac_cv_cxx_hash_set,
+                         [the location of <unordered_set> or <hash_set>])
+      AC_DEFINE_UNQUOTED(HASH_NAMESPACE,$ac_cv_cxx_hash_namespace,
+                         [the namespace of hash_map/hash_set])
       AC_DEFINE_UNQUOTED(HASH_MAP_CLASS,$ac_cv_cxx_hash_map_class,
-                         [the name of <hash_set>])
+                         [the name of <hash_map>])
       AC_DEFINE_UNQUOTED(HASH_SET_CLASS,$ac_cv_cxx_hash_set_class,
                          [the name of <hash_set>])
-      AC_DEFINE_UNQUOTED(HASH_NAMESPACE,$ac_cv_cxx_hash_namespace,
-                         [the namespace of hash_map/hash_set])
-      AC_MSG_RESULT([$ac_cv_cxx_hash_map_header])
+      AC_MSG_RESULT([$ac_cv_cxx_hash_map])
    else
       AC_MSG_RESULT()
       AC_MSG_WARN([could not find an STL hash_map])
    fi
 ])
+