Add LLVM 20.1.0

[AlexDenisov]

It was released just yesterday, so not all binaries are available yet.

Happy to wait and update the PR when more artifacts are available if it is too soon 😄

[mering]

@fmeum Can we have a new release including this addition?

[AlexDenisov]

@mering while the new release would certainly be appreciated, you can use the snippet below to get access to this change:

bazel_dep(name = "toolchains_llvm", version = "1.3.0")
git_override(
    module_name = "toolchains_llvm",
    commit = "14eb90172b3c5f35bdb2699d006fe0f70e76aa24",
    remote = "https://github.com/bazel-contrib/toolchains_llvm",
)
# ...
llvm.toolchain(
    llvm_version = "20.1.0",
)

[mering]

@AlexDenisov Thanks but since we ship our module to customers, we are not the root module and therefore cannot use overrides.

[helly25]

@mering Instead of commit override and simple version config you can suggest a detailed config. The following specifies just the Linux X86 and MacOS Arm64 (not how we state 'darwin-aarch64'), but other platforms can be added by providing them in sha256, strip_prefix and urls.

llvm.toolchain(
    name = "llvm_toolchain_llvm",
    llvm_version = "20.1.0",
    sha256 = {
        "linux-x86_64": "954ac51498519f6ed9540714fb04bc401f70039b296a8160dd1559be380788d7",
        "darwin-aarch64": "2c42ec26ec50c4bf8b95585f762b9d2f5b385d170dee772d9c1d6c9a7190dcef",
    },
    strip_prefix = {
        "linux-x86_64": "LLVM-20.1.0-Linux-X64",
        "darwin-aarch64": "LLVM-20.1.0-macOS-ARM64",
    },
    urls = {
        "linux-x86_64": ["https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.0/LLVM-20.1.0-Linux-X64.tar.xz"],
        "darwin-aarch64": ["https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.0/LLVM-20.1.0-macOS-ARM64.tar.xz"],
    },
)

@fmeum I still would prefer an actual new version :-)