pycurl mac 安装报错Curl is configured to use SSL,

1、使用安装第三方插件的方式安装pycurl：pip3 install pycurl

报错提示如下：

Curl is configured to use SSL, but we have not been able to determine which SSL backend it is using. Please see PycURL documentation for how to specify the SSL backend manually.'

2、网上通用版解决方式

pip uninstall pycurl
export PYCURL_SSL_LIBRARY=openssl
pip install pycurl

然而对我不管用‘

靠谱答案来源：https://stackoverflow.com/questions/51075738/install-pycurl-after-mac-update-to-high-sierra-ssl-error，以下方式安装成功：

(env)$ pip uninstall pycurl
(env)$ pip install --upgrade pip
(env)$ export LDFLAGS=-L/usr/local/opt/openssl/lib
(env)$ export CPPFLAGS=-I/usr/local/opt/openssl/include
(env)$ export PYCURL_SSL_LIBRARY=openssl
(env)$ pip install pycurl