CentOS7下安装GraphicsMagick1.3.21

本文只涉及GraphicsMagick1.3.21的安装，具体使用场景和依赖环境请跳转到我的另一篇文章：nginx+lua+GraphicsMagick生成实时缩略图，本文不多做叙述。

一、安装GraphicsMagick

最简化安装，如下：

下载

cd /usr/local/src/
wget http://ftp.icm.edu.pl/pub/unix/graphics/GraphicsMagick/1.3/GraphicsMagick-1.3.21.tar.gz

解压

tar zxvf GraphicsMagick-1.3.21.tar.gz

安装

cd GraphicsMagick-1.3.21
./configure
make -j8
make install

测试

gm version

输出以下信息说明安装成功：

GraphicsMagick 1.3.21 2015-02-28 Q8 http://www.GraphicsMagick.org/
Copyright (C) 2002-2014 GraphicsMagick Group.
Additional copyrights and licenses apply to this software.
See http://www.GraphicsMagick.org/www/Copyright.html for details.

Feature Support:
  Native Thread Safe       yes
  Large Files (> 32 bit)   yes
  Large Memory (> 32 bit)  yes
  BZIP                     no
  DPS                      no
  FlashPix                 no
  FreeType                 yes
  Ghostscript (Library)    no
  JBIG                     no
  JPEG-2000                no
  JPEG                     yes
  Little CMS               no
  Loadable Modules         no
  OpenMP                   yes (201107)
  PNG                      yes
  TIFF                     yes
  TRIO                     no
  UMEM                     no
  WebP                     no
  WMF                      no
  X11                      no
  XML                      no
  ZLIB                     yes

Host type: x86_64-unknown-linux-gnu

Configured using the command:
  ./configure 

Final Build Parameters:
  CC       = gcc -std=gnu99
  CFLAGS   = -fopenmp -g -O2 -Wall -pthread