为PHP添加GD库支持
1.安装zlib，一般Centos系统自带已经安装好，可以用以下命令去查看：# rpm -qa | grep zlib
zlib-1.2.1.2-1.2
zlib-devel-1.2.1.2-1.2
You have new mail in /var/spool/mail/root
#
有的话就不用安装了，没有就手动去下载编译：http://sourceforge.net/projects/zlib/
tar zxvf zlib-1.2.2.tar.gz（版本自己挑，没所谓）
cd zlib-1.2.2
./configure
make
make install
2.安装libpng
http://sourceforge.net/projects/libpng/
tar zxvf libpng-1.4.2.tar.tar
cd libpng-1.4.2
./configure
make
make install
3.安装freetype
http://sourceforge.net/projects/freetype/
tar zxvf freetype-2.3.12.tar.gz
cd freetype-2.3.12
./configure
make
make install
4.安装Jpeg
http://www.ijg.org/
tar zxvf jpegsrc.v8b.tar.gz
cd jpeg-8b/
./configure --enable-shared
make
make test
make install
注意，这里configure一定要带--enable-shared参数，不然，不会生成共享库
5.安装GD
http://download.chinaunix.net/download/0004000/3479.shtml
GD-2.44.tar.gz不会安装，^_^
换回gd-2.0.33.tar.gz
tar zxvf gd-2.0.33.tar.gz
cd gd-2.0.33
./configure --with-png --with-freetype --with-jpeg
make
make install
6.安装PHP
php-5.2.11.tar.gz
tar zxvf php-5.2.11.tar.gz
cd php-5.2.11
./configure选项见下方
make
make install
注：
/usr/local/include/freetype2/freetype
freetype
/usr/local/include/include
t1lig
/usr/local/include/libpng14/
png
/usr/local/include
jpeg
# ./configure --help | grep t1lib
--with-t1lib[=DIR] GD: Include T1lib support. T1lib version >= 5.0.0 required
# ./configure --help | grep png
--with-png-dir[=DIR] GD: Set the path to libpng install prefix
# ./configure --help | grep jpeg
--with-jpeg-dir[=DIR] GD: Set the path to libjpeg install prefix
# ./configure --help | grep freetype
--with-freetype-dir[=DIR] GD: Set the path to FreeType 2 install prefix
#
./configure --prefix=/opt/php5 --with-apxs2=/opt/apache/bin/apxs --with-mysql=/usr/local/mysql --with-config-file-path=/opt/php5/lib --with-gd --with-zlib --with-png-dir=/usr/local/include/libpng14/--with-jpeg-dir=/usr/local/include--with-freetype-dir=/usr/local/include/freetype2/freetype （--with-t1lib--with-t1lib-dir=/usr/local/include/include）
最后只有T1Lib Support没有启用。
GD库支持最终如下：
gd
GD Supportenabled
GD Versionbundled (2.0.34 compatible)
FreeType Supportenabled
FreeType Linkagewith freetype
FreeType Version2.3.12
GIF Read Supportenabled
GIF Create Supportenabled
JPG Supportenabled
PNG Supportenabled
WBMP Supportenabled
XBM Supportenabled
在apache配置文件中添加如下内容：
Listen 81
#
# Dynamic Shared Object (DSO) Support
#
# To be able to use the functionality of a module which was built as a DSO you
# have to place corresponding `LoadModule' lines at this location so the
# directives contained in it are actually available _before_ they are used.
# Statically compiled modules (those listed by `httpd -l') do not need
# to be loaded here.
#
# Example:
# LoadModule foo_module modules/mod_foo.so
LoadModule php5_module modules/libphp5.so
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
#
<IfModule !mpm_netware_module>
在htdocs文件夹里建立以下文件info.php
# cat htdocs/info.php
<?php
echo phpinfo();
?>
#
可查询GD库支持的情况。
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