执行buildman --fetch-arch arm提示"urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)>"如何处理？

答: 在uboot源码的tools/buildman/toolchain.py中取消证书验证，修改内容如下:

diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py

index a65737fdf8..94877f1047 100644

--- a/tools/buildman/toolchain.py

+++ b/tools/buildman/toolchain.py

@@ -8,6 +8,7 @@ from HTMLParser import HTMLParser

 import os

 import sys

 import tempfile

+import ssl

 import urllib2

 import bsettings

@@ -566,6 +567,7 @@ class Toolchains:

         # Fist get the URL for this architecture

         col = terminal.Color()

         print col.Color(col.BLUE, "Downloading toolchain for arch '%s'" % arch)

+        ssl._create_default_https_context = ssl._create_unverified_context

         url = self.LocateArchUrl(arch)

         if not url:

             print ("Cannot find toolchain for arch '%s' - use 'list' to list" %

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执行buildman --fetch-arch arm提示"urllib2.URLError: "如何处理？