tree 75e54f7d213a59dbf62b378058018445ba2bb3c1
parent 6ceef1cdeb62f46f0ca9bca843d71bd30667f84f
author Adam Cozzette <acozzette@google.com> 1731616456 -0800
committer Copybara-Service <copybara-worker@google.com> 1731616620 -0800

C++: wrap generated DescriptorTable variable in extern "C" block

To implement extensions in Rust, we are going to need a symbol we can depend on
to force-link the C++ extension registration code. The `descriptor_table_xxxxx`
variable seems ideal for this: it already exists and is not public-facing, so
we can reuse it without increasing code size. This CL marks it `extern "C"` to
ensure that we can safely access it from Rust.

PiperOrigin-RevId: 696615312