lxml 永远不会在 ubuntu 上完成构建
lxml will never finish building on ubuntu
我在 vwmare 上 运行ning ubuntu 14.04 LTS 和 python 2.7.5。
当我运行:
sudo pip install lxml
我得到：
Collecting lxml
Using cached lxml-3.4.4.tar.gz
Building wheels for collected packages: lxml
Running setup.py bdist_wheel for lxml
运行永恒。
我找不到任何与此相关的资源，我也没有遇到过类似的错误。
请注意，以下解决方案不起作用：
sudo apt-get build-dep -y lxml;
pip install lxml
我也试过：
sudo apt-get install -y build-essential python-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version.
python-dev is already the newest version.
The following packages were automatically installed and are no longer required:
linux-headers-3.13.0-32 linux-headers-3.13.0-32-generic
linux-headers-3.13.0-57 linux-headers-3.13.0-57-generic
linux-image-3.13.0-32-generic linux-image-3.13.0-57-generic
linux-image-extra-3.13.0-32-generic linux-image-extra-3.13.0-57-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 75 not upgraded.
编辑：
我刚刚 运行 又得到了：
sudo pip install lxml
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Using cached lxml-3.4.4.tar.gz
Building wheels for collected packages: lxml
Running setup.py bdist_wheel for lxml
编辑 2：
pip install lxml
The directory '/home/myusername/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/myusername/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading lxml-3.4.4.tar.gz (3.5MB)
100% |████████████████████████████████| 3.5MB 7.0kB/s
Installing collected packages: lxml
Running setup.py install for lxml
编辑 3：
等待很长时间后命令给出：
pip install lxml
The directory '/home/mstaffel/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/mstaffel/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading lxml-3.4.4.tar.gz (3.5MB)
100% |████████████████████████████████| 3.5MB 7.0kB/s
Installing collected packages: lxml
Running setup.py install for lxml
Complete output from command /usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-u3iJ67/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-0tAWPp-record/install-record.txt --single-version-externally-managed --compile:
/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.4.
Building without Cython.
Using build configuration of libxslt 1.1.28
running install
running build
running build_py
creating build
creating build/lib.linux-i686-2.7
creating build/lib.linux-i686-2.7/lxml
copying src/lxml/pyclasslookup.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/cssselect.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/__init__.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/_elementpath.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/doctestcompare.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/builder.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/ElementInclude.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/usedoctest.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/sax.py -> build/lib.linux-i686-2.7/lxml
creating build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/__init__.py -> build/lib.linux-i686-2.7/lxml/includes
creating build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/__init__.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_diffcommand.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/soupparser.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/builder.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/usedoctest.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/html5parser.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_setmixin.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_html5builder.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/defs.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/clean.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/ElementSoup.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/diff.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/formfill.py -> build/lib.linux-i686-2.7/lxml/html
creating build/lib.linux-i686-2.7/lxml/isoschematron
copying src/lxml/isoschematron/__init__.py -> build/lib.linux-i686-2.7/lxml/isoschematron
copying src/lxml/lxml.etree.h -> build/lib.linux-i686-2.7/lxml
copying src/lxml/lxml.etree_api.h -> build/lib.linux-i686-2.7/lxml
copying src/lxml/includes/htmlparser.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/tree.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/schematron.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlparser.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xinclude.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/c14n.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xpath.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xslt.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlschema.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlerror.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/uri.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/relaxng.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/etreepublic.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/config.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/dtdvalid.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/etree_defs.h -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/lxml-version.h -> build/lib.linux-i686-2.7/lxml/includes
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/rng
copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/rng
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build/temp.linux-i686-2.7
creating build/temp.linux-i686-2.7/src
creating build/temp.linux-i686-2.7/src/lxml
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip-build-u3iJ67/lxml/src/lxml/includes -I/usr/local/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-i686-2.7/src/lxml/lxml.etree.o -w
gcc -pthread -shared build/temp.linux-i686-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.7/lxml/etree.so
building 'lxml.objectify' extension
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip-build-u3iJ67/lxml/src/lxml/includes -I/usr/local/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.linux-i686-2.7/src/lxml/lxml.objectify.o -w
gcc -pthread -shared build/temp.linux-i686-2.7/src/lxml/lxml.objectify.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.7/lxml/objectify.so
running install_lib
creating /usr/local/lib/python2.7/site-packages/lxml
error: could not create '/usr/local/lib/python2.7/site-packages/lxml': Permission denied
----------------------------------------
Command "/usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-u3iJ67/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-0tAWPp-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-u3iJ67/lxml
请注意，如果您 运行 top 在单独的终端中，您会注意到您的系统正忙于构建 lxml 包：
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND<br>
1645 root 20 0 322224 305740 5384 R 100.0 29.8 3:27.47 /usr/lib/gcc/arm-linux-gnueabihf/5/cc1 -quiet -I /usr/include/libxml2 -I src/lxml/includes -I /usr/include/python2.7 -imultiarch arm -linux-gnueabihf -D_REENTRANT -D ...
如果您在资源有限的 VM 或 SBC 上构建，这可能需要一段时间...
我 运行 在具有 768MB ram 的 VM 上进行此操作（我没有注意到这是我设置的值）并且花了几个小时而且没有完成。
将 ram 更改为 3GB 使其在重新启动并重试后几分钟内完成。
我 运行 在尝试 "pip install" 一个依赖于 Raspberry Pi 1 B+ 上的 lxml 的包时遇到了同样的问题。几个小时后（和几次尝试），SSH 连接断开而没有完成 wheel 构建。好像是内存不足的情况。
我选择分别使用 apt install python-lxml 或 apt install python3-lxml 安装预构建的二进制包。
我认为你应该安装 cython。正如我在您的代码中看到的那样，据说：Building without Cython. 如果我们去 pypi 查找 lxml，据说 请注意，这需要 Cython 来构建源代码，请参阅构建项目主页上的说明。 这里是 link：lxml
最新版本的 pip，在使用 requirements.txt 或 setuptools/distutils setup.py[=13= 构建包时不必要地花费过多时间来构建轮子并解决依赖性问题]
快速修复是恢复到 21.0 之前的 pip 版本（最好在虚拟环境中），根据此讨论，旧版解析器仍然受支持：sunsetting legacy resolver
截至 2021 年 7 月 28 日，pip v21.2.1 似乎仍具有旧版解析器支持。
pip install pip==20.2.4
下面的命令使用早期版本的依赖解析器来安装 lxml。
pip install --use-deprecated=legacy-resolver lxml
节省了我很多时间和麻烦。
我在 vwmare 上 运行ning ubuntu 14.04 LTS 和 python 2.7.5。
当我运行:
sudo pip install lxml
我得到：
Collecting lxml
Using cached lxml-3.4.4.tar.gz
Building wheels for collected packages: lxml
Running setup.py bdist_wheel for lxml
运行永恒。
我找不到任何与此相关的资源，我也没有遇到过类似的错误。
请注意，以下解决方案不起作用：
sudo apt-get build-dep -y lxml;
pip install lxml
我也试过：
sudo apt-get install -y build-essential python-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version.
python-dev is already the newest version.
The following packages were automatically installed and are no longer required:
linux-headers-3.13.0-32 linux-headers-3.13.0-32-generic
linux-headers-3.13.0-57 linux-headers-3.13.0-57-generic
linux-image-3.13.0-32-generic linux-image-3.13.0-57-generic
linux-image-extra-3.13.0-32-generic linux-image-extra-3.13.0-57-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 75 not upgraded.
编辑：
我刚刚 运行 又得到了：
sudo pip install lxml
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Using cached lxml-3.4.4.tar.gz
Building wheels for collected packages: lxml
Running setup.py bdist_wheel for lxml
编辑 2：
pip install lxml
The directory '/home/myusername/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/myusername/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading lxml-3.4.4.tar.gz (3.5MB)
100% |████████████████████████████████| 3.5MB 7.0kB/s
Installing collected packages: lxml
Running setup.py install for lxml
编辑 3： 等待很长时间后命令给出：
pip install lxml
The directory '/home/mstaffel/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/mstaffel/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting lxml
/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading lxml-3.4.4.tar.gz (3.5MB)
100% |████████████████████████████████| 3.5MB 7.0kB/s
Installing collected packages: lxml
Running setup.py install for lxml
Complete output from command /usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-u3iJ67/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-0tAWPp-record/install-record.txt --single-version-externally-managed --compile:
/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Building lxml version 3.4.4.
Building without Cython.
Using build configuration of libxslt 1.1.28
running install
running build
running build_py
creating build
creating build/lib.linux-i686-2.7
creating build/lib.linux-i686-2.7/lxml
copying src/lxml/pyclasslookup.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/cssselect.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/__init__.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/_elementpath.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/doctestcompare.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/builder.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/ElementInclude.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/usedoctest.py -> build/lib.linux-i686-2.7/lxml
copying src/lxml/sax.py -> build/lib.linux-i686-2.7/lxml
creating build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/__init__.py -> build/lib.linux-i686-2.7/lxml/includes
creating build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/__init__.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_diffcommand.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/soupparser.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/builder.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/usedoctest.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/html5parser.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_setmixin.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/_html5builder.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/defs.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/clean.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/ElementSoup.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/diff.py -> build/lib.linux-i686-2.7/lxml/html
copying src/lxml/html/formfill.py -> build/lib.linux-i686-2.7/lxml/html
creating build/lib.linux-i686-2.7/lxml/isoschematron
copying src/lxml/isoschematron/__init__.py -> build/lib.linux-i686-2.7/lxml/isoschematron
copying src/lxml/lxml.etree.h -> build/lib.linux-i686-2.7/lxml
copying src/lxml/lxml.etree_api.h -> build/lib.linux-i686-2.7/lxml
copying src/lxml/includes/htmlparser.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/tree.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/schematron.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlparser.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xinclude.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/c14n.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xpath.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xslt.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlschema.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/xmlerror.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/uri.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/relaxng.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/etreepublic.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/config.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/dtdvalid.pxd -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/etree_defs.h -> build/lib.linux-i686-2.7/lxml/includes
copying src/lxml/includes/lxml-version.h -> build/lib.linux-i686-2.7/lxml/includes
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/rng
copying src/lxml/isoschematron/resources/rng/iso-schematron.rng -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/rng
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
copying src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl
creating build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_message.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_schematron_skeleton_for_xslt1.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_dsdl_include.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_svrl_for_xslt1.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/iso_abstract_expand.xsl -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
copying src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/readme.txt -> build/lib.linux-i686-2.7/lxml/isoschematron/resources/xsl/iso-schematron-xslt1
running build_ext
building 'lxml.etree' extension
creating build/temp.linux-i686-2.7
creating build/temp.linux-i686-2.7/src
creating build/temp.linux-i686-2.7/src/lxml
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip-build-u3iJ67/lxml/src/lxml/includes -I/usr/local/include/python2.7 -c src/lxml/lxml.etree.c -o build/temp.linux-i686-2.7/src/lxml/lxml.etree.o -w
gcc -pthread -shared build/temp.linux-i686-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.7/lxml/etree.so
building 'lxml.objectify' extension
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/tmp/pip-build-u3iJ67/lxml/src/lxml/includes -I/usr/local/include/python2.7 -c src/lxml/lxml.objectify.c -o build/temp.linux-i686-2.7/src/lxml/lxml.objectify.o -w
gcc -pthread -shared build/temp.linux-i686-2.7/src/lxml/lxml.objectify.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-i686-2.7/lxml/objectify.so
running install_lib
creating /usr/local/lib/python2.7/site-packages/lxml
error: could not create '/usr/local/lib/python2.7/site-packages/lxml': Permission denied
----------------------------------------
Command "/usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-u3iJ67/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-0tAWPp-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-u3iJ67/lxml
请注意，如果您 运行 top 在单独的终端中，您会注意到您的系统正忙于构建 lxml 包：
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND<br>
1645 root 20 0 322224 305740 5384 R 100.0 29.8 3:27.47 /usr/lib/gcc/arm-linux-gnueabihf/5/cc1 -quiet -I /usr/include/libxml2 -I src/lxml/includes -I /usr/include/python2.7 -imultiarch arm -linux-gnueabihf -D_REENTRANT -D ...
如果您在资源有限的 VM 或 SBC 上构建，这可能需要一段时间...
我 运行 在具有 768MB ram 的 VM 上进行此操作（我没有注意到这是我设置的值）并且花了几个小时而且没有完成。
将 ram 更改为 3GB 使其在重新启动并重试后几分钟内完成。
我 运行 在尝试 "pip install" 一个依赖于 Raspberry Pi 1 B+ 上的 lxml 的包时遇到了同样的问题。几个小时后（和几次尝试），SSH 连接断开而没有完成 wheel 构建。好像是内存不足的情况。
我选择分别使用 apt install python-lxml 或 apt install python3-lxml 安装预构建的二进制包。
我认为你应该安装 cython。正如我在您的代码中看到的那样，据说：Building without Cython. 如果我们去 pypi 查找 lxml，据说 请注意，这需要 Cython 来构建源代码，请参阅构建项目主页上的说明。 这里是 link：lxml
最新版本的 pip，在使用 requirements.txt 或 setuptools/distutils setup.py[=13= 构建包时不必要地花费过多时间来构建轮子并解决依赖性问题]
快速修复是恢复到 21.0 之前的 pip 版本（最好在虚拟环境中），根据此讨论，旧版解析器仍然受支持：sunsetting legacy resolver
截至 2021 年 7 月 28 日，pip v21.2.1 似乎仍具有旧版解析器支持。
pip install pip==20.2.4
下面的命令使用早期版本的依赖解析器来安装 lxml。
pip install --use-deprecated=legacy-resolver lxml
节省了我很多时间和麻烦。