undefined first referenced symbol in file ——— —————- _main 出现的问题

**** Build of configuration Debug for project key_sample_restor ****

"C:\\ti\\ccsv8\\utils\\bin\\gmake" -k -j 4 all -OBuilding file: "../scr/key/key.c"
Invoking: C5500 Compiler
"C:/ti/ccsv8/tools/compiler/c5500_4.4.1/bin/cl55" -v5509A –memory_model=large -g –include_path="C:/ti/ccsv8/tools/compiler/c5500_4.4.1/include" –include_path="C:/ti/include" –define=CHIP_5509A –display_error_number –diag_warning=225 –ptrdiff_size=32 –preproc_with_compile –preproc_dependency="scr/key/key.d_raw" –obj_directory="scr/key" "../scr/key/key.c"
Finished building: "../scr/key/key.c"
Building file: "../scr/main.c"
Invoking: C5500 Compiler
"C:/ti/ccsv8/tools/compiler/c5500_4.4.1/bin/cl55" -v5509A –memory_model=large -g –include_path="C:/ti/ccsv8/tools/compiler/c5500_4.4.1/include" –include_path="C:/ti/include" –define=CHIP_5509A –display_error_number –diag_warning=225 –ptrdiff_size=32 –preproc_with_compile –preproc_dependency="scr/main.d_raw" –obj_directory="scr" "../scr/main.c"
Finished building: "../scr/main.c"
Building target: "key_sample_restor.out"
Invoking: C5500 Linker
"C:/ti/ccsv8/tools/compiler/c5500_4.4.1/bin/cl55" -v5509A –memory_model=large -g –define=CHIP_5509A –display_error_number –diag_warning=225 –ptrdiff_size=32 -z -m"key_sample_restor.map" –stack_size=0x200 –heap_size=0x400 -i"C:/ti/ccsv8/tools/compiler/c5500_4.4.1/lib" -i"C:/ti/lib" –reread_libs –display_error_number –warn_sections –xml_link_info="key_sample_restor_linkInfo.xml" –rom_model –sys_stacksize=0x200 -o "key_sample_restor.out" "./scr/key/key.obj" "./scr/main.obj" "../VC5509.cmd" -l"C:/ti/lib/csl5509ax.lib" -l"C:/ti/ccsv8/tools/compiler/c5500_4.4.1/lib/rts55x.lib"<Linking>
undefined first referenced symbol in file ——— —————- _main C:/ti/ccsv8/tools/compiler/c5500_4.4.1/lib/rts55x.lib<args_main.obj>
error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "key_sample_restor.out" not
built
>> Compilation failure
makefile:147: recipe for target 'key_sample_restor.out' failed
gmake[1]: *** [key_sample_restor.out] Error 1
makefile:143: recipe for target 'all' failed
gmake: *** [all] Error 2

**** Build Finished ****

Shine：

请到工程属性里查看一下是否添加了rts55x.lib库？