msvc.py 文件源码

def patch_for_specialized_compiler():
    """
    Patch functions in distutils to use standalone Microsoft Visual C++
    compilers.

    Known supported compilers:
    --------------------------
    Microsoft Visual C++ 9.0:
        Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64);
        Microsoft Windows SDK 7.0 (x86, x64, ia64);
        Microsoft Windows SDK 6.1 (x86, x64, ia64)

    Microsoft Visual C++ 10.0:
        Microsoft Windows SDK 7.1 (x86, x64, ia64)

    Microsoft Visual C++ 14.0:
        Microsoft Visual C++ Build Tools 2015 (x86, x64, arm)
    """
    if platform.system() != 'Windows':
        # Compilers only availables on Microsoft Windows
        return

    if 'distutils' not in globals():
        # The module isn't available to be patched
        return

    if unpatched:
        # Already patched
        return

    try:
        # Patch distutils.msvc9compiler
        unpatched['msvc9_find_vcvarsall'] = msvc9compiler.find_vcvarsall
        msvc9compiler.find_vcvarsall = msvc9_find_vcvarsall
        unpatched['msvc9_query_vcvarsall'] = msvc9compiler.query_vcvarsall
        msvc9compiler.query_vcvarsall = msvc9_query_vcvarsall
    except Exception:
        pass

    try:
        # Patch distutils._msvccompiler._get_vc_env
        unpatched['msvc14_get_vc_env'] = msvc14compiler._get_vc_env
        msvc14compiler._get_vc_env = msvc14_get_vc_env
    except Exception:
        pass