编译安装 GD

GD不是必须的，如果要安装GD，那么 jpeg 库，png 库，zlib 库则是必须的，其余的选择安装。
2.1、编译安装 Zlib
wget http://zlib.net/zlib-1.2.5.tar.gz
tar -zxf zlib-1.2.5.tar.gz
cd zlib-1.2.5/
./configure --prefix=/usr/local
make && make install

2.2、编译安装 PNG
wget ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng-1.4.4.tar.gz
tar -zxf libpng-1.4.4.tar.gz
cd libpng-1.4.4/
./configure --prefix=/usr/local
make && make install

2.3、编译安装 JPEG
 wget http://www.ijg.org/files/jpegsrc.v8b.tar.gz
tar -zxf jpegsrc.v8b.tar.gz
cd jpeg-8b/
./configure --prefix=/usr/local
make && make install

2.4、编译安装 Libiconv
 wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.13.1.tar.gz
tar -zxf libiconv-1.13.1.tar.gz
cd libiconv-1.13.1/
./configure --prefix=/usr/local
make && make install

2.5、编译安装 FreeType
wget http://nchc.dl.sourceforge.net/project/freetype/freetype2/2.4.3/freetype-2.4.3.tar.bz2
tar -jxf freetype-2.4.3.tar.bz2
cd freetype-2.4.3/
./configure --prefix=/usr/local
make && make install

2.6、编译安装 GD
wget http://www.libgd.org/releases/gd-2.0.36RC1.tar.gz
tar -zxf gd-2.0.36RC1.tar.gz
cd gd-2.0.36RC1/
./configure --prefix=/usr/local --with-libiconv-prefix=/usr/local --with-png=/usr/local --with-freetype=/usr/local --with-jpeg=/usr/local
make && make install