Configure explicit GCC toolchain and Bzlmod version propagation.#363
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Integrate GCC as a configurable compiler option alongside Clang in the Gloop toolchain setup. Add a Bzlmod module extension (`extensions.bzl`) to dynamically resolve `CLANG_VERSION` and `GCC_VERSION` from the build environment (`--repo_env` flags written to `/etc/bazel.bazelrc` during Docker build), removing the need for manual Starlark version updates. Migrate TCMalloc CI to use the new lightweight `gloop-linux-toolchain-latest` image and register the explicit toolchains. Refactor the Dockerfile to move compiler packages (`build-essential`, `gcc`, `g++`) from the slim toolchain stage to the final execution stage, keeping the GHA runner image as lean as possible. PiperOrigin-RevId: 949334471
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Configure explicit GCC toolchain and Bzlmod version propagation.
Integrate GCC as a configurable compiler option alongside Clang in the Gloop toolchain setup.
Add a Bzlmod module extension (
extensions.bzl) to dynamically resolveCLANG_VERSIONandGCC_VERSIONfrom the build environment (--repo_envflags written to/etc/bazel.bazelrcduring Docker build), removing the need for manual Starlark version updates.Migrate TCMalloc CI to use the new lightweight
gloop-linux-toolchain-latestimage and register the explicit toolchains.Refactor the Dockerfile to move compiler packages (
build-essential,gcc,g++) from the slim toolchain stage to the final execution stage, keeping the GHA runner image as lean as possible.