Function build_cpython

cpython-windows/build.py:1363–1926

(
    python_entry_name: str,
    target_triple: str,
    arch: str,
    build_options: str,
    msvc_version: str,
    windows_sdk_version: str,
    openssl_archive,
    libffi_archive,
    openssl_entry: str,
)

def build_cpython(
    python_entry_name: str,
    target_triple: str,
    arch: str,
    build_options: str,
    msvc_version: str,
    windows_sdk_version: str,
    openssl_archive,
    libffi_archive,
    openssl_entry: str,
) -> pathlib.Path:
    parsed_build_options = set(build_options.split("+"))
    pgo = "pgo" in parsed_build_options
    freethreaded = "freethreaded" in parsed_build_options

    msbuild = find_msbuild(msvc_version)
    log("found MSBuild at %s" % msbuild)

    # The python.props file keys off MSBUILD, so it needs to be set.
    os.environ["MSBUILD"] = str(msbuild)

    python_archive = download_entry(python_entry_name, BUILD)
    entry = DOWNLOADS[python_entry_name]
    python_version = entry["version"]

    zlib_entry = (
        "zlib-ng" if meets_python_minimum_version(python_version, "3.14") else "zlib"
    )

    bzip2_archive = download_entry("bzip2", BUILD)
    sqlite_archive = download_entry("sqlite", BUILD)
    xz_archive = download_entry("xz", BUILD)
    zlib_archive = download_entry(zlib_entry, BUILD)

    setuptools_wheel = download_entry("setuptools", BUILD)
    pip_wheel = download_entry("pip", BUILD)

    # We use a prebuild tcl/tk from the upstream CPython project.
    # Tcl/tk 8.6.14+ has an additional runtime dependency. We are conservative and
    # use an old version prior to CPython 3.14. The older tck/tk release
    # is not available for arm64 so we use a newer release there as well.
    # On CPython 3.14+ we match the version included in the Python.org release.
    if meets_python_minimum_version(python_version, "3.15"):
        tk_bin_entry = "tk-windows-bin-903"
    elif meets_python_minimum_version(python_version, "3.14") or arch == "arm64":
        tk_bin_entry = "tk-windows-bin-8614"
    else:
        tk_bin_entry = "tk-windows-bin-8612"
    tk_bin_archive = download_entry(
        tk_bin_entry, BUILD, local_name="tk-windows-bin.tar.gz"
    )

    # On CPython 3.14+, zstd is included
    if meets_python_minimum_version(python_version, "3.14"):
        zstd_archive = download_entry("zstd", BUILD)
    else:
        zstd_archive = None