Partial CMakeLists to compile the real icing C++ lib.
Limitations:
* Currently using execute_process instead of add_custom_command, which
causes protobuf compilation to occur during configure. We need to
build protoc on the host, so trying to use add_custom_command to do it
during the target build is complicated.
* Invoking protoc directly instead of using FindProtobuf and
protobuf_generate_cpp. I was able to get FindProtobuf to work with the
external/protobuf source tree, but I can't get protobuf_generate_cpp
to put the generated protos in the right place.
* Icing lib is missing utf dependencies, so this does not currently
compile.
* No work has been done on the link step; we'll have to find a way to
compile libprotobuf-lite for the target and depend on it.
Test: ./gradlew icing:assemble
Bug: 149853706
Change-Id: I0568efe23f255b1fca463891ebd816aca5979841
4 files changed