directfb plugin of qte.4.4.3 can not be loaded when running application

Hi, i have compiled the qte4.4.3 with the -plugin-gfx-directfb configure option item and the .so file of the directfb plugin is generated in the corresbonding directory, but when i tried to run my application with the directfb plugin after compiling, the directfb plugin could not be loaded and some errors displayed.
The error information is :
"QLibrary::load_sys: Cannot load /qte/qtet4/plugins/gfxdrivers/libqdirectfbscreen.so.1.0.0 (/lib/libdl.so.2: symbol _dl_open, version GLIBC_2.0 not defined in file libc.so.6 with link time reference)"
I guessed maybe there are some syntax int the directfb driver needs some compiler support which is not in my current compiler that was used to compile the qte4.4.3.
The qt version i used is qt for embedded linux 4.4.3, the directfb i used is directfb1.0.0, and the compiler i used to compile the qte libraray is arm-linux-gcc3.4.1.
This problem has confused me for some days,can anyone help me or give me some tips about how to solve this probem? thank you.