bazel_sysroot_lib_arm64

This sysroot provides ARM64-specific shared libraries for Bazel builds. It is part of a larger system of sysroots that work together to provide a complete build environment.

Purpose

The bazel_sysroot_lib_arm64 sysroot is responsible for providing ARM64-specific shared libraries that are required for building and running applications on ARM64 architectures. It works in conjunction with:

• bazel_sysroot_library - Provides common headers and system libraries
• bazel_sysroot_llvm_arm64 - Provides ARM64-specific LLVM tools

Directory Structure

sysroot/
└── lib/           # ARM64-specific shared libraries
    └── *.so*      # Shared library files

BUILD File Targets

The BUILD.sysroot.bazel file defines the following targets:

filegroup(
    name = "all",
    srcs = [":lib"],
)

filegroup(
    name = "lib",
    srcs = glob(["lib/**"]),
    allow_empty = True,
)

cc_library(
    name = "system_libs",
    srcs = glob(["lib/*.so*"]),
    linkstatic = 1,
    visibility = ["//visibility:public"],
)

Included Libraries

This sysroot includes ARM64-specific versions of:

• Core system libraries:
  • glibc
  • gcc-unwrapped
• Compression libraries:
  • zlib
  • bzip2
  • xz
• XML and parsing:
  • libxml2
  • expat
• Networking:
  • openssl
  • curl
• Text processing:
  • pcre
  • pcre2
• JSON:
  • jansson
• Database:
  • sqlite
• Image processing:
  • libpng
  • libjpeg
• System utilities:
  • util-linux

Usage in Bazel

This sysroot is typically used as part of the LLVM toolchain configuration in your MODULE.bazel:

llvm_toolchain(
    name = "llvm_arm64",
    llvm_version = "20.1.2",
    build_file = "//:llvm.BUILD",
    sysroot = {
        "include_prefix": "@bazel_sysroot_library//sysroot",
        "lib_prefix": "@bazel_sysroot_lib_arm64//sysroot",
    },
)

Building

To build this sysroot:

nix-build default.nix

The resulting sysroot will be available in the result/sysroot directory.