运行`pip install`的Ubuntu给出错误'无法构建以下必需的软件包：* freetype'

Question

执行时pip install -r requirements.txt，在安装阶段出现以下错误matplotlib：

REQUIRED DEPENDENCIES AND EXTENSIONS
                 numpy: yes [not found. pip may install it below.]
              dateutil: yes [dateutil was not found. It is required for date
                        axis support. pip/easy_install may attempt to
                        install it after matplotlib.]
               tornado: yes [tornado was not found. It is required for the
                        WebAgg backend. pip/easy_install may attempt to
                        install it after matplotlib.]
             pyparsing: yes [pyparsing was not found. It is required for
                        mathtext support. pip/easy_install may attempt to
                        install it after matplotlib.]
                 pycxx: yes [Couldn't import.  Using local copy.]
                libagg: yes [pkg-config informathtml" target="_blank">ion for 'libagg' could not
                        be found. Using local copy.]
              freetype: no  [pkg-config information for 'freetype2' could
                        not be found.]

…

The following required packages can not be built:

                    * freetype

还不应该pip install -r requirements.txt安装freetype吗？freetype应该如何在Ubuntu
12.04中安装以便与它一起使用matplotlib？

Answer 1

号pip将不会安装系统级的依赖性。这意味着pip将不会安装RPM（ 基于Redhat的系统 ）或DEB（ 基于Debian的系统 ）。

要安装系统依赖项，您将需要根据系统使用以下方法之一。

Ubuntu / Debian：

apt-get install libfreetype6-dev

要在基于Ubuntu / Debian的系统上搜索软件包：

apt-cache search <string>

例如：

apt-cache search freetype | grep dev

Redhat / CentOS / Fedora：

yum -y install freetype-devel

要在基于Redhat / CentOS / Fedora的系统上搜索软件包：

yum search <string>

例如：

yum search freetype | grep devel

Mac OS X的： （ 通过 自制）

brew install freetype

在基于Mac OS X的系统上搜索软件包：

brew search <string>

例如：

brew search freetype