try: import distutils.msvc9compiler except Exception: pass unpatched = dict() def patch_for_specialized_compiler(): """ Patch functions in distutils.msvc9compiler to use the standalone compiler build for Python (Windows only). Fall back to original behavior when the standalone compiler is not available. """ if 'distutils' not in globals(): # The module isn't available to be patched return if unpatched: # Already patched return unpatched.update(vars(distutils.msvc9compiler)) distutils.msvc9compiler.find_vcvarsall = find_vcvarsall distutils.msvc9compiler.query_vcvarsall = query_vcvarsall def find_vcvarsall(version): Reg = distutils.msvc9compiler.Reg VC_BASE = r'Software\%sMicrosoft\DevDiv\VCForPython\%0.1f' key = VC_BASE % ('', version) try: # Per-user installs register the compiler path here productdir = Reg.get_value(key, "installdir") except KeyError: try: # All-user installs on a 64-bit system register here key = VC_BASE % ('Wow6432Node\\', version) productdir = Reg.get_value(key, "installdir") except KeyError: productdir = None if productdir: import os vcvarsall = os.path.join(productdir, "vcvarsall.bat") if os.path.isfile(vcvarsall): return vcvarsall return unpatched['find_vcvarsall'](version) def query_vcvarsall(version, *args, **kwargs): try: return unpatched['query_vcvarsall'](version, *args, **kwargs) except distutils.errors.DistutilsPlatformError as exc: if exc and "vcvarsall.bat" in exc.args[0]: message = 'Microsoft Visual C++ %0.1f is required (%s).' % (version, exc.args[0]) if int(version) == 9: # This redirection link is maintained by Microsoft. # Contact vspython@microsoft.com if it needs updating. raise distutils.errors.DistutilsPlatformError( message + ' Get it from http://aka.ms/vcpython27' ) raise distutils.errors.DistutilsPlatformError(message) raise