So, After I repeated the whole process.
I try to build the code
the error is :
error #10056: symbol "ResetISR" redefined: first defined in "./startup_ccs.obj"; redefined in "./lm4f120h5qr_startup_ccs.obj"
error #10056: symbol "g_pfnVectors" redefined: first defined in "./startup_ccs.obj"; redefined in "./lm4f120h5qr_startup_ccs.obj"
warning #10210-D: creating ".stack" section with default size of 0x800; use the -stack option to change the default size
error #10010: errors encountered during linking; "Lab2.out" not built
>> Compilation failure
gmake: *** [Lab2.out] Error 1
gmake: Target `all' not remade because of errors.
**** Build Finished ****