Configure qemu-1.4.2 on CentOS 6.2 with --enable-sdl

I want to install qemu-1.4.2 on my CentOS 6.2. I downloaded the source code, unpacked and ran ./configure --disable-vnc --enable-sdl. Then it prompted it cannot find sdl:

ERROR
ERROR: User requested feature sdl
ERROR: configure was not able to find it
ERROR

Then I installed SDL and SDL-devel packages and ran ./configure again. It still prompted it cannot find sdl. The screenshot showed that I have installed SDL packages, so why it still complains? Please help, I really need qemu to work on my project.

via Chebli Mohamed