Am1808 with Sysbios and ndk, ndk.lib and rtsv5_A_le_eabi.lib “printf” redfine?

i want to use ndk in am1808   when i link ndk.lib , there is a linking error:

'Building target: CronusArm.out'
'Invoking: TMS470 Linker'
"C:/ti/ccsv5/tools/compiler/tms470/bin/cl470" -mv5e -g --diag_warning=225 --display_error_number --no_warnings -me --abi=eabi --code_state=32 -z -m"CronusArm.map" --warn_sections -i"C:/ti/ccsv5/tools/compiler/tms470/lib" -i"C:/ti/ccsv5/tools/compiler/tms470/include" --reread_libs --rom_model -o "CronusArm.out" -l"./configPkg/linker.cmd" "./L138/package/package_L138.obj" "./hal/common/Utils.obj" "./hal/common/CircleBuf.obj" "./hal/gpio/GpioCtrl.obj" "./hal/i2c/I2CCtrl.obj" "./hal/main.obj" "./hal/spi/SpiCtrl.obj" "./hal/spiflash/SpiFlashCtrl.obj" "./hal/system/SystemCtrl.obj" "./hal/uart/UartCtrl.obj" "./src/NetWorkService.obj" -l"libc.a" "../linkerEx.cmd" "../lib/hal.lib" "../lib/ndk.lib" "../hal/libs/drivers.lib" "../hal/libs/platform.lib"
<Linking>
error #10056: symbol "printf" redefined: first defined in
"C:\ti\ccsv5\tools\compiler\tms470\lib\rtsv5_A_le_eabi.lib<printf.obj>";
redefined in "../lib/ndk.lib<miniPrintf.oe9>"
error #10010: errors encountered during linking; "CronusArm.out" not built

>> Compilation failure
gmake: *** [CronusArm.out] Error 1
gmake: Target `all' not remade because of errors.

**** Build Finished ****

why??????  why rtsv5_A_le_eabi.lib<printf.obj> and   ndk.lib<miniPrintf.oe9>  in this error?