GNU Info

(stabs.info)Main Program

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Main Program
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   Most languages allow the main program to have any name.  The
`N_MAIN' stab type tells the debugger the name that is used in this
program.  Only the string field is significant; it is the name of a
function which is the main program.  Most C compilers do not use this
stab (they expect the debugger to assume that the name is `main'), but
some C compilers emit an `N_MAIN' stab for the `main' function.  I'm
not sure how XCOFF handles this.