给php增加gd库（转）

1.安装zlib
tar zxvf zlib-1.2.3.tar.gz
cd zlib-1.2.3
./configure --prefix=/usr/local/zlib
make
make install 

2.安装libpng
tar zxvf libpng-1.2.8.tar.tar
cd libpng-1.2.8
mv ./scripts/makefile.linux ./makefile
make
make install
注意，这里的makefile不是用./configure生成，而是直接从scripts/里拷一个 

3.安装freetype
tar zxvf freetype-2.1.10.tar.gz
cd freetype-2.1.10
./configure --prefix=/usr/local/freetype
make
make install 

4.安装Jpeg
tar zxvf jpegsrc.v6b.tar.gz
cd jpeg-6b/
./configure --prefix=/usr/local/jpeg6 --enable-shared --enable-static
make
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
tar zxvf gd-2.0.33.tar.gz
cd gd-2.0.33
./configure --with-png --with-jpeg --with-freetype=/usr/local/freetype
make
make install 

6.重新编译PHP
tar zxvf php-4.3.9.tar.gz
cd php-4.3.9
./configure (以前的参数) --with-gd --enable-gd-native-ttf --with-zlib-dir=/usr/local/zlib --with-png --with-jpeg --with-freetype-dir=/usr/local/freetype
make
make install