CentOS matplotlib freetype png

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服务器上用virtualenv部署安装matplotlib，始终无法安装，错误日志如下:

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freetype: no  [The C/C++ header for freetype2 (ft2build.h)

          could not be found.  You may need to install the

          development package.]

     png: no  [pkg-config information for 'libpng' could not

          be found.]

   qhull: yes [pkg-config information for 'qhull' could not be

          found. Using local copy.]

安装缺失依赖:

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sudo yum install freetype

之后重新安装还是不行,彻底解决方案为:

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sudo yum -y install freetype freetype-devel libpng-devel