fix pycurl link error

最新推荐文章于 2021-08-23 16:11:18 发布

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本文介绍了解决PyCurl安装过程中出现的SSL后台不一致错误的方法。首先尝试使用pip卸载并重新安装，设置正确的SSL库环境变量。若仍存在问题，则建议从源代码进行安装，并在安装前确保移除原有的PyCurl。另外还提到了当安装PyCurl时遇到版本依赖问题的解决办法。

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install pycurl with pip, but failed to import it, the error as follow

import pycurl
ImportError: pycurl: libcurl link-time ssl backend (nss) is different from compile-time ssl backend (none/other)

try

pip uninstall pycurl
export PYCURL_SSL_LIBRARY=[openssl|gnutls|nss] #错误中显示是 nss 则换成 nss
pip install pycurl

But not work.
refer the follows on http://stackoverflow.com/questions/21096436/pip-install-pycurl-ssl-backend-error
install pycurl with a source code and set a flag
(Note: the original pycurl should be remove by pip first)

sudo python setup.py --with-nss install

done~!

p.s.
can download pycurl at https://github.com/pycurl/pycurl

another case:
run sudo pip install pycurl, and get the following error message:

Installing collected packages: pycurl Running setup.py install for
pycurl
….
building ‘pycurl’ extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/src
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -DPYCURL_VERSION=”7.19.5.1” -DHAVE_CURL_OPENSSL=1 -DHAVE_CURL_SSL=1 -I/usr/local/include/python2.7 -c src/docstrings.c -o build/temp.linux-x86_64-2.7/src/docstrings.o
在包含自 src/docstrings.c：4 的文件中:
src/pycurl.h:59:4: 错误：#error “Need libcurl version 7.19.0 or greater to compile pycurl.”
error: command ‘gcc’ failed with exit status 1
….

get a curl package with a greater version from http://curl.haxx.se/download/ and install,
then sudo pip install pycurl done! and no error when import pycurl in python
if failed to import pycurl again, note that there are more than one libcurl.so in system, find them out and check the *.so path in /etc/ld.so.conf