Pedro

Prototype cc_shared_libary with example usage

Reported by @comius . Repro: ``` cd /tmp wget https://github.com/protocolbuffers/protobuf/releases/download/v27.0-rc1/protobuf-27.0-rc1.zip unzip protobuf-27.0-rc1.zip cd protobuf-27.0-rc1/examples/ bazel build //:all ``` Failure: ``` ERROR: /home/comius/.cache/bazel/_bazel_comius/ecd2c3661e608f19b46344e5624b778e/external/com_google_protobuf/src/google/protobuf/BUILD.bazel:238:11: Compiling src/google/protobuf/port.cc [for tool] failed: (Exit 1): gcc...

Fix sandboxing hermetic tmp to take into account sandbox_base

1

The logic for sandboxing hermetic tmp needs to take into account all paths under `/tmp` used during the build. A user may also pass a `sandbox_base` under `/tmp` even when...

This change introduces the flag `--experimental_inmemory_sandbox_stashes` to track in memory the contents of the stashes stored with `--reuse_sandbox_directories=true` With the old behavior Bazel has to perform a lot of I/O...