我正在尝试在MAC OS X Yosemite V10.10.1上安装Python软件包（PIP）junos-eznc，我不知道为什么我收到以下错误？
“错误：命令'/ usr / bin / clang'失败，退出状态为69”
这是输出日志：
mac231s-MacBook-Air:~ macbookair$ pip install junos-eznc
Requirement already satisfied (use --upgrade to upgrade): junos-eznc in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages
Downloading/unpacking lxml>=3.2.4 (from junos-eznc)
Downloading lxml-3.4.1.tar.gz (3.5MB): 3.5MB downloaded
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml/setup.py) egg_info for package lxml
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.1.
Building without Cython.
Using build configuration of libxslt 1.1.28
warning: no previously-included files found matching '*.py'
Downloading/unpacking ncclient>=0.4.1 (from junos-eznc)
Downloading ncclient-0.4.3.tar.gz (55kB): 55kB downloaded
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/ncclient/setup.py) egg_info for package ncclient
Requirement already satisfied (use --upgrade to upgrade): paramiko in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from junos-eznc)
Downloading/unpacking scp>=0.7.0 (from junos-eznc)
Downloading scp-0.8.0.tar.gz
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/scp/setup.py) egg_info for package scp
Downloading/unpacking jinja2>=2.7.1 (from junos-eznc)
Downloading Jinja2-2.7.3.tar.gz (378kB): 378kB downloaded
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/jinja2/setup.py) egg_info for package jinja2
warning: no files found matching '*' under directory 'custom_fixers'
warning: no previously-included files matching '*' found under directory 'docs/_build'
warning: no previously-included files matching '*.pyc' found under directory 'jinja2'
warning: no previously-included files matching '*.pyc' found under directory 'docs'
warning: no previously-included files matching '*.pyo' found under directory 'jinja2'
warning: no previously-included files matching '*.pyo' found under directory 'docs'
Downloading/unpacking PyYAML>=3.10 (from junos-eznc)
Downloading PyYAML-3.11.tar.gz (248kB): 248kB downloaded
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/PyYAML/setup.py) egg_info for package PyYAML
Downloading/unpacking netaddr (from junos-eznc)
Downloading netaddr-0.7.13-py2.py3-none-any.whl (1.5MB): 1.5MB downloaded
Requirement already satisfied (use --upgrade to upgrade): setuptools>0.6 in /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (from ncclient>=0.4.1->junos-eznc)
Downloading/unpacking markupsafe (from jinja2>=2.7.1->junos-eznc)
Downloading MarkupSafe-0.23.tar.gz
Running setup.py (path:/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/markupsafe/setup.py) egg_info for package markupsafe
Installing collected packages: lxml, ncclient, scp, jinja2, PyYAML, netaddr, markupsafe
Running setup.py install for lxml
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.1.
Building without Cython.
Using build configuration of libxslt 1.1.28
building 'lxml.etree' extension
/usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/usr/include/libxml2 -I/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml/src/lxml/includes -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace
Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.
error: command '/usr/bin/clang' failed with exit status 69
Complete output from command /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -c "import setuptools, tokenize;__file__='/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip-r8LGdK-record/install-record.txt --single-version-externally-managed --compile:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.1.
Building without Cython.
Using build configuration of libxslt 1.1.28
running install
running build
running build_py
creating build
creating build/lib.macosx-10.6-intel-2.7
creating build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/__init__.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/_elementpath.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/builder.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/cssselect.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/doctestcompare.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/ElementInclude.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/pyclasslookup.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/sax.py -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/usedoctest.py -> build/lib.macosx-10.6-intel-2.7/lxml
creating build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/__init__.py -> build/lib.macosx-10.6-intel-2.7/lxml/includes
creating build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/__init__.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/_diffcommand.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/_html5builder.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/_setmixin.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/builder.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/clean.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/defs.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/diff.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/ElementSoup.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/formfill.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/html5parser.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/soupparser.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
copying src/lxml/html/usedoctest.py -> build/lib.macosx-10.6-intel-2.7/lxml/html
creating build/lib.macosx-10.6-intel-2.7/lxml/isoschematron
copying src/lxml/isoschematron/__init__.py -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron
copying src/lxml/lxml.etree.h -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/lxml.etree_api.h -> build/lib.macosx-10.6-intel-2.7/lxml
copying src/lxml/includes/c14n.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/config.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/dtdvalid.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/etreepublic.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/htmlparser.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/relaxng.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/schematron.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/tree.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/uri.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xinclude.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xmlerror.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xmlparser.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xmlschema.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xpath.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/xslt.pxd -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/etree_defs.h -> build/lib.macosx-10.6-intel-2.7/lxml/includes
copying src/lxml/includes/lxml-version.h -> build/lib.macosx-10.6-intel-2.7/lxml/includes
creating build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources
creating build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/rng
copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/rng
creating build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl
creating build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -> build/lib.macosx-10.6-intel-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build/temp.macosx-10.6-intel-2.7
creating build/temp.macosx-10.6-intel-2.7/src
creating build/temp.macosx-10.6-intel-2.7/src/lxml
/usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -arch i386 -arch x86_64 -g -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/usr/include/libxml2 -I/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml/src/lxml/includes -I/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.macosx-10.6-intel-2.7/src/lxml/lxml.etree.o -w -flat_namespace
Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo.
error: command '/usr/bin/clang' failed with exit status 69
----------------------------------------
Cleaning up...
Command /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -c "import setuptools, tokenize;__file__='/private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip-r8LGdK-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /private/var/folders/g_/4gqvq3096kg5sg6thyyh3j4h0000gp/T/pip_build_macbookair/lxml
Storing debug log for failure in /Users/macbookair/.pip/pip.log
答案 0 :(得分：11)
正如错误消息所示，您需要同意XCode许可证才能使用其任何工具，包括clang。为此，请从命令行运行：
sudo xcrun cc
您需要输入密码（假设您的用户帐户具有管理员权限），然后完成同意许可的过程。完成后，您可以运行
pip install junos-eznc
你应该全力以赴。