请问大侠CSL_GPIO_open()函数，在CSL库中，那个文件里面定义，那个文件里面申明。我找不到了。我在编译的时候，出现了如下错误，请高手指教。
**** Clean-only build of configuration Debug for project GPIO ****
D:\CCS5.0\ccsv5\utils\gmake\gmake -k clean
DEL /F "GPIO.out"
找不到 F:\TMXEVM6678LE\GPIO\Debug\GPIO.out
DEL /F "C66x_gpio.pp" "GPIO.pp"
DEL /F "C66x_gpio.obj" "GPIO.obj"
'Finished clean'
' '
**** Build of configuration Debug for project GPIO ****
D:\CCS5.0\ccsv5\utils\gmake\gmake -k all
'Building file: ../C66x_gpio.c'
'Invoking: C6000 Compiler'
"D:/CCS5.0/ccsv5/tools/compiler/c6000/bin/cl6x" -mv6200 -g --include_path="D:/CCS5.0/ccsv5/tools/compiler/c6000/include" --include_path="F:\TMXEVM6678LE\GPIO" --include_path="D:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages" --include_path="D:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages\ti\csl" --diag_warning=225 --abi=coffabi --preproc_with_compile --preproc_dependency="C66x_gpio.pp" "../C66x_gpio.c"
'Finished building: ../C66x_gpio.c'
' '
'Building file: ../GPIO.c'
'Invoking: C6000 Compiler'
"D:/CCS5.0/ccsv5/tools/compiler/c6000/bin/cl6x" -mv6200 -g --include_path="D:/CCS5.0/ccsv5/tools/compiler/c6000/include" --include_path="F:\TMXEVM6678LE\GPIO" --include_path="D:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages" --include_path="D:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages\ti\csl" --diag_warning=225 --abi=coffabi --preproc_with_compile --preproc_dependency="GPIO.pp" "../GPIO.c"
'Finished building: ../GPIO.c'
' '
'Building target: GPIO.out'
'Invoking: C6000 Linker'
"D:/CCS5.0/ccsv5/tools/compiler/c6000/bin/cl6x" -mv6200 -g --diag_warning=225 --abi=coffabi -z -m"GPIO.map" --stack_size=0x400 --warn_sections -i"D:/CCS5.0/ccsv5/tools/compiler/c6000/lib" -i"D:/CCS5.0/ccsv5/tools/compiler/c6000/include" --reread_libs --rom_model -o "GPIO.out" "./GPIO.obj" "./C66x_gpio.obj" -l"D:\Program Files\Texas Instruments\pdk_C6678_1_0_0_9_beta2\packages\ti\csl\lib\ti.csl.ae66"
<Linking>
undefined first referenced
symbol in file
--------- ----------------
_CSL_GPIO_open ./C66x_gpio.obj
error: unresolved symbols remain
error: errors encountered during linking; "GPIO.out" not built
>> Compilation failure
gmake: *** [GPIO.out] Error 1
gmake: Target `all' not remade because of errors.
谢谢指导。
