Support building all variants. am: 07b3f15069 am: 13f859a696

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/protobuf/+/1355991

Change-Id: I120e28a48da7e3c47016dc2f9026f3495aeb5c5b
tree: 8c2ed8c6e37060f193e1ffdd4e7bcd0e6c50b7a1
  1. benches/
  2. out/
  3. src/
  4. .cargo_vcs_info.json
  5. Android.bp
  6. build.rs
  7. Cargo.toml
  8. Cargo.toml.orig
  9. LICENSE.txt
  10. METADATA
  11. MODULE_LICENSE_BSD_LIKE
  12. OWNERS
  13. README.md
  14. regenerate.sh
README.md

How to develop rust-protobuf itself

cargo test --all to build everything.

If code generator is changed, code needs to be regenerated, see regenerate.sh.