bazel_sysroot_library

This sysroot provides common headers and system libraries shared across architectures for Bazel builds. It is designed to be used in conjunction with architecture-specific sysroots for AMD64 and ARM64.

Purpose

The bazel_sysroot_library sysroot serves as a common base for all architectures, providing:

• Common header files (.h) used across architectures
• Common system libraries (both shared .so and static .a)
• System dependencies that are architecture-independent

Directory Structure

sysroot/
├── include/     # Common header files
├── lib/         # Common system libraries
└── BUILD.sysroot.bazel

BUILD.sysroot.bazel

The BUILD file exposes the following targets:

1. Filegroups:

   • :all - Includes both :include and :lib
   • :include - All header files in the include directory
   • :lib - All library files in the lib directory

2. Library Targets:

   • :system_deps - Shared library target for dynamic linking
   • :system_deps_static - Static library target for static linking

Included Libraries

The sysroot includes the following common libraries and their headers:

• 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 in conjunction with architecture-specific sysroots:

llvm.sysroot(
    name = "llvm_toolchain",
    targets = ["linux-x86_64"],
    label = "@bazel_sysroot_tarball_amd64//:sysroot",
    include_prefix = "@bazel_sysroot_library//:include",
    lib_prefix = "@bazel_sysroot_lib_amd64//:lib",
    system_libs = [
        "@bazel_sysroot_library//:system_deps",
        "@bazel_sysroot_library//:system_deps_static",
    ],
)

Building

To build this sysroot:

nix-build default.nix

The output will be a directory containing the sysroot structure with all necessary files and the BUILD.sysroot.bazel file.