mirror of
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112 lines
4.2 KiB
Plaintext
112 lines
4.2 KiB
Plaintext
Name: Protocol Buffers
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Short Name: protobuf
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URL: https://github.com/google/protobuf
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License: BSD
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License File: LICENSE
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Version: 3.3.0
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Revision: 040f56e61b379e92dfdf107b12244a7580f60823
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Security Critical: yes
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Steps used to create the current version:
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1. Pull the release from https://github.com/google/protobuf/releases
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2. Add build files (BUILD.gn, proto_library.gni).
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Be sure to update the list of source files, as additional .cc files and
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headers might have been added -- you need to find the transitive closure of
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include files required by targets.
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Other things to care about are defines required by protobuf on various
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platforms, warnings generated by compilers, and new dependencies introduced.
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3. Add DEPS and OWNERS.
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4. Add mirclient.cc and mirclient.map.
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5. Get open-source library six.py from https://pypi.python.org/pypi/six/ and add
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it to protobuf/third_party/six/six.py.
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6. Apply patches in patches/ (see the description below):
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$ for patch in patches/*; do patch -s -p1 < $patch; done
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For future releases, it will be worth looking into which patches still need
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to be applied. In case of conflict, update those patches accordingly and save
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them back in place (i.e. in patches directory).
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7. Generate well_known_types_embed.cc and descriptor_pb2.py using something like
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the following steps. Make sure you've regenerated your buildfiles and will
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build js_embed then protoc from the newly-modified sources above.
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$ cd $SRC_DIR
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$ gn gen out/Debug
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$ ninja -C out/Debug js_embed
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$ cd third_party/protobuf/src/google/protobuf/compiler/js
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$ $SRC_DIR/out/Debug/js_embed \
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./well_known_types/any.js ./well_known_types/struct.js \
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./well_known_types/timestamp.js > well_known_types_embed.cc
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$ cd $SRC_DIR
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$ ninja -C out/Debug protoc
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$ cd third_party/protobuf/src
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$ $SRC_DIR/out/Debug/protoc --python_out=../python google/protobuf/descriptor.proto
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8. Add an __init__.py to protobuf/ that adds third_party/six/ to Python path.
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9. Update README.chromium.
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Note about libmirclient:
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On Ubuntu, Chromium has an indirect dependency on the system
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libprotobuf-lite through libmirclient (through GTK). The symbols in
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the system library conflict with Chromium's libprotobuf-lite used on
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component builds.
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mirclient.* are added to stub out libmirclient.so.9 to prevent loading
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the system libprotobuf-lite. Chromium's replacement libmirclient will
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get loaded, but its symbols will never be used directly or indirectly.
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Description of the patches:
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- 0003-remove-static-initializers.patch
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This patch removes all static initializers from Chromium. The change in Status
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class is not completely compatible with upstream, but it's compatible enough
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to work in Chromium, which doesn't use this functionality yet. The work on
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upstreaming the removal of static initializers is in progress:
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https://github.com/google/protobuf/issues/1404
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- 0004-fix-integer-types-and-shared-library-exports.patch
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This patch makes protobuf int64 to be int64_t (as opposed to long long in
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upstream), and similarly for other integer types. It also allows exporting
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protobuf symbols in Linux .so libraries, so that protobuf can be built as a
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component (see http://crrev.com/179806).
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- 0007-uninline_googleonce.patch
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- 0008-uninline_get_empty_string.patch
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- 0009-uninline-arenastring.patch
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- 0010-uninline-generated-code.patch
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These patches uninline some functions, resulting in a significant reduction
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(somewhere between 500 KB and 1 MB) of binary size.
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- 0012-fixes-for-js-embed-cc.patch
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Fixed in https://github.com/google/protobuf/pull/1549
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- 0013-fixes-expansion-to-defined.patch
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Fixes a macro whose expansion has a defined() in it. This is
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results in undefined behavior and some compilers will warn/error
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when seeing this.
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- 0014-truncate-uint8-constants.patch
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Fixed upstream in CL 161573822
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- 0015-fixes-forcing-value-to-bool.patch
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Fixes an MSVC error that forbids conversion from int to bool. Needs
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to be upstreamed.
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- 0014-truncate-uint8-constants.patch
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Fixed upstream in CL 163270735
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- 0017-constexpr-for-vs-2017.patch
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Define PROTOBUF_CONSTEXPR_VAR as constexpr for VS 2017, also landed upstream
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as https://github.com/google/protobuf/commit/210be267fd81d5aafdc049d197d57cb45b75f3ba |