在Linux下安装PHP过程中，编译时出现configure: error: libjpeg.(a|so) not found 错误的解决办法
检查之后发现已经安装了libjpeg
[root@localhost php-5.2.14]# yum list installed|grep libpng
libpng.x86_64 2:1.2.49-1.el6_2
或者：
[root@localhost php-5.2.14]# rpm -qa|grep libjpeg
libjpeg-turbo-1.2.1-3.el6_5.x86_64
安装libjpeg-devel
yum -y install libjpeg-devel
[root@localhost php-5.2.14]# yum list installed|grep libjpeg
libjpeg-turbo.x86_64 1.2.1-3.el6_5 @base
libjpeg-turbo-devel.x86_64
[root@localhost php-5.2.14]# rpm -ql libjpeg-turbo-devel.x86_64
/usr/include/jconfig.h
/usr/include/jerror.h
/usr/include/jmorecfg.h
/usr/include/jpeglib.h
/usr/lib64/libjpeg.so
/usr/share/doc/libjpeg-turbo-devel-1.2.1
/usr/share/doc/libjpeg-turbo-devel-1.2.1/coderules.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.1/example.c
/usr/share/doc/libjpeg-turbo-devel-1.2.1/jconfig.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.1/libjpeg.txt
/usr/share/doc/libjpeg-turbo-devel-1.2.1/structure.txt