安装gd需要以下库：
gd-2.0.33.tar.gz http://www.boutell.com/gd/
jpegsrc.v6b.tar.gz http://www.ijg.org/
libpng-1.2.7.tar.tar http://sourceforge.net/projects/libpng/
zlib-1.2.2.tar.gz http://sourceforge.net/projects/zlib/
freetype-2.1.9.tar.gz http://sourceforge.net/projects/freetype/
1、安装 zlib - zlib-1.2.8.tar.gz
wget ftp://ftp.sunfreeware.com/pub/freeware/SOURCES/zlib-1.2.3.tar.gz
tar -zxf zlib-1.2.3.tar.gz
cd zlib-1.2.3
./configure --prefix=/usr/local/zlib
make
make install
2、安装 jpeg - 我用的是 jpegsrc.v9.tar.gz
wget ftp://ftp.sunfreeware.com/pub/freeware/SOURCES/jpeg.tar.gz
安装前先创建jpeg安装文件所需(如下)目录，防止提示类似“无法创建一般文件‘/usr/local/jpeg/***’: 没有那个文件或目录" 的错误
（此处插入提示：本人用root账号安装时未出现此情况)
mkdir /usr/local/jpeg
mkdir /usr/local/jpeg/bin
mkdir /usr/local/jpeg/lib
mkdir /usr/local/jpeg/include
mkdir /usr/local/jpeg/man
mkdir /usr/local/jpeg/man1
mkdir /usr/local/jpeg/man/man1
tar -zxf jpeg.tar.gz
cd jpeg-6b
./configure --prefix=/usr/local/jpeg --enable-shared --enable-static
make
make install
3、安装 libpng - 我用的是 libpng-1.6.9
wget ftp://ftp.sunfreeware.com/pub/freeware/SOURCES/libpng-1.2.16.tar.gz
tar -zxf libpng-1.2.16.tar.gz
cd libpng-1.2.16
4、安装 freetype --安装此包需要 libpng库依赖，安到默认位置 我用的是 freetype-2.5.1
wget http://download.savannah.nongnu.org/releases/freetype/freetype-2.3.4.tar.gz
tar -zxf freetype-2.3.4.tar.gz
cd freetype-2.3.4
mkdir -p /usr/local/freetype
./configure --prefix=/usr/local/freetype
make
make install
5、安装 GD -- 我用的是 libgd-2.1.0.tar.gz
wget ftp://ftp.sunfreeware.com/pub/freeware/SOURCES/gd-2.0.33.tar.gz
tar -zxf gd-2.0.33.tar.gz
cd gd-2.0.33
mkdir -p /usr/local/gd2
./configure --prefix=/usr/local/gd2 --with-jpeg=/usr/local/jpeg/ --with-png=/usr/local/libpng/ --with-zlib=/usr/local/zlib/ --with-freetype=/usr/local/freetype/
make
make install
last :php安装gd
./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql --with-zlib --with-jpeg-dir=/usr/local/jpeg --with-png-dir=/usr/local/png --with-freetype-dir=/usr/local/freetype --enable-ftp --enable-sockets --with-gd=/usr/local/gd2 --enable-gd-native-ttf --with-ttf --enable-magic-quotes --with-iconv -enable-mbstring=all
OK 全部完成
PS：如果安装有报错:
configure.ac:64: error: possibly undefined macro: AM_ICONV
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
make: *** [configure] Error 1
需要安装gettext 这里下载
./configure --prefix=/usr/local/libpng
make
make install