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linking problem/ unresolved symbol

sandeepb
Prodigy 110 points


i referred example projects and then i created my own project xyz and 've included all the required header files but still i m getting following errors-

errors encountered during linking; "xyz.out" not built  

unresolved symbol _main, first referenced in C:\\Program  


i m using only assembly coding. Interestingly, when i add a 'c'source file ( "hello world") to my project the above mentioned errors are resolved and the build is complete.

i m using ccsv4.1 core edition with F283x CPU cycle accurate simulator.

  • 0
    TI__Guru**** 173310 points

    The default entry point for C programs is c_int00 which performs C initializaton before calling "main". Since this is an assembly only program, you will need to specify the entry point of your application with the -e linker option. You can set this in the Build Properties (right-click on the project, select 'Build Properties' in the context menu, select 'C/C++ Build' in the left pane, select the 'Tool Settings' tab and under the Linker options mode, select 'Symbol Management' and see the option to Specify the program entry point.

  • 0 in reply to AartiG
    Prodigy 110 points

    1. As you mentioned i see the option specify the program entry point in symbol management. but i don't know what should be the entry point for my project? I mean how does an entry point specified? i think i m clear..!

    2. During the creation of my project i didn't check the box  "Treat as an assemly only project". I created a new project, checked the box for 'assembly only project' and now the build is complete without any errors!

    please guide.

     

     

  • 0 in reply to sandeepb
    TI__Guru**** 173310 points

    sandeepb said:

    1. As you mentioned i see the option specify the program entry point in symbol management. but i don't know what should be the entry point for my project? I mean how does an entry point specified? i think i m clear..!

    The entry point is the label in your assembly routine at which the program starts.

    sandeepb said:

    2. During the creation of my project i didn't check the box  "Treat as an assemly only project". I created a new project, checked the box for 'assembly only project' and now the build is complete without any errors!

    please guide.



    Checking this box disables the addition of the runtime library. It is the runtime library which contains the boot code for C programs and sets the entry point to c_int00 as I mentioned earlier. So either of the above 2 solutions would allow you to build assembly only projects.

     

  • 0 in reply to AartiG
    Prodigy 110 points

     ya got it!

    thanks and regards!