php怎么安装gd扩展

yum install libXpm-devel

  wget http://zlib.net/zlib-1.2.8.tar.gz
   tar -xzvf zlib-1.2.8.tar.gz
   cd zlib-1.2.8
   ./configure 
   make && make install
   make clean && make distclean
   cd ../

wget http://www.ijg.org/files/jpegsrc.v9b.tar.gztar -xzvf jpegsrc.v9b.tar.gz
cd jpegsrc.v9b
./configure \--prefix=/usr/lib64 \--enable-shared \--enable-staticmake && make instll
make clean && make distclean
libtool --finish /usr/local/jpeg/lib
cd ../

yum install libpng libpng-devel

wget http://download.savannah.gnu.org/releases/freetype/freetype-2.7.tar.gztar -xzvf freetype-2.7.tar.gz
cd freetype-2.7./configure \--prefix=/usr/lib64
make && make install 
make clean && make distclean
cd ../

$ cd [php安装目录]
$ cd ext/gd
$ /usr/local/php/bin/phpize
$ ./configure --with-php-config=/usr/local/php/bin/php-config --with-png-dir --with-freetype-dir --with-jpeg-dir --with-gd
$ make
$ make install

Installing shared extensions:     /alidata/server/php-5.5.38/lib/php/extensions/no-debug-non-zts-20121212/