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5506155fa1
Compiling Gecko with libc++ and GCC 4.9 on Android runs into a problem.
The protobuf #includes and libc++ result in preprocessed code that looks
something like:
/* via <iterator> */
namespace std {
namespace __1 {
}
using namespace __1 __attribute__((__strong__));
}
namespace std { namespace __1 {
template <class _Iter>
class __wrap_iter
{
...
template <class _Tp, class _Alloc> friend class vector;
...
};
} // namespace __1
} // namespace std
/* via <vector> */
namespace std { namespace __1 {
template <class _Tp, class _Alloc>
class _LIBCPP_TYPE_VIS_ONLY vector : ...
{ ... };
} // namespace __1
} // namespace std
and the problem is that GCC doesn't understand that the forward
declaration of vector inside __wrap_iter is forward-declaring the actual
vector class; it thinks it's declaring something else.
Hacking <iterator> to include _LIBCPP_TYPE_VIS_ONLY for the forward
declaration doesn't help. What does help is including <vector> earlier
than <iterator>, so the __wrap_iter forward declaration picks up the
correct definition of std::vector, and makes everything happy. It's
possible that there are other places that could get this same treatment,
but this one place was the only one I needed to modify to make things
go.
|
||
|---|---|---|
| .. | ||
| src/google/protobuf | ||
| COPYING.txt | ||
| m-c-changes.patch | ||
| moz.build | ||
| README.txt | ||
| upgrade_protobuf.sh | ||
Protocol Buffers (protobuf) source is available (via svn) at:
svn checkout http://protobuf.googlecode.com/svn/trunk/ protobuf-read-only
Or via git at:
https://github.com/google/protobuf
This code is covered under the BSD license (see COPYING.txt). Documentation is
available at http://code.google.com/p/protobuf.
The tree's current version of the protobuf library is 2.6.1.
We do not include the protobuf tests or the protoc compiler.
--------------------------------------------------------------------------------
# Upgrading the Protobuf Library
1. Get a new protobuf release from https://github.com/google/protobuf/releases
2. Run `$ ./toolkit/components/protobuf/upgrade_protobuf.sh ~/path/to/release/checkout/of/protobuf`.
3. Update the moz.build to export the new set of headers and add any new .cc
files to the unified sources and remove old ones.