当我尝试通过pip安装mysqlclient时，遇到‘for’循环的初始声明仅在C99模式错误中被允许

Question

由于以下错误，我无法通过pip3安装Python mysqlclient库

$ pip3.6 install mysqlclient
...
MySQLdb/_mysql.c: In function ‘_mysql_row_to_dict_cached’:
MySQLdb/_mysql.c:1340:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
     for (unsigned int i=0; i

The OS is CentOS Linux release 7.7.1908 (Core), the gcc version is shown below

$ gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Answer 1

我不得不安装一个新的gcc版本，不幸的是这个包没有出现在标准的库中，我不得不将软件集合库添加到系统中，详细的操作方法可以在here上找到。

    yum install centos-release-scl -y
    yum install devtoolset-7-gcc* -y
    scl enable devtoolset-7 bash
    pip3 install mysqlclient