toolchains.bzl

load("@envoy_repo//:compiler.bzl", "LLVM_PATH", "USE_LOCAL_SYSROOT")
load("@envoy_toolshed//repository:utils.bzl", "arch_alias")
load("@toolchains_llvm//toolchain:rules.bzl", "llvm_toolchain")

def envoy_toolchains():
    native.register_toolchains("@envoy//bazel/rbe/toolchains/configs/linux/gcc/config:cc-toolchain")
    arch_alias(
        name = "clang_platform",
        aliases = {
            "amd64": "@envoy//bazel/platforms/rbe:linux_x64",
            "aarch64": "@envoy//bazel/platforms/rbe:linux_arm64",
        },
    )
    llvm_toolchain(
        name = "llvm_toolchain",
        llvm_version = "18.1.8",
        # These libs are only included for cross-compile targets
        cxx_cross_lib = {
            "linux-aarch64": "@libcxx_libs_aarch64",
            "linux-x86_64": "@libcxx_libs_x86_64",
        },
        cxx_standard = {"": "c++20"},
        sysroot = {} if USE_LOCAL_SYSROOT else {
            "linux-x86_64": "@sysroot_linux_amd64//:sysroot",
            "linux-aarch64": "@sysroot_linux_arm64//:sysroot",
        },
        toolchain_roots = {"": LLVM_PATH} if LLVM_PATH else {},
    )