在我的例子中，是缺少libffi-dev包。

工作:

sudo apt-get install libffi-dev

在我的情况下，pip无法安装库，我尝试了上面给出的解决方案，但没有一个有效，但下面的方法对我有效:

sudo apt upgrade gcc

您需要安装这些软件包:

sudo apt-get install libpq-dev python-dev libxml2-dev libxslt1-dev libldap2-dev libsasl2-dev libffi-dev libjpeg-dev zlib1g-dev

我的堆栈是这样的:

> >                            ^
> >     In file included from /usr/include/openssl/ssl.h:156:0,
> >                      from OpenSSL/crypto/x509.h:17,
> >                      from OpenSSL/crypto/crypto.h:17,
> >                      from OpenSSL/crypto/crl.c:3:
> >     /usr/include/openssl/x509.h:751:15: note: previous declaration of ‘X509_REVOKED_dup’ was here
> >      X509_REVOKED *X509_REVOKED_dup(X509_REVOKED *rev);
> >                    ^
> >     error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
> >     
> >     ----------------------------------------   Rolling back uninstall of > pyOpenSSL Command "/home/marta/env/pb/bin/python -u -c
> "import setuptools,
> > tokenize;__file__='/tmp/pip-build-14ekWY/pyOpenSSL/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n',
> > '\n');f.close();exec(compile(code, __file__, 'exec'))" install
> > --record /tmp/pip-2HERvW-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/marta/env/pb/include/site/python2.7/pyOpenSSL" failed with error
> > code 1 in /tmp/pip-build-14ekWY/pyOpenSSL/

在同样的情况下，请考虑其中一个安装文件中的错字(错误)，并手动编辑它，将“X509_REVOKED_dup”更改为“X509_REVOKED_dupe”(没有引号)。我已经编辑了x509.h文件:

sed -e的 usr / include / openssl - x509。h

这对我来说很有效，但请参考下面链接的帖子，因为他们编辑了另一个文件:

sed -e's/X509_REVOKED_dup/X509_REVOKED_dupe/g' -i OpenSSL/crypto/crl.c . sed -e's/X509_REVOKED_dup/X509_REVOKED_dupe/g

https://groups.google.com/forum/ !主题/ kivy-users / Qt0jNIOACZc

在我的例子中，是缺少libffi-dev包。

工作:

sudo apt-get install libffi-dev

在我的案例中，是oursql导致了如下所示的相同(通用)错误。

In file included from oursqlx/oursql.c:236:0:
  oursqlx/compat.h:13:19: fatal error: mysql.h: No such file or directory
  compilation terminated.
  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

  ----------------------------------------
  Failed building wheel for oursql
  Running setup.py clean for oursql

因此，我知道我需要libmysqlcppconn-dev包。

sudo apt-get install libmysqlcppconn-dev

一切都好!